News:



  • June 16, 2025, 04:25:33 PM

Login with username, password and session length

Author Topic: Electric retracts for RSM Shark 45?  (Read 7478 times)

Offline Skip Chernoff

  • 21 supporter
  • Trade Count: (0)
  • Admiral
  • *
  • Posts: 1446
Electric retracts for RSM Shark 45?
« on: February 13, 2017, 07:19:52 AM »
While I'm waiting for the weather to break so I can paint my recent projects, I've decided to start building my RSM Shark 45. It will be powered by a trusty ST 60. Just for fun I'd like to install retracts. All of the retracts that I own from my R/C Pattern and Sport Scale days appear to be too heavy (with all components weighed) to be practical for stunt. I have noticed at the R/C field fellows flying these foamie ARF scale models with electric retracts that seem to work very well. I'd plan on using the 2.4 radio option to not only cycle the gear, but also for a one time throttle cut allowed by  the rules.So here are the questions....Anybody here have experience with the current crop of electric retracts and can make a recommendation?  Secondly, because of the lack of space in the nose area, the Shark MIGHT have to be built as a tail dragger.  Would it still be allowed to fly in "Classic" as a tail dragger? Thanks, for any light you can shed on my questions......PhillySkip

Offline phil c

  • 21 supporter
  • Trade Count: (0)
  • Admiral
  • *
  • Posts: 2480
Re: Electric retracts for RSM Shark 45?
« Reply #1 on: February 13, 2017, 01:33:20 PM »
I would think if you picked a setup for similar weight RC plane it would be fine.  Considering stunt flyers generally land better than most RC'ers one weight bracket down should be OK too/
phil Cartier

Offline dennis lipsett

  • Trade Count: (0)
  • Admiral
  • ******
  • Posts: 1718
Re: Electric retracts for RSM Shark 45?
« Reply #2 on: February 13, 2017, 05:06:44 PM »
E flite has really the best electric retracts for the job. Dynam, FMS, and Freewing have problems with reliability. I think they all use retracts from the same manufacturer but not positive about it.
I do know that Bob Hunt and Buddy Wieder used E flight retracts on their nats entry twins. These were 15 sized retracts and it is proven that they can handle at least 80  ounces reliably. Cost is reasonable and parts are readily available. Big advantage is they are a compact design.


Dennis

Offline Skip Chernoff

  • 21 supporter
  • Trade Count: (0)
  • Admiral
  • *
  • Posts: 1446
Re: Electric retracts for RSM Shark 45?
« Reply #3 on: February 13, 2017, 05:16:34 PM »
Thanks Phil and Dennis .I'm going to look into the Eflight 15 sized units as you suggested. I'm hoping that I can get a nose gear unit to fit in the nose. The nose gear would be easier to fit if I went with an electric power set up,but I just love the sound of sweet running ST 60.

Offline eric rule

  • 2017
  • Trade Count: (0)
  • Commander
  • *
  • Posts: 287
Re: Electric retracts for RSM Shark 45?
« Reply #4 on: February 13, 2017, 06:15:33 PM »
Hi Skip:

Totally agree with Dennis.

Go with the .15 size electric retracts. Dave Sabon just finished his new electric twin with retract trike gear. I worked with him on the design where we decided to use the 90 degree units for all three gear. Since Dave uses the KR Governor (which comes with the retract system already programmed) setting the retract system up was as simple as can be. Watched Dave fly the new ship two weeks ago. Very impressive!!! Amazing what getting rid of the drag from the gear does to improve the performance.

Since the Shark uses trike gear I would strongly suggest using a similar system. Of course that would necessitate switching from glow to electric power as the KR Governor is designed for electric power.

Eric Rule

Offline Bob Hudak

  • 25 supporter
  • Trade Count: (0)
  • Captain
  • *
  • Posts: 499
Re: Electric retracts for RSM Shark 45?
« Reply #5 on: February 13, 2017, 06:52:20 PM »
Skip,
 I'm almost positive you won't get away with tail drag gear on a classic ship that originally had trike gear at a classic contest. gotta be true to the original design.
I agree with the others that the Eflite 15 90 deg. retracts are your most reliable source. Not cheap but rock solid performance. I have a set on a Hunt F105 Thunderchief and never had a failure yet. Bob Hunt guided me along on the install. We both put installation pics on the all amped up forum. His procedure is shown on his Second Wind build thread. Do a search on these 2 planes and hopefully you'll find the answer to your need. One thing I might add, the gear weigh .9 oz. apiece without the wire or wheel. Build light!
                       Bob
350838

Offline Skip Chernoff

  • 21 supporter
  • Trade Count: (0)
  • Admiral
  • *
  • Posts: 1446
Re: Electric retracts for RSM Shark 45?
« Reply #6 on: February 14, 2017, 09:26:17 AM »
Thanks all.I'm gonna try to solve the nose gear retracting on the Shark.Would love to fly it in Classic.

