17-02-2010, 09:18 AM
Gday Steve
Kieran is spot in regards to cutting up the wing more, you will just lose more rigidity. Another option could be using light fibreglass cloth or the polyurethane sealer to stiffen things up. I know you have also experimented with a gyro, that may also be an option, I was impressed with a video elsewhere on this site of the guy who was using 3 to tame his SU27 thingy.
You may also be going so fast that you are inducing "flutter" on your elevons, this can be obviated by ensuring that you have absolutely no play whatsoever in your control rods/ connections. Flutter can also be caused by harmonic vibrations in the airframe so you may want to also very carefully balance your props. The good bit is that if Craig can wack a turbine on the sucker (how cool is that!!!), and get away with it you know it can be done. Once again back to Kieran's comments you have more than likely merely hit the limits of your servos performance. So some digital MG's would possibly remove all your woes.
Good luck with it, I know you will get her sorted.
Cheers
Rob Byrnes
Kieran is spot in regards to cutting up the wing more, you will just lose more rigidity. Another option could be using light fibreglass cloth or the polyurethane sealer to stiffen things up. I know you have also experimented with a gyro, that may also be an option, I was impressed with a video elsewhere on this site of the guy who was using 3 to tame his SU27 thingy.
You may also be going so fast that you are inducing "flutter" on your elevons, this can be obviated by ensuring that you have absolutely no play whatsoever in your control rods/ connections. Flutter can also be caused by harmonic vibrations in the airframe so you may want to also very carefully balance your props. The good bit is that if Craig can wack a turbine on the sucker (how cool is that!!!), and get away with it you know it can be done. Once again back to Kieran's comments you have more than likely merely hit the limits of your servos performance. So some digital MG's would possibly remove all your woes.
Good luck with it, I know you will get her sorted.
Cheers
Rob Byrnes