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Author Topic: Trophy Trainer/OS .46LA  (Read 2434 times)

Offline Bill Little

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Trophy Trainer/OS .46LA
« on: August 25, 2011, 11:57:56 PM »
We are nearing the end on building Aaron's TT from UHP (??) plans.  We have set it up for an OS .46LA which I understand could make it fairly nose heavy.

Anyone have experience with this plane/set up?  The model does have a fairly long nose and it seems to me that a nose heavy condition could/will exist when finished.  We took some extra pains using a built up profile fuselage (many of his models have come out tail heavy) to ensure a fairly light tail.

Thanks!
Big Bear
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Offline dennis lipsett

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Re: Trophy Trainer/OS .46LA
« Reply #1 on: September 05, 2011, 04:50:59 PM »
Bill,
Just a heads up on fuel consumption. The 46 is one thrifty engine when broken in and will do the pattern on 4 oz or less depending on humidity and temperature. On the really high humidity days i was using 3.5 oz for the parrern with 3 laps left after the completion. As i'm also on the east coast and probably not more then 600 feet above sea level I don't think that your results will be very different. So at least you wont have to carry around 5 or more oz to get through the pattern. I did have an almost 9 minute flight at a meet with 4 oz of fuel 90 + degrees and 52% humidity. It killed me literally.
dennis
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Offline Kim Mortimore

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Re: Trophy Trainer/OS .46LA
« Reply #2 on: September 06, 2011, 08:48:11 PM »

Bill,
I am interested in the TT myself.  I'm looking at a picture on Stuka.  Very attractive plane.  The nose looks just a little long.  What is the actual measurement thrustwasher-to-LE and tail moment hinge-to-hinge?  It would be a shame to put all that work into a light build and then have to glop on tailweight. 

Someone put an LA46 on a diet recently and knocked off quite a bit of weight.  His name will come back to me...soon...old brains don't work as fast.  Also, the stock muffler adds to the quality of the engine run, but is a porker as you know.  Larry Fernandez ground the fins off an OS muffler a while back and reduced the wall thickness to bring the weight down.  Looks better too and doesn't affect the run.

Cheers,
Kim Mortimore
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Kim Mortimore
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Offline Bootlegger

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Re: Trophy Trainer/OS .46LA
« Reply #3 on: September 07, 2011, 09:37:59 AM »
  Wasn't the "weight trainer" for the OS 46 Carl Shoup?  I too am in the "Mature" group, but this came to like a "Bolt from the Blue"... y1
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Offline Peter Nevai

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Re: Trophy Trainer/OS .46LA
« Reply #4 on: September 07, 2011, 11:20:55 AM »
Quote from: Ty Marcucci on September 06, 2011, 09:40:30 PM
Hi Bill.  I have gone through five TT, all but two with the OS .46 LA-S.  3.5 to 4 oz is about right depending on venturi/humidity/nitro.  None came out nose heavy.  Still have two kits to build as I am out of Profiles ... Can't figure out why I am so hard on them LL~ LL~ LL~

Cause dey nearly vanish when heads on.  ;D
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Offline Steve Fitton

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Re: Trophy Trainer/OS .46LA
« Reply #5 on: September 07, 2011, 12:05:00 PM »
Quote from: Ty Marcucci on September 06, 2011, 09:40:30 PM
Hi Bill.  I have gone through five TT, all but two with the OS .46 LA-S.  3.5 to 4 oz is about right depending on venturi/humidity/nitro.  None came out nose heavy.  Still have two kits to build as I am out of Profiles ... Can't figure out why I am so hard on them LL~ LL~ LL~

None came out nose heavy?  I respectfully differ on that.  The red one you had at Marietta last year had the cg somewhere around the fuel tank, and that was after it had gotten dinged up and had a broken prop.  I took the liberty of balancing it on my fingers while you were rolling up its lines  >:D
I suspect the cg had alot to do with that crash, we watched you making low pullout after low pullout even with *max* control inputs-you knew where to hit the corners but the model was just not doing it.
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Offline Steve Fitton

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Re: Trophy Trainer/OS .46LA
« Reply #6 on: September 07, 2011, 12:07:11 PM »
Hey Bill, Aaron is going to keep practicing his piped plane, right? S?P

A trophy Trainer would be a fun entry for profile stunt on Saturday, but his PA-40 job is working too well not to fly it all the time!
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Offline Bill Little

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Re: Trophy Trainer/OS .46LA
« Reply #7 on: September 07, 2011, 03:03:14 PM »
Quote from: Steve Fitton on September 07, 2011, 12:07:11 PM
Hey Bill, Aaron is going to keep practicing his piped plane, right? S?P

A trophy Trainer would be a fun entry for profile stunt on Saturday, but his PA-40 job is working too well not to fly it all the time!