BTW Eric just for fun I started building a Pinto this morning for our 1/2A day on March 5th. The kit is nice and I've got the wing framed out already. Being retired is great! PhillySkip

Offline Skip Chernoff

  • 21 supporter
  • Trade Count: (0)
  • Admiral
  • *
  • Posts: 1446
Re: Electric retracts for RSM Shark 45?
« Reply #7 on: February 15, 2017, 08:12:07 AM »
Hold on one second... Eflight offers 10-15 size and 15 -25 size  .Which "15" size do I buy?  Another thought ,stay with me on this....If I mounted the ST60 upright I'd have way more room for the nose gear unit underneath.... but if you mount the engine upright would it still classify for "Classic" ....how strict are the rules? Thanks guys PhillySkip

Offline john e. holliday

  • 25 supporter
  • Trade Count: (0)
  • Admiral
  • *
  • Posts: 22974
Re: Electric retracts for RSM Shark 45?
« Reply #8 on: February 15, 2017, 09:38:09 AM »
My self I would not object to an up right engine any more than I would electric.  The rules say you can change construction if you can't see the changes.  Exceptions are adjustable features as lead out guide and wing tip weight .  Also retractable landing gear was not on the original as I remember and I don't remember seeing one with retracts in that period of time.  If you are going to compete in a class, build for the class or type of event.  Otherwise build for modern stunt or just something to have fun with. D>K
John E. "DOC" Holliday
10421 West 56th Terrace
Shawnee, KANSAS  66203
AMA 23530  Have fun as I have and I am still breaking a record.

Online Trostle

  • 25 supporter
  • Trade Count: (0)
  • Admiral
  • *
  • Posts: 3389
Re: Electric retracts for RSM Shark 45?
« Reply #9 on: February 15, 2017, 11:14:04 AM »
Hey, you have two threads on this.  I will not repeat every thing I said in the Classic section where you asked if it would be allowable to fly a Shark with retracts in the Classic event.   The Classic rules are shown in that other thread.  You might find an ED that would allow it, but as explained in the other thread, that ED would not be following the "spirit of the event".  In fact, the PAMPA Classic rules state that "the substitution of a tricycle landing gear for a conventional gear, or vice versa" is not allowed.

Also mentioned in that other thread is that there are lightweight electric retracts available from at least one of the RTF RC manufacturers, maybe not as durable as the E-Flight systems, but definitely lighter.  They have a unit that rotates the gear 90 degrees as it retracts so the wheel lies flat.  These are on a small scale Corsair, among others.  Something to think about.

Keith

Rick_Huff

  • Guest
  • Trade Count: (0)
Re: Electric retracts for RSM Shark 45?
« Reply #10 on: February 15, 2017, 12:01:07 PM »
Skip,
I use E-flite 10-15 size retracts in my Pathfinder Twin, which weighs in at 67 oz.
Rick

Offline Mark Scarborough

  • 2015
  • Trade Count: (0)
  • Admiral
  • *
  • Posts: 5918
Re: Electric retracts for RSM Shark 45?
« Reply #11 on: February 15, 2017, 01:19:35 PM »
I would be aware that the Eflite retracts are good units, however the constant vibration from a beastly sT 60 may impact the reliablility,,

and as I said in the other thread, and Mr. Trostle mentioned, changing the gear config, including retracts will make it non compliant with the spirit of the event..

For years the rat race had me going around in circles, Now I do it for fun!
EXILED IN PULLMAN WA
AMA 842137

Offline Rich Perry

  • Trade Count: (0)
  • Commander
  • ****
  • Posts: 249
Re: Electric retracts for RSM Shark 45?
« Reply #12 on: February 15, 2017, 02:35:26 PM »
Unless they have changed the design, I would not recommend Eflite retracts.   I would go with robart spring down.  The limit switches are doomed to fail from vibration on the Eflites.  Unless you are using E power. 

Offline Dennis Moritz

  • 22 supporter
  • Trade Count: (0)
  • Admiral
  • *
  • Posts: 2485
Re: Electric retracts for RSM Shark 45?
« Reply #13 on: February 15, 2017, 03:39:55 PM »
Is electric power in the spirit of the event? I'd check with the CD of events you plan on flying. The use or non use of retracts is definitely a subjective valuation. Right now.

Offline Skip Chernoff

  • 21 supporter
  • Trade Count: (0)
  • Admiral
  • *
  • Posts: 1446
Re: Electric retracts for RSM Shark 45?
« Reply #14 on: February 15, 2017, 03:59:38 PM »
To all of you thanks so much for jumping in. I'd be building the plane for the fun and the challenge of doing it,but if it would not be allowed to compete in "Classic" I'll use the retract technology on some other project OR just fly the modified Shark in PA.

Rick it was your plane that got me thinking about the retract deal in the first place. I saw you flying at the Philly Fliers Stunt Meet two seasons ago and thought that the retract deal was very cool. Thanks for the inspiration. PhillySkip

Online Trostle

  • 25 supporter
  • Trade Count: (0)
  • Admiral
  • *
  • Posts: 3389
Re: Electric retracts for RSM Shark 45?
« Reply #15 on: February 15, 2017, 04:30:09 PM »

( Clip)

The use or non use of retracts is definitely a subjective valuation. Right now.

In the PAMPA rules for Classic Stunt, the use of retracts is not really "a subjective valuation".  The PAMPA Classic Stunt rules state that adjustable components "such as adjustable tip weights, leadouts and removable landing gear which allow the entrant to adapt to the contest site and conditions, are allowable.  This would not allow the substitution of a tricycle landing gear for a conventional gear or vice versa..."

As mentioned in a similar thread, unless there is proof that somebody flew a Shark with a retractable landing gear prior to 1970, a Shark equipped with such a retractable landing gear should not be allowed to fly in the Classic event.  Using a retracting gear in a Shark may or may not improve its performance, but the "appearance of the original" in the air with the gear retracted would definitely be changed.  You might find an ED who might give a "subjective valuation" and allow a Shark with a retracting gear to compete in the Classic Stunt event, but he would not be acting in "the spirit of the event" as per the rules for the event.

