What causes this?

Ken Cook wrote:            Is this a scratch built designed plane or a kit? Your maneuvers are taking place very quickly and sharply. This is stalling the wing which is causing a loss of air speed and the wobble you see. Open up your maneuvers a bit so that you maintain the speed. Other factors such as plane weight to square wing size come into play. If your on the beefy side in terms of weight, this is causing the engine to work even harder. It's very difficult to diagnose a problem watching a video.

            Speed and keeping the speed is critical. When you introduce engine offset and rudder offset, this has the plane flying sideways. This scrubs off needed speed and promotes the wobbling you see in your video. You want the plane to fly tangent to the circle in a non- restrictive manner. Having too much line rake, engine offset, rudder offset, and too much tip weight contributes to the problem your seeing.


        Doing consecutive maneuvers back to back is really going to bleed off speed.  It looks cool but it really strangles the plane. If the plane is on the heavy side, it needs to fly fast. Thin wing planes suffer the same fate. However, if you enter into a maneuver with full arm extended and using your entire arm will open the maneuver and keep the plane sustaining.

Ken Cook wrote:Jim, that was the Fox .15 on there in the video? It certainly sounded like it was no slouch, it was doing pretty good. It did sound a bit lean but it didn't seem to be sagging badly. Very very nice. I do enjoy them and this is a great example when I mention they like to be turned up. Pretty darn cool there. Ken

getback wrote:Man that was crazy it does have a sing to it (love is in the air ) Nice way to hold on , was this the first flight ? The cameraman seem to be a bit close or just my perception . COOL !!

getback wrote:May be a little less throw in the controls if it were me .