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The Ultimate Buddy Box Club Trainer

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The Ultimate Buddy Box Club Trainer

Old 08-06-2017, 05:42 AM
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Default The Ultimate Buddy Box Club Trainer

Once again today we had to cancel the ordinary Sunday “buddy box” flying lessons due to strong winds..=(..! I am really fed up with these frequent cancellations and so are my students. Therefore I plan to build “The Ultimate Buddy Box Club Trainer” to replace our clubs current high wing balsa trainer with something MUCH MORE DURABLE. In this process I want to pick your brains out there before commencing to design and build.
As a starter, what I currently have in mind is a polycarbonate SPAD, shoulder wing, wide stance trike gear, twin boom inverted Y-tail machine with a pusher two stroke glow engine according to sketch attached. Waddayasay folks, will it withstand the expected cartwheeling and hard bounces to come .? Please chip in and reveal your personal thoughts on the “Ultimate BB Club Trainer” and I promise to listen…THANK YOU.!
Our joint effort may hopefully result in a future situation where I can call my students and say: “We have a really stiff gusty breeze today, please show up at the field immediately so we can practice cross wind landings”.
The floor is yours….Cheers/
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Old 08-18-2017, 04:33 AM
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Default I do listen..!

Howdy, just to let you know that I did get some good input to this thread by "aspeed" here in posts #3 and 7.:
http://www.rcuniverse.com/forum/s-p-...l#post12359542
I now chose to rather place my answer here since they relate more to TUBBCT than to PC coroplast.
Thanks aspeed for showing the Battle Axes by Treneff RC. Yesterday we once again had a gusty crosswind and our regular Thursday night training session was again almost cancelled. After only one breathtaking session with the balsa high wing, Clark Y, large dihedral, "self stabilising..ha, ha.." club trainer we gave up. I had to retake control from the student most of the time and then I barely managed to take it down in one piece...PHEEWW..! We scratched our heads for a while and then borrowed an EPP Mustang inspired by aspeed.(see attachment) That was the closest we could find in the club hangar and to put it short..WOW..!!..SUCCESS..!! The Mustang behaved surprisingly well with its straight semisymmetrical mid wing and our student could now continue his training almost completely without my interference. He even landed himself without breaking the Mustang..!
I must admit that I was impressed by the behaviour of this plane. Thanks aspeed..!! Unfortunately the Battle Axes are not available anymore..=(..!
So maybe now I have to rethink my PC coro TUBBCT..??!!?? waddayasay folks, more input much appreciated. Anyone from "windy city" to chip in..?.Thank you.
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Last edited by canardlover; 08-18-2017 at 04:38 AM. Reason: misspelling
Old 08-25-2017, 08:47 PM
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All the ruggedness in the world won't help you much if the model is a pig in the air. And I truly cannot see a complex material hungry SPAD as being a good trainer. Instead I see it as being overweight and sluggish to the point that it would need to rely on the built in ruggedness far too often. And that's not really fair to your student pilots either.

I think you and aspeed nailed it with the idea of something like the EPP Twisted model. I've seen a few flying and they are nearly bullet proof. And for windy days the reduced pitch stability is actually a huge benefit to easier flying. Simply set up the controls for considerably less throw than they use in their normal role as a flat foamy flippy flyer and I think you've got a great windy weather trainer.
Old 08-26-2017, 08:11 AM
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Originally Posted by BMatthews
All the ruggedness in the world won't help you much if the model is a pig in the air. And I truly cannot see a complex material hungry SPAD as being a good trainer. Instead I see it as being overweight and sluggish to the point that it would need to rely on the built in ruggedness far too often. And that's not really fair to your student pilots either.

I think you and aspeed nailed it with the idea of something like the EPP Twisted model. I've seen a few flying and they are nearly bullet proof. And for windy days the reduced pitch stability is actually a huge benefit to easier flying. Simply set up the controls for considerably less throw than they use in their normal role as a flat foamy flippy flyer and I think you've got a great windy weather trainer.
OK, got your points, but it all comes down to a "reasonable"(not too low) wing loading and a decent wing profile. And some of our students want to learn to handle a glow engine.
I have now ordered 4, 6 and 10mm polycarbonate "coro", I just cannot resist trying it. How about a "sheet F16 wing" with several adjustment possibilities...??..A "must try.".!
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