Keith

Offline Skip Chernoff

  • 21 supporter
  • Trade Count: (0)
  • Admiral
  • *
  • Posts: 1446
Re: Electric retracts for RSM Shark 45?
« Reply #16 on: February 15, 2017, 04:57:06 PM »
  Dennis M. was really pointing out that back in the day our "classic" planes were not flown with electric motors ...so are electric powered planes really in the spirit of the rules? It doesn't bother me what anybody flies with,but he does make a valid point. Which is more incorrect.... a Shark 45 with retracts or a Nobler with an electric power plant? This is an interesting discussion...to me at least.....Thanks,PhillySkip

Offline Dennis Moritz

  • 22 supporter
  • Trade Count: (0)
  • Admiral
  • *
  • Posts: 2485
Re: Electric retracts for RSM Shark 45?
« Reply #17 on: February 15, 2017, 05:35:01 PM »
Trostle referred to that infinitely subjective idea of "spirit of the event," when he opined that retracts were not appropriate. Everything follows, far as I can tell, from his judgement that retracts are not in the "spirit of the event." Seems to me many would judge electric power to be not be "in the spirit of the event." Yet. The dental drills are a flyin' in Classic and Old Time. Keith is making an opinion. Nothing hard and fast there. I would check with the CDs where you intend to fly. Get an opinion from them. If they judge that to be sufficiently in the spirit, they can state that is so.

Offline Dennis Moritz

  • 22 supporter
  • Trade Count: (0)
  • Admiral
  • *
  • Posts: 2485
Electric retracts for RSM Shark 45?
« Reply #18 on: February 15, 2017, 05:36:33 PM »
The use of retracts in Open at the NATS may also have bearing on interpretations for Classic. Electric power was not used and not available for Classic era and Old Time era planes, yet, they are currently allowed. Use in Open apparently grandfathered the power package in. Or. Whatever. Retracts, now that they have appeared in Open, can be similarly grandfathered in. Unlike electric power, which has many advantages over IC, the weight penalty incurred by retract gear may be more of a liability than the positive effect of a cleaner aerodynamic shape.

Offline Randy Cuberly

  • 21 supporter
  • Trade Count: (0)
  • Admiral
  • *
  • Posts: 3673
Re: Electric retracts for RSM Shark 45?
« Reply #19 on: February 15, 2017, 07:55:43 PM »
The use of retracts in Open at the NATS may also have bearing on interpretations for Classic. Electric power was not used and not available for Classic era and Old Time era planes, yet, they are currently allowed. Use in Open apparently grandfathered the power package in. Or. Whatever. Retracts, now that they have appeared in Open, can be similarly grandfathered in. Unlike electric power, which has many advantages over IC, the weight penalty incurred by retract gear may be more of a liability than the positive effect of a cleaner aerodynamic shape.


I would add to what Dennis said that many top fliers do not agree that Electric power has many advantages over IC power...at least not in terms of performance.

A good piped engine setup is at least the equal of any electric setup and better is some conditions.  Electric is probably better for "LAZY" people!

 y1 <= <= LL~ LL~ LL~

Phooey!

Randy Cuberly
Randy Cuberly
Tucson, AZ

Offline Mike Keville

  • AMA Member
  • Trade Count: (0)
  • Admiral
  • *
  • Posts: 2319
Re: Electric retracts for RSM Shark 45?
« Reply #20 on: February 15, 2017, 08:35:41 PM »
You do NOT want to imagine what I think about electric power in Old Time and/or Classic events . . . although you can probably guess.   LL~
FORMER member, "Academy of Multi-rotors & ARFs".

Eric Viglione

  • Guest
  • Trade Count: (0)
Re: Electric retracts for RSM Shark 45?
« Reply #21 on: February 15, 2017, 08:58:28 PM »
You do NOT want to imagine what I think about electric power in Old Time and/or Classic events . . . although you can probably guess.   LL~


Probably about the same as I feel when someone puts a small block chevy into a 32 Ford? ;)
EricV

Offline Randy Cuberly

  • 21 supporter
  • Trade Count: (0)
  • Admiral
  • *
  • Posts: 3673
Re: Electric retracts for RSM Shark 45?
« Reply #22 on: February 15, 2017, 09:00:32 PM »
Hey,
If electric is allowed in Classic then why not a Shark with a PA65 on a pipe?  Is that in the spirit of the event?

Or better yet a USA1 with a PA40 on a pipe!....Why not get really ridiculous!  

Randy Cuberly
Randy Cuberly
Tucson, AZ

Online Brett Buck

  • Trade Count: (0)
  • Admiral
  • ******
  • Posts: 14464
Re: Electric retracts for RSM Shark 45?
« Reply #23 on: February 15, 2017, 09:03:16 PM »
As mentioned in a similar thread, unless there is proof that somebody flew a Shark with a retractable landing gear prior to 1970, a Shark equipped with such a retractable landing gear should not be allowed to fly in the Classic event. 

     For good or bad, should or should not, as far as I can tell there is no provision for disqualifying someone from Classic. The penalty for deviation from the original is supposed to be Fidelity Points, but other than that, I don't think you can DQ anyone for any reason.

    I don't care much about Classic rules myself, but this is an issue of long standing, and I would think it would be ripe for some resolution.

      Brett

Offline Dennis Moritz

  • 22 supporter
  • Trade Count: (0)
  • Admiral
  • *
  • Posts: 2485
Re: Electric retracts for RSM Shark 45?
« Reply #24 on: February 15, 2017, 09:03:38 PM »
Yeah. A good piped engine run by an Expert Flyer with 30 years in Open. Electric is way easier to setup. Once setup it's way more consistent flight to flight. Weather conditions, power storage source, all that, not much of a variable.

Offline Dennis Moritz

  • 22 supporter
  • Trade Count: (0)
  • Admiral
  • *
  • Posts: 2485
Re: Electric retracts for RSM Shark 45?
« Reply #25 on: February 15, 2017, 09:08:06 PM »
It could be argued that if anyone used retracts at any time in any plane prior to the Classic date cutoff, the retracts would qualify. Brett stated the overriding situation clearly. Rules are informal, not all spelled out. It's a fun event. I don't think Chip will set a trend. Novelty is interesting.

Offline Randy Cuberly

  • 21 supporter
  • Trade Count: (0)
  • Admiral
  • *
  • Posts: 3673
Re: Electric retracts for RSM Shark 45?
« Reply #26 on: February 15, 2017, 09:13:10 PM »
Yeah. A good piped engine run by an Expert Flyer with 30 years in Open. Electric is way easier to setup. Once setup it's way more consistent flight to flight. Weather conditions, power storage source, all that, not much of a variable.

Actually, Bad Weather Conditions seems to be where IC really has an advantage.  A good IC piped setup is in credibly consistent flight to flight and in fact month to month and even year to year with far less maintenance required than an electric setup!

I'll say it again (with over 50 years in expert...Phooey!  You're selling a bill of goods to those who don't know any better!

Electric can be about as good as IC under most conditions but to call it better or easier is pure bunk!

Randy Cuberly
Randy Cuberly
Tucson, AZ

Online Brett Buck

  • Trade Count: (0)
  • Admiral
  • ******
  • Posts: 14464
Re: Electric retracts for RSM Shark 45?
« Reply #27 on: February 15, 2017, 09:43:00 PM »
Yeah. A good piped engine run by an Expert Flyer with 30 years in Open. Electric is way easier to setup. Once setup it's way more consistent flight to flight. Weather conditions, power storage source, all that, not much of a variable.

    The answer is not the same for all skill levels, that's for sure. If you are talking about Open fliers with 30 years of experience, you have to compare electric and IC between those guys, and separately compare electric and IC among intermediate fliers.

     From what I have seen, in some conditions (like Golden State 2015 and more particularly 2015 NATS Top 20 day - both with strong but very smooth air), I would say that a perfect-running IC system is probably still better, marginally. In a lot of other conditions, particularly in dead air, electric is probably substantially better, assuming everyone knows what they are doing. In either case, it appears to be a function of the (still unexplained) generally heavy line tension for a given airspeed, it's a bonus in very light  to non-existent air, and a negative in really strong but smooth air.

    For the less-skilled, particularly beginners and intermediates, the results will depend almost entirely on how either system is set up, and the difference in the ultimate potential is irrelevant. The guys that can mess up IC engines seem to be able to mess up Electric with about the same degree of success or failure, for some reason. I also see a lot of the same sort of "local experts" developing for electric as I do for IC engines, with the expected (bad) results.

     And not to flog the dead horse, but the learning curve for either system appears to be steep, and also appears to have yawning chasms where people go backwards for a while after they have been doing it. For IC engines, it's the point that people get it in their heads to start modifying or adjusting or "tweaking" the engines, or buying modified engines, which is almost always a mistake, which takes a while to realize. I haven't paid enough attention or know enough about it to explain why the same thing happens with electric - I suppose it is the "if you can adjust it, you can adjust it wrong" effect but I don't know what the mechanism is.    

    The people who avoid this are those with turn-key engine setups that they don't "improve" - like a stock "new" 25LA.

      Brett
« Last Edit: February 15, 2017, 11:33:57 PM by Brett Buck »

Offline Dennis Moritz

  • 22 supporter
  • Trade Count: (0)
  • Admiral
  • *
  • Posts: 2485
Re: Electric retracts for RSM Shark 45?
« Reply #28 on: February 15, 2017, 10:53:35 PM »
Electric systems done by folks who know what to do work well and are repeatable. They can suggest what to buy and show how to set up so that the less experienced and ham handed can have effective power. In our club Mike tells you what to buy and how to set it up. If you follow his advice, the system works. Results are reliable and repeatable.

ICs vary according to conditions. Trouble shooting ICs can be difficult and frustrating, at times unsolvable. I'm thinking, among other things, of mystical magical bad vibes. IC is never plug and play. Electric can be. IC requires that a pilot have a "feel" something like an intuitive connection. Luckily my club has a few folks with that feel. They have vast experience. Their engines, all kinds of engines, work.  I have learned a great deal from them. I am still learning and at times stumped. Many offer advice, not many offer advice that solves an issue.

Mike Palko said he went to electric so that he didn't have to keep listening to the engine, deciding if the engine setting was optimum, even good enough. Electric freed him up to solely concentrate on flying the plane.

I only fly IC. Certainly a genetic anomaly.


Online Brett Buck

  • Trade Count: (0)
  • Admiral
  • ******
  • Posts: 14464
Re: Electric retracts for RSM Shark 45?
« Reply #29 on: February 15, 2017, 11:32:27 PM »
Electric systems done by folks who know what to do work well and are repeatable. They can suggest what to buy and show how to set up so that the less experienced and ham handed can have effective power. In our club Mike tells you what to buy and how to set it up. If you follow his advice, the system works. Results are reliable and repeatable.

   Which is exactly what you get with an IC engine if you do the same thing, at least a modern IC engine that is know to be good.  I can tell someone exactly what to do to get endless perfect runs from the 20FP, and if they follow the directions, that's what will happen. But search for endless references to 20FP and my endless despair when someone complains it doesn't work, then I find ST needles, venturi-chart venturis, chip mufflers, 10-6 Rev Ups, time after time after time.

    Same thing to a lesser extent the same thing with the RO-Jett 61 "Brett" version, which if you follow the directions is the same thing. So far, exactly *one* guy that I know of actually set up his engine exactly like mine, aside from a bad can of fuel, it worked exactly like mine - and then went to the WC and finished high in Junior a few weeks later. I know that Richard Oliver had an engine returned as "unworkable" - so he set it up in his airplane, and beat the former owner with it at a local contest a few weeks later.

    As far as I can tell, the only thing I have found more trouble-prone with IC is that every other sport flyer you run into fancies himself an "engine expert" and knows far better than your experts with 40 years of experience at the highest levels. For electric, right now it seems to be only about every fourth guy who considers himself an "electric expert", and usually they got it in RC. That alone probably doubles the chances of success with electric, so maybe you have a point.

I am sure, given time, that the soldering iron will replace the Dremel tool as a "extra-special-stunt-motor-for-lucky-best-stunt-run" hop up tool.

     Brett

    
« Last Edit: February 16, 2017, 08:51:29 AM by Brett Buck »

Online Trostle

  • 25 supporter
  • Trade Count: (0)
  • Admiral
  • *
  • Posts: 3389
Re: Electric retracts for RSM Shark 45?
« Reply #30 on: February 16, 2017, 12:27:35 AM »
Trostle referred to that infinitely subjective idea of "spirit of the event," when he opined that retracts were not appropriate. Everything follows, far as I can tell, from his judgement that retracts are not in the "spirit of the event." Seems to me many would judge electric power to be not be "in the spirit of the event." Yet. The dental drills are a flyin' in Classic and Old Time. Keith is making an opinion. Nothing hard and fast there. I would check with the CDs where you intend to fly. Get an opinion from them. If they judge that to be sufficiently in the spirit, they can state that is so.

Granted, I am stating an opinion.  The rules for both Classic and OTS speak of "the spirit of the event".  I will stand by my "opinion" that retracts for Classic are not within "the spirit of the event" and I think some, maybe not all, ED's would not allow that.  Now, we can go back in history and find that there was an article in the British Aeromodeller magazine in 1949 for electric powered* control line models.  So, there is justification, regardless of the rules or opinionated interpretation of the rules, to use electric power for our toy airplanes, even for OTS models.  I think it is fortunate that electric has not evolved into the OTS circles.  Evolution has given us electric power in the Classic event to be more or less accepted even though many still feel that it is not within "the spirit of the event".  I can imagine that it will only be a matter of time that electric OTS models will be accepted much the same way it has been accepted in Classic.  Now, we can go to the question about tuned pipes in Classic.  It has been done, in fact a piped Chizler was flown at VSC some time ago after a survey of some pilots asking if they would object.  No "formal" objections were made among those competing, but there was some "discontent" and that particular arrangement was subsequently never flown again in competition.   I think to this day, that most will consider or have the "opinion" that a piped system is not in "the spirit of the event".  There has not been any migration to allow or to use pipes in the Classic event.

The Classic rules are somewhat convoluted and not faithfully adhered to in several areas.  In one case, the rules state:

"It is expected that contestants will comply with the spirit of the event and enter only qualifying models which as closely as possible accurately reflect the aerodynamic layout and appearance of the original.  In order to assist the judges, it is suggested that contestants provide reasonable proof that the model presented was actually flown during the period of eligibility as defined in Paragraph 1, and that the model accurately represents the model as flown during that period."

I have never seen contestants "provide reasonable proof that [his] model presented was actually flown during the period of eligibility" in a Classic contest though the rules encourage such.

In my "opinion" that does not leave much room for justification to use retracts when retracts were not used on the design prior to 1970 though electrics are now commonly used in Classic stunt.  Granted, use of electrics do not change the "aerodynamic layout and appearance of the original".

In another case, the Classic rules provide for a concept called "fidelity points".

"Fidelity points from 0 to 20 will be awarded for fidelity to the concept of the original design and confirmation of the spirit of the event.  Obvious and/or gross distortions of the original design of any eligible model in order to gain an actual or perceived performance advantage over the original design will also be subject to reduction of fidelity points.  Again the decision as to the level of distortion and the penalty appropriate for such will be at the discretion of the on-site official and not subject to dispute."  Fidelity points have seldom been awarded, if at all, in the Classic Stunt event.  Award of such fidelity points would either require considerable documentation by the contestant or require vast amounts of detailed knowledge/awareness by the "on-site" officials of what was flown prior to 1970.  I have seen some cases where what could be called "stretches" of the rules in Classic which have been handled by deduction of what could have been received by the appearance judging.

Some purists feel that the "spirit of the event" should require only period engines, period wheels, period materials, period finishing methods and on and on.  Some who participate in OTS enjoy doing things this way, but that does not dictate how most choose to participate in the event.  I will admit, the demarcation between what is and what is not within the spirit of the event gets fuzzy.

Mr. Moritz can play with words all he wants, but in my "opinion" retracts on a Classic ship that did not originally employ retracts is still definitely not within the "spirit of the event".

Keith

*Note:  The March 1949 Aeromodeller magazine had an article for "Electric 'U' Control".  A battery was held by the pilot and current run down insulated lines to the electric motor in the model.  Probably not very practical, but it was done.


