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Old 02-11-2006 | 04:00 AM
  #19  
sigrun
 
Joined: Jul 2003
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From: Dunnunda, AUSTRALIA
Default RE: Ballooning Thunder Tiger Trainer

ORIGINAL: branston1201
Thankyou 'sigrun' for the very informative technical case - I shall print off and study at leisure!
This Sunday I will try (UK weather permitting) with rear edge of wing shimmed up approx 1/8" as suggested and hopefully my instructor will not feel the need to become so agitated with either the performance of the plane or its 'ground pilot ...
Pleasure. Summarised in a succinct sentence, all that says by way of explanation is the TTT wing design is going to ensure it's gonna' do that to some degree anyway, which is worsened by (a) strong gusty winds, (b) using more powerful an engine than intended for the design, and (c) incorrect wing incidence cut into the saddle at the factory (not uncommon).

Shimming the rear of the wing up as someone has already suggested will decrease the wing incidence relative to the thrust line, LOF and and RAF effectively reducing the exaggeration of that ballooning characteristic. ie: It'll fly better.

If your instructor is truly becoming "agitated" with you and conditions, find a good instructor. If with the plane, don't proceed until you fix it. Trying to teach with a plane as you describe is nigh on an impossible ask in the worst cases. He shouldn't be. Been there done that. Pointless proceeding until the model's flight characteristics are corrected.