ORIGINAL: john agnew
Jim
Please advise on your tail incidence tests ASAP. I am just finishing mine and would like your views on this. Are you using any flap/ elevator mixing? The manual seems to suggest that you need some elevator trim when the flaps are being deployed but returning to no trim when flaps are fully deployed or have I msread this? Could the down elevator trim issue be resolved by adjusting the turbine thrustline? Bet your flying weather is better than ours.
Best regards
John
John. Keep everything as far forward as poss, or you may need weight in the nose. I have 2X5 cell nicads in the nose tray, a powerbox, turbine lipo & UAT on the equipment tray. Turbine pump, valves & ECU are just forward of the turbine. This is using a Wren Supersport & balance is fine without additional weight.
Get the flap/airbrake to go as near 90 degrees as poss.
I am using flap/elevator mixing. I needed about 8mm of elevator downtrim mixed in.
I already have a little downthrust on the turbