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Author Topic: 15 size FJ4  (Read 2510 times)

Offline Bob Reeves

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15 size FJ4
« on: July 27, 2010, 09:02:52 AM »
Started designing the 15 version of my FJ4 and this is what I have so far. Still have allot of details and notes to add to it but the major pieces are done. 32 inch wing span, 212 sq/inches, 23 inch fuselage and will be powered with a 15 FP. The line going out to the wing tip is the CG at 25% MAC. Am sure just like it's big brother it will need tail weight.


Offline john vlna

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Re: 15 size FJ4
« Reply #1 on: July 27, 2010, 09:21:32 PM »
Bob,
Looks neat, hope we see it at Brodaks next year. You and Bob Crusan can do a Korean war  multiflight, he has a real nice F9F Panther that is 15 size. He flew it in 2009 in carrier.
john

Offline wwwarbird

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Re: 15 size FJ4
« Reply #2 on: July 27, 2010, 10:39:18 PM »
 Cool! How is the big one flying?
Narrowly averting disaster since 1964! 

Wayne Willey
Albert Lea, MN U.S.A. IC C/L Aircraft Modeler, Ex AMA member

Offline Bob Reeves

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Re: 15 size FJ4
« Reply #3 on: July 28, 2010, 07:19:22 AM »
Cool! How is the big one flying?

Thanks, Big one is flying as well as can be expected for it's size. Having a little trouble with it being blown around by wind which kills the low speed time. Best I've been able to do is just over 200 which won't win any hardware. Part of it is my inabilities plus it really needs a line slider. I still love it, it's allot of fun to fly and a real attention getter. After I get the 15 built I have a Brodak Guardian kit I'm going to kit bash into a version between the two with a slider. Hope to have all 3 at Brodaks next year.

Offline john e. holliday

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Re: 15 size FJ4
« Reply #4 on: July 28, 2010, 08:00:08 AM »
Hey, don't sneeze at 200,  I am doing good to even get close.  Might need plans for the .15 version for the Cox I have.   H^^
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 Bob Reeves

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Re: 15 size FJ4
« Reply #5 on: July 28, 2010, 09:38:01 AM »
Hey, don't sneeze at 200,  I am doing good to even get close.  Might need plans for the .15 version for the Cox I have.   H^^

Thanks Doc. After I get the plans finished anyone that wants the CAD file is welcome to it. Should be able to get prints made at Kinko's or one of it's competetors. If I can get in the right mood after the airplane is built I might do an article for CL World. That is a long way down the road but you never know...

Offline john e. holliday

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Re: 15 size FJ4
« Reply #6 on: July 29, 2010, 09:03:59 AM »
The magazines are looking for anything they can get that is well written with photos.  Let me know about the plans. H^^
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 Paul Smith

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Re: 15 size FJ4
« Reply #7 on: July 29, 2010, 09:54:30 AM »
I'll share a trade secret here.

At The Brodak you get a 10 point bonus for using Brodak kit (design) in 15 Profile and Sportsman Profile. If you look at the winning scores, you will see that 10 points is a big deal.  I like designing my own planes, too, but points is points, so I use a Brodak Junior Lightening Streak and a Brodak Super Clown in these events.

According to the rules, the only bonus in Sportsman is the Brodak bonus.  I heard rumor that, despite the published rules, you get both the Brodak bonus and the scale bonus in Sportsman class if you use Brodak's Skyraider or Bearcat.  Maybe if the organizer reads this we can get an answer.

Maybe you could sell your Fury designs to Mr. Brodak by next June and thereby qualify for the 10 points.

If you use a slider, it can only go back to the trailing edge of the ROOT CHORD.  Thus a swept wing like the FJ Fury would be a bad bet.  This rule is one reason why successful "slider designs" are limited to a short list of prototypes.
Paul Smith

Offline Bob Reeves

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Re: 15 size FJ4
« Reply #8 on: July 29, 2010, 02:30:17 PM »
That really promotes new and innovative designs doesn't it.  ???

I have more to say but hate typing on this laptop....

Offline Paul Smith

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Re: 15 size FJ4
« Reply #9 on: July 29, 2010, 03:49:56 PM »
Sad but true.

The current rules favor planes from the 1935-to-1945 era, with the MO-1 composing the majority of models and the VAST majority of winner and record holders.  Planes like the MO-1 that were slow like turtles, fly closer to the actual speed of models and get more carrier points. 

The jet age, from 1946 to present, a full 65 years is largely absent, with the expecption a few models like yours, built because you like the subject, and giving up serious hope of winning.  Jet fighters that were designed to go 500+ MPH aren't all that hot for going 90 high and 10 low.