Offline Robertc

  • Trade Count: (0)
  • Commander
  • ****
  • Posts: 307
Re: Electric retracts for RSM Shark 45?
« Reply #31 on: February 16, 2017, 07:46:36 AM »
Unless I missed it, you can use retracts on your Shark and fly in Classic with the gear down, then fly in Pampa with the gear up.

Offline john e. holliday

  • 25 supporter
  • Trade Count: (0)
  • Admiral
  • *
  • Posts: 22974
Re: Electric retracts for RSM Shark 45?
« Reply #32 on: February 16, 2017, 09:26:05 AM »
I would let that go.  But up right engine in any design other than the original Veco Thunderbird or Smoothie would not be allowed if not designed for it.
John E. "DOC" Holliday
10421 West 56th Terrace
Shawnee, KANSAS  66203
AMA 23530  Have fun as I have and I am still breaking a record.

Offline Dennis Moritz

  • 22 supporter
  • Trade Count: (0)
  • Admiral
  • *
  • Posts: 2485
Re: Electric retracts for RSM Shark 45?
« Reply #33 on: February 16, 2017, 09:42:14 AM »
"I think it is fortunate that electric has not evolved into the OTS circles."  

The Prez of PAMPA flies electric in Ole Time. Impressive plane. Won Brodak year before last. Chip, I believe, is preparing for the Big B. Yep. He certainly can fly with gear down.

Ahh. The inviolable opinions of Mr. Trostle.


Sent from my iPhone using Tapatalk

Offline Dennis Moritz

  • 22 supporter
  • Trade Count: (0)
  • Admiral
  • *
  • Posts: 2485
Re: Electric retracts for RSM Shark 45?
« Reply #34 on: February 16, 2017, 10:03:24 AM »
Electric power is not subject to many issues that cause an IC engine to have a bad day. IC variations can happen due to:  temperature, air pressure, fuel, plugs, tanks, relative wear of the engine, sensitivity to prop selection (the magic props that load engine to assist flying style), bad vibes due to bad harmonics inherent in a given build, failure of the pilot to set the needle at precisely the happy click. The happy click point often will vary. Even during a day. And. Other stuff arcane and as yet to be discovered.

Online Brett Buck

  • Trade Count: (0)
  • Admiral
  • ******
  • Posts: 14464
Re: Electric retracts for RSM Shark 45?
« Reply #35 on: February 16, 2017, 10:06:27 AM »
You do NOT want to imagine what I think about electric power in Old Time and/or Classic events . . . although you can probably guess.   LL~


   I don't have to guess, of course!

    As long as you are letting people use absolutely any engine they want, including replacing Ohlsson 23s with Aero-Tiger 36s with $57 Australian props, it's pretty tough to ban electric on a purist argument. Or at least there should be severe cognitive dissonance - just like when several of us were arguing for a rolling cutoff and various other notable personages argued about the pure majesty of the event being destroyed. And the next morning they went out to the L-pad and fired up their PA51 SE.

     A mere 25LA in a Dolphin or an Ares will work a hell of a lot better and make a bigger difference in the results than any electric.

   As above, I don't care that much about OTS and Classic rules, but if you want a pure event, I would think you would want to resolve what you really mean by "pure" first, then change things accordingly. Permitting modern engines and props makes a far bigger difference than electric.

     Brett

  

Offline Dennis Moritz

  • 22 supporter
  • Trade Count: (0)
  • Admiral
  • *
  • Posts: 2485
Re: Electric retracts for RSM Shark 45?
« Reply #36 on: February 16, 2017, 10:20:33 AM »
Modern engines are a given. Tho, I know of an engine first manufactured in 1950, that wins often in OT. My quote of Mike Palko is accurate. He won with IC before he switched. Got the bilge spillers to behave. I think his opinion should hold weight. The father of electric powered stunt (before he shaved every day) is widely respected and very accomplished. I have no oar in this debate. Just speaking about what I have seen with my own lying eyes over the last 15 or so years. Despite what I perceive to be the advantage of electric (especially so for myself, who often experiences IC weirdness) I am inveterate and stubborn. Cranking the noisy stink pots. Love isn't easy. Often it is a trial and tribulation with moments of ecstasy.

« Last Edit: February 16, 2017, 10:56:39 AM by Dennis Moritz »

Online Brett Buck

  • Trade Count: (0)
  • Admiral
  • ******
  • Posts: 14464
Re: Electric retracts for RSM Shark 45?
« Reply #37 on: February 16, 2017, 10:34:29 AM »
Electric power is not subject to many issues that cause an IC engine to have a bad day. IC variations can happen due to:  temperature, air pressure, fuel, plugs, tanks, relative wear of the engine, sensitivity to prop selection (the magic props that load engine to assist flying style), bad vibes due to bad harmonics inherent in a given build. And. Other stuff arcane and as yet to be discovered.

    It's not nearly as prone to issues as you make it out to be, and there are certainly answers to any of these issues. That you do not know about any of them is no surprise. If it seems like you have to change prop/fuel/venturi/head gaskets/pipe length/plugs on a regular basis, that means you don't have a good system setup, not that it is intrinsically difficult. I am still running the same prop I ran in 2006, and I am still running the same pipe length I ran in 1999. I probably couldn't even get the coupler off at this point.

