Oct 19, 2014, 08:47 PM
Joined Jun 2008
A good place to start, but tune to your liking...post 927
I hope it helps
Originally Posted by Machineman
For what it is worth, here are the settings I used at the Worlds...
CG = 55mm
Ailerons= +/-10mm and then set the positive differential to give more up than down as follows:
Normal 50% (10mm up, 5mm down)
Thermal 1 = 60% (about 10mm up, 4 down)
Thermal 2 = 70% (about 10mm up, 3 down)
Thermal 3 = 80% (about 10mm up, 2 down)
Note, these are actual movements as you move the sticks and are taken from the deflected flap positions in each phase. The joys of owning a Graupner MX-20 with 7 flight phases.
Also, I re-trim the elevator in each phase for smooth level flight, but this changes slightly if it is windy or calm (e.g. a calm setting will fly backwards in wind so re-trim in windier conditions to the speed you want, it is quick and easy to do at the start of a day).
Expo 30% on everything
Snap flap +2mm down with full up elevator in all modes except Thermal 3
Aileron to Rudder Mix 100% in all modes
Speed = +0.5mm down (yes down, it is better than clean)
Normal = +1mm down (when I go searching for a thermal)
Thermal 1 = +2mm (this is the mode I spend most of my time in)
Thermal 2 = +4mm (only in strong lift)
Thermal 3 = +6mm (only if dead calm with no turbulence)
Launch 1 (rotation phase on a spring switch)
0mm flap and enough up elevator trim to make it rotate fast. Use more when it is clam and less when windy, tune it every time the conditions change or the plane can end up behind your head. Release the spring switch when the plane is between 70 and 90 degrees (vertical).
Launch 2 (zoom phase)
0mm flap when it is calm and -1mm flap when it is windy. Use the elevator trim to make if fly straight up without pushing forward or rolling back over your head. This changes depending on the wind.
Both these launch phases are on a 'flight phase' with independent elevator trim for each phase.
Please, please, please, don't accept these settings as gospel, try, experiment and find your own optimum.
I hope this gives you some different ideas.
I love my XXL's and they are still my primary plane.