Hi Steve,

Aaron is looking to put together a set up that he can carry around in the car to practice after work.  With everything here at my shop, it makes it harder to make things work out.  He is going to keep using the Satona for sure.  Right now, we both need a LOT of stick time! ;D

Maybe the Jurassic Stunt project will be finished by Huntersville.  All depends on how I react to the chemo.......  if all goes well, I think I can have it finished, and possibly flown (!!) by then.

Bill
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Offline Kim Mortimore

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Re: Trophy Trainer/OS .46LA
« Reply #8 on: September 07, 2011, 06:22:35 PM »
Quote from: Bootlegger on September 07, 2011, 09:37:59 AM
  Wasn't the "weight trainer" for the OS 46 Carl Shoup?  I too am in the "Mature" group, but this came to like a "Bolt from the Blue"... y1

Yes, indeedy, Carl Shoup it was.  Goes to show that two old heads are better than one.

Carl, if you read this, how did your LA46 weight loss experiment work out?  Any problems?

Cheers,
Kim
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Offline Steve Fitton

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Re: Trophy Trainer/OS .46LA
« Reply #9 on: September 08, 2011, 06:16:42 PM »
Quote from: Ty Marcucci on September 08, 2011, 05:30:23 PM
Hmmm I was not aware of that, but have used smaller tanks on most.  And here I thought my low pull outs were great.  I do like an aft CG, but that one was too far back.  Sure wish you had told me that at the time.  On three I had to add nose weight.   One had an OS .35 FP and one had an OS .40 FP, the others had the OS .46 LA-S. D>K H^^

CG was not too far aft, it was too far forward. Very, very nose heavy...
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Offline Steve Helmick

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Re: Trophy Trainer/OS .46LA
« Reply #10 on: September 26, 2011, 01:01:19 PM »
Quote from: Bootlegger on September 07, 2011, 09:37:59 AM
  Wasn't the "weight trainer" for the OS 46 Carl Shoup?  I too am in the "Mature" group, but this came to like a "Bolt from the Blue"... y1

I know Larry Foster did at least one OS .46LA with a bunch of excess foof milled off. Bob Smiley owned the test engine, but it came out fine and lost a lot of weight. Wasn't particularly handsome, but it was light. Maybe Randy Powell has some recollection of that particular .46.   H^^ Steve
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Offline Kim Mortimore

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Re: Trophy Trainer/OS .46LA
« Reply #11 on: September 26, 2011, 08:31:02 PM »
Quote from: Steve Helmick on September 26, 2011, 01:01:19 PM
I know Larry Foster did at least one OS .46LA with a bunch of excess foof milled off. Bob Smiley owned the test engine, but it came out fine and lost a lot of weight. Wasn't particularly handsome, but it was light. Maybe Randy Powell has some recollection of that particular .46.   H^^ Steve

"Foof" must be a machinist's term I'm not familiar with.   LL~ LL~ LL~  It would great if someone who has hacked one up could post pix or a description of how to do it.  I have enough of them lying around (as do a lot of people) to be able to ruin one or two in the process without shedding any tears.

Kim 
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Offline Steve Helmick

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Re: Trophy Trainer/OS .46LA
« Reply #12 on: September 26, 2011, 09:24:26 PM »
My recollection is that the case was milled with a large BNC, cutter path aligned to the cylinder axis, if that helps. Now you can also wonder what a BNC is.  LL~ Steve   
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"The United States has become a place where professional athletes and entertainers are mistaken for people of importance." - Robert Heinlein

In 1944 18-20 year old's stormed beaches, and parachuted behind enemy lines to almost certain death.  In 2015 18-20 year old's need safe zones so people don't hurt their feelings.

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