   I am not faulting you or anyone else for not knowing that, you don't have anything like the necessary experience to figure it out. Of course, you won't listen to those with vastly more experience and you seem to have taken it as your life's goal to try to naysay anything from people who do know.  Just above, you are contradicting (not arguing) technical points of *Keith Trostle* (who has operated at the highest levels for something like HALF A CENTURY and is know to be one of the most accomplished modelers regardless of the event - how many people have won National Championships in multiple events?), and you have demonstrated over an over you know virtually *nothing* about the topic.

     Brett

    

Offline Dennis Moritz

  • 22 supporter
  • Trade Count: (0)
  • Admiral
  • *
  • Posts: 2485
Re: Electric retracts for RSM Shark 45?
« Reply #38 on: February 16, 2017, 11:02:00 AM »
Brett. Please. I have folks around me who are nearly as accomplished as you. Who have built and flown and made work many planes since 2006. Both electric and internal combustion. You bet I listen to them and seek their advice. You're wrong, often wrong, about a lot of things. Show very little inclination or ability to moderate and come off it.

Offline Dane Martin

  • 21 supporter
  • Trade Count: (0)
  • Admiral
  • *
  • Posts: 2804
  • heli pilot BHOR
Re: Electric retracts for RSM Shark 45?
« Reply #39 on: February 16, 2017, 11:29:25 AM »
Electric power is not subject to many issues that cause an IC engine to have a bad day. IC variations can happen due to:  temperature, air pressure, fuel, plugs, tanks, relative wear of the engine, sensitivity to prop selection (the magic props that load engine to assist flying style), bad vibes due to bad harmonics inherent in a given build, failure of the pilot to set the needle at precisely the happy click. The happy click point often will vary. Even during a day. And. Other stuff arcane and as yet to be discovered.

I only travel the country for contests. There are no contests in Las Vegas, or anywhere else in Nevada. I only fly with IC engines. I have none of these problems listed. I don't use the same prop in Texas that I use in Las Vegas on an la25, but not really difficult to take care of.

Offline Target

  • C/L Addict
  • 2019 supporter
  • Trade Count: (0)
  • Admiral
  • *
  • Posts: 1692
Re: Electric retracts for RSM Shark 45?
« Reply #40 on: February 16, 2017, 01:07:40 PM »
Skip/Trostle/Others-

You may or may not have thought of this, but I'll spit it out-

What if Skip built the Shark with proper placed gear, and retractable, but for a "Classic" event, he just disabled the retract function and left the gear down the entire flight??
Would that not be acceptable, within the spirit of the contest rules?
I would think that would allow him to build the plane he wants with retracts, and still allow it to be contest legal.

But, I'm a newbie here, and don't know anything, even what I do know, LOL.

Regrettably,
Chris Behm
Regards,
Chris
AMA 5956

Online Trostle

  • 25 supporter
  • Trade Count: (0)
  • Admiral
  • *
  • Posts: 3389
Re: Electric retracts for RSM Shark 45?
« Reply #41 on: February 16, 2017, 01:46:43 PM »
Skip/Trostle/Others-

You may or may not have thought of this, but I'll spit it out-

What if Skip built the Shark with proper placed gear, and retractable, but for a "Classic" event, he just disabled the retract function and left the gear down the entire flight??
Would that not be acceptable, within the spirit of the contest rules?
I would think that would allow him to build the plane he wants with retracts, and still allow it to be contest legal.

But, I'm a newbie here, and don't know anything, even what I do know, LOL.

Regrettably,
Chris Behm

Hi Chris,

This has has already been suggested.  In my "opinion", there would be no problem with installing retracts and using them in a Shark and flying it in a regular CLPA contest.  There is nothing in the rules that would otherwise prevent the use of the retracting process and then use that Shark in the Classic event by not retracting the gear.  Also, the LG could be modified to a conventional gear for CLPA events instead of the tricycle to simplify the problem of otherwise needing to retract a nose gear.

As far as using the Shark in the Classic Stunt event with the tricycle gear and the LG is not retracted, in my "opinion", it makes no difference how that landing gear is attached to the airplane when the gear is not retracted.  Now, if a conventional gear replaces the Shark tricycle gear, that is specifically forbidden in the Classic Stunt rules and could not be used in the Classic event.  This is NOT my "opinion", but is clearly written in the Classic Stunt rules.

Keith

Offline Target

  • C/L Addict
  • 2019 supporter
  • Trade Count: (0)
  • Admiral
  • *
  • Posts: 1692
Re: Electric retracts for RSM Shark 45?
« Reply #42 on: February 16, 2017, 02:53:55 PM »
Yep, that seems like a simple solution, if the gear configuration is legal locked down for classic, build it that way adding retracts, but then disable them for the classic contest.
Seems like the best solution to me.
Regards,
Chris
AMA 5956

Offline Dennis Moritz

  • 22 supporter
  • Trade Count: (0)
  • Admiral
  • *
  • Posts: 2485
Electric retracts for RSM Shark 45?
« Reply #43 on: February 16, 2017, 08:52:21 PM »
Yep. I've had la25s that ran like that. One on an Arf Streak. Flew it for a season until the nose fell off. Stock engine. Set up pretty much as Brett suggests. After the nose fell off I reinforced the nose. Made it out of a solid piece of balsa. Unlike the original full of empty spaces. Engine stopped running like a clock. Irregular run. Tank was checked and ok. Obvious stuff looked at. The engine had not been crashed. Plane landed. Engine fell off. Turned out there was a vibration issue. Took weeks to get stuff stabilized. Knowledgeable folks helped. Different ideas were tried. Not atypical. If I was troubleshooting by myself doubt I would have figured stuff. I was barraged by advice. Much of it the bad advice Brett talks about. I didn't listen to that. Instead I worked with fliers whose stuff I saw work.