I've often thought of the idea of origianating a Jet-25 Event limited to jet fighters with one of the readliy available .25 cubic inch engines.  All of these "old time", "classic" and "nostalgia" things, as you say, don't leave much for today's designer.
Paul Smith

Offline Dennis Holler

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Re: 15 size FJ4
« Reply #10 on: July 29, 2010, 08:23:03 PM »
Maybe there should be a class for jets S?P

I always liked the potential of  "carrier combat"  Two decks 180 degrees apart, two contestants each with a flour bomb and a streamer.  Object would be to get points for take off, landing, bombing the other carrier and of course fighting the other plane, but would be nice it the combat somehow structured or limited so its not just a carryover from the combat circles.  It probably wouldn't work, I keep going through it in my mind LL~ LL~ LL~ LL~
I've started plenty...would be nice to finish something!!!

Offline john e. holliday

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Re: 15 size FJ4
« Reply #11 on: July 30, 2010, 10:45:07 AM »
Paul,  remember that there are no sliders in .15 carrier. H^^
John E. "DOC" Holliday
10421 West 56th Terrace
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AMA 23530  Have fun as I have and I am still breaking a record.

Offline john vlna

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Re: 15 size FJ4
« Reply #12 on: July 30, 2010, 06:14:10 PM »
Doc,
Sliders are illegal in 15 profile, the only component allowed to move is the hook release

Offline john vlna

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Re: 15 size FJ4
« Reply #13 on: July 30, 2010, 06:16:18 PM »
Personally I like 15 and Nostalgia best because of the no slider rule, now if we could go back to realistic flying.

Offline Wayne J. Buran

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Re: 15 size FJ4
« Reply #14 on: July 30, 2010, 08:05:12 PM »
Personally I like 15 and Nostalgia best because of the no slider rule, now if we could go back to realistic flying.

John, you speak "Heresy"!
Wayne
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Offline john vlna

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Re: 15 size FJ4
« Reply #15 on: July 30, 2010, 08:23:32 PM »
Wayne,
I know I do, Maybe the way carrier is flown is why there isn't a lot of activity. Eliminating sliders ( movable leadouts) would make it like 15, you could hang if you want to pay the penalty in high speed or not , your choice. Most of the time 15  score are very close, usually determined by  the landing.
john

Offline mike hartung

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Re: 15 size FJ4
« Reply #16 on: August 01, 2010, 02:35:11 PM »
Yes Bob I also would be interested in a set of plans for the .15 size FJ. Your plane is super cool.
blue skys and tail winds to all.

Offline roger

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Re: 15 size FJ4
« Reply #17 on: August 02, 2010, 11:48:05 AM »
yeah bob i to would like a set
roger #^

Offline Douglas Ames

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Re: 15 size FJ4
« Reply #18 on: October 24, 2010, 03:18:40 PM »
Sad but true.

<snip>
I've often thought of the idea of originating a Jet-25 Event limited to jet fighters with one of the readily available .25 cubic inch engines.  All of these "old time", "classic" and "nostalgia" things, as you say, don't leave much for today's designer.
[/b]

That holds very true for Stunt also...
I'm in the same boat as Bob. I'm finishing up a .15 Corsair with a little excessive engineering. Too much drag?, maybe. Too heavy?, we'll see... Innovation should never be judged as noncompetitive until thoroughly tested.
AMA 656546

If you do a little bit every day it will get done, or you can do it tomorrow.

Joe Just

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Re: 15 size FJ4
« Reply #19 on: October 25, 2010, 09:10:06 AM »
Wayne,
I know I do, Maybe the way carrier is flown is why there isn't a lot of activity. Eliminating sliders ( movable leadouts) would make it like 15, you could hang if you want to pay the penalty in high speed or not , your choice. Most of the time 15  score are very close, usually determined by  the landing.
john
John, heresy?  Perhaps, but every poll taken since 1995 indicates that the only people loving the 60 degree rule are those flying now.  I wish I had kept all the notes, letters and emails I have received since 95 indicating personal near hatred of the 60 degree rule. Last year i gave away or sold at near cost nearly 40 .15 size ships.  I also passed on about 30 of my simplified handles and almost 75 of my cheapish 3-line bellcranks.  All this indicates that there is a bunch of interest in carrier simplicity (is that a legitimate word?)  While i am really not enamored with 10 or 12 divisions of carrier competition  as we have it now through the NCS "Top 20"  I do feel that some major changes are in store, which by right should not eliminate anyones interest such as 60 degree flight.  Skill levels may be an answer.  In the early to mid 90's there were two studies made to look at possible skill classes. Nothing came of it.  What do you think?


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