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"Cox TD .010 with Graupner Silentius free flight model."




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Post  GUS THE I.A. Wed May 15, 2013 2:45 am

Here is another airframe possibility for the COX Flight Contest. It uses a GWS foam wing and a 2 mm foam fuselage and tail, on a hollow triangle boom made from 1/16" sheet balsa. It is all lightly painted, to resist fuel and exhaust, and up on the front-a clean, good running Cox QRC! This is rudder and elevator, only, but it worked fine in this configuration, as an electric, so, more power to it! Only a couple of weeks before the contest begins! Let's see your entries. I'm still in test mode!Meet Bunny... 100_1216Meet Bunny... 100_1217
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Post  Cribbs74 Wed May 15, 2013 3:51 am

Cool Doug,

How many models are you going to come up with? Very Happy it's like a regular plane factory up there. Did you fire up the old Stearman plant?

Any of those should do fine, I think as far as settling on a power plant you may want to go the TD/medallion route due to reliability. If you choose the .051 you may want to put an .049 cylinder on it. .051 cylinders are a little hard to find.

Just a thought. In the end it's up to you!!!!

Ron
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Post  GUS THE I.A. Wed May 15, 2013 4:12 am

Hopefully, I won't destroy the engine during the contest year. The C/L stuff takes off from pavement, but flies over the grass. You know. And, I really do not intend to honk the bejeebers out of the engine, so hard, max-power running won't be my goal of performance. That's why I'm trying to sort-out which combination to compete with. It has to be easy enough, and fun to operate-not a screaming handful, every time it flies!

What would the other cylinder do for it? I hadn't even thought about modding an engine. I need something that will fly in less-than-ideal conditions, so I can fly, and win!

The QRC, with the integral fuel tank, is kind of not the way I want to go, due to the capacity of fuel, and run-time it provides. It seems to have the power required, on the ground, but I haven't flown it yet, and the Stik plane boogied, with the .051 on it.
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Post  Cribbs74 Wed May 15, 2013 4:17 am

The .049 cylinder won't do anything for it or against it. That is if you use a #4 TD .049 cylinder.

A Surestart .049 cylinder on a TD will perform about the same as the .051. The TD cylinders are a little hard to find new. Surestart cylinders can be bought new for around $12-15.

Ron
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Post  GUS THE I.A. Wed May 15, 2013 4:23 am

Oh geez, I don't know what I have. What would go wrong with the cylinder? What about the piston? You're making this hard! Shocked

P.S. I am going to balance the Shoestring...It was WAY nose heavy! Thanks!
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Post  microflitedude Wed May 15, 2013 2:57 pm

They are just suggesting yo use an .049 top end to preserve your .051 from excessive wear. To get another .051 top end you pretty much have to buy a whole new engine.
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Post  Cribbs74 Wed May 15, 2013 4:18 pm

Yeah,

Sorry man, didn't mean to make it difficult. Like Matt said, I was just saying if you fly the .051 for a whole year it may wear out. Then again, it may not. I was just suggesting to use something less valuable.

If you have a bunch of .051's or spares then have at it. Even if you don't..... Have at it! lol!

Ron

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Post  Cribbs74 Thu May 16, 2013 4:22 am

If it eases your mind any I am probably going to use your TD. 049 for the event and it has a bonifide #4 cylinder on it. Yeah man, I'm a genuine rebel!!!

I probably should mention that although I am flying, as the host I am making myself not eligible for prizes. I just want to fly!!!!

Ron
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Post  RknRusty Thu May 16, 2013 5:05 am

I'll be flying a bonafide original Tee Dee .051. I think I'll give it a good checkup before I start putting it to work full time. Might even reset the ball socket. Since I started using a bigger hammer I've done a couple without ruining them. I'll try not to close my eyes before I clobber it. lol!
If I bust this one, I guess I'll buy a new TD .049 P/C from Bernie.

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Post  GUS THE I.A. Thu May 16, 2013 10:14 am

Ah, good! So, besides War Dog, The Reedy, we now have a few TDs lined-up for battle!

And Ron, you WERE able to make heads or tails from the bones I gave you? There's nothing like shooting yourself in the foot, is there? My foot, of course! I hope you have them running well! I didn't see alot of promise in them when they became yours, but I hoped you could CO(a)X them to life!

Now I'm working on another plane...Using BRM airfoil and slightly longer tail moment, and a portion of a large Vitamin D3 bottle, I'm gonna have a....DRUM ROLL... STUNT GEE BEE, for the .051 Tee Dee. Should be together by this weekend, and of couse, the scallops will be - PURPLE! It's a recognizable airframe shape, so, fiddeling the colors to fit my other planes, I think I get a pass on this "scale job". Otherwise, it would have been red.

Oh, and I have this little gizzonkle piece- aluminum, finned glow head that accepts a standard glow PLUG, but the threads to attach it to anything, are on the I.D. of the piece. A picture I took is fuzzy, because the camera can't see that close, so I didn't post it. I will, if some one wants it and know what it is used on. To be continued...
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