ORIGINAL: dennymo
I have a question. I have been flying RC for about 25 years. With that many years of experience flying, a person would think that I would know the answer to this question. I have flown mostly high wing airplanes such as the Piper Cub. I did try to fly a P-40 once and as soon as it came of the ground, the airplane rolled over to the right and slammed into the runway. What happened? I hear about the term tip stall. Is that what happened? If so, how do I keep that from happening again? I have another .60 WWII warbird that I'm ready to fly but I scared that history will repeat itself.
As an experienced RC flier, you can understand this.
1. Regardless of the info in a kit, etc. with a War Bird type model assure the CG is NOT aft of 27% MAC. Most show 30-35% on the instructions. That is absolutely stupid and I cannot ever figure why they do that other than to sell more kits. 25% MAC is the best in sub-sonic aeromodeling with convergent airflow. Once you become really familiar with the model you can sneak it back slowly if you feel you must. When it snaps on a TO you know you overdid it.
2. With the wings on most scale-type models, a neat trick is to raise the ailerons - each side - at least 3 degrees and preferably 5 degrees from the making the wing with a slight effective washout. In addition it helps big time to have more UP than DOWN in your aileron set-up, but the washout technique WORKS! Years ago I raced in War Bird Scale Racing and my models flew straight off and I could turn tighter without a snap.
Stand a good distance behind a big airliner and check the trailing edges. They washout big time.
Couple years ago I was at a field and a modeler was cussing a new Corsair. I suggested the aileron treatment and next flight the TO was straight out and he was doing aerobatic maneuvers he could not do before without snapping out. Nice to see a modeler having FUN rather than dismay.
Oh you will get plenty "OH-NO" from the sideliners as they will not recognize your use of basic "applied aerodynamics" even after you prove it to be true. Pay no mind to the unknowing.