That was early on. Since then there have been many difficult moments getting I C engines to perform well. Luckily I've friends with wide experience who are skilled and effective.


Sent from my iPhone using Tapatalk

Offline Skip Chernoff

  • 21 supporter
  • Trade Count: (0)
  • Admiral
  • *
  • Posts: 1446
Re: Electric retracts for RSM Shark 45?
« Reply #44 on: February 16, 2017, 09:34:32 PM »
Based on everyone's suggestions and listening carefully to everybody's opinions I have decided to do the following: I'm going to build the Shark with retracting tricycle gear (e-flite 10-15 size) but I have decided not to use the ST 60. I'm going to go electric on this one. (my first). By going electric it solves a number of problems. First, it gives me room in the nose to mount the nose unit and won't have to worry about the vibrations put out by the ST. Secondly, I won't have to do the 2.4 stuff and I'll get a timer set up for retracts. Lastly ,I like the idea of flying
 Classic with the gear locked down and PA with the gear retracted. Makes sense to me. This plane probably won't be ready for this season but that's not an issue, as I've got plenty of planes to fly. Again, thanks to all for jumping in......Your Pal,PhillySkip

Offline Jim Oliver

  • 25 supporter
  • Trade Count: (0)
  • Admiral
  • *
  • Posts: 1414
Re: Electric retracts for RSM Shark 45?
« Reply #45 on: February 16, 2017, 09:38:49 PM »
Skip,

You probably made a good decision to go Epower.  My RC buddies have had many problems with the Eflite nose units due to vibration.

Fewer problems with the mains but the nose units don't last very long.
Jim Oliver
AMA 18475

Offline Skip Chernoff

  • 21 supporter
  • Trade Count: (0)
  • Admiral
  • *
  • Posts: 1446
Re: Electric retracts for RSM Shark 45?
« Reply #46 on: February 16, 2017, 10:12:26 PM »
Jim,I'll start gathering up the needed stuff and get going on the project. Should be fun! I'll post pics as it progresses.I had a really nice phone conversation today with Bob Hunt about the project. He was very helpful and supportive.  PhillySkip

Online Trostle

  • 25 supporter
  • Trade Count: (0)
  • Admiral
  • *
  • Posts: 3389
Re: Electric retracts for RSM Shark 45?
« Reply #47 on: February 17, 2017, 12:21:06 AM »
Brett. Please.

(Clip)

 You're wrong, often wrong, about a lot of things. Show very little inclination or ability to moderate and come off it.

Now, who is expressing an "opinion", and then have nothing to back it up other than a vain attempt at character assassination?  Your comment is totally uncalled for and has no place on this forum.  Sort of gives some insight on who you really are.

Keith
 

Online Howard Rush

  • 25 supporter
  • Trade Count: (0)
  • Admiral
  • *
  • Posts: 7966
Re: Electric retracts for RSM Shark 45?
« Reply #48 on: February 17, 2017, 12:49:43 AM »
Mike Palko said he went to electric so that he didn't have to keep listening to the engine, deciding if the engine setting was optimum, even good enough. Electric freed him up to solely concentrate on flying the plane.

I had a comparable experience transitioning from LPs to CDs.  I haven't completely gotten over listening for anomalies.  I went to a live concert Tuesday and thought I heard distortion in the piano. 
The Jive Combat Team
Making combat and stunt great again

Online Brett Buck

  • Trade Count: (0)
  • Admiral
  • ******
  • Posts: 14464
Re: Electric retracts for RSM Shark 45?
« Reply #49 on: February 17, 2017, 02:26:57 AM »
Brett. Please. I have folks around me who are nearly as accomplished as you. Who have built and flown and made work many planes since 2006. Both electric and internal combustion. You bet I listen to them and seek their advice. You're wrong, often wrong, about a lot of things. Show very little inclination or ability to moderate and come off it.

    I am indeed sometimes, possibly even often, wrong. I sincerely doubt that you could tell when. In fact, if I am so wrong so often you should be really easy for you to point out the specific flaws in my engineering, experimental observations,  and reasoning  - without resorting to broad and vague generalizations about my emotional state or defects. 

      You pick the topic, any topic.  Can you explain in any detail at all why my reasoning is wrong? If it's so glaring, you should easily be able to explain how it's wrong. In fact,  I made at least one really obvious mistake in the last month or so, see if you can identify it, and then explain why it was wrong and what I suggested was incorrect -  without resorting to emotional outbursts, referring to guys you know/name dropping, or name-calling.
 
       In any case, I was talking about *you*, not your buddies. I presume you mean, among others, Dan Banjock and Mike Palko - real modelers who actually know something. And hey, guess what, they aren't desperately trying to inject themselves into every discussion to make themselves relevant. In fact, I do listen to them and value their opinion. Because they actually *are* relevant and well respected on their own merits.  And they usually make sense. Might want to pay a little more attention to how they conduct themselves, you indeed could learn a lot.

   Mike does things. Dan does things. At best, you also happen to be present. 

     Brett

p.s. As an aside, I never thanked you for accosting me at the NATs with your ridiculous "gotcha" (which didn't make a lick of sense)- which, as I recall, was after I spent all day judging Classic. I have to admit, I was tired and not in the mood for playing your game, and hey, you did get my goat for 45 seconds. Congratulations, that was your greatest NATS accomplishment to date.

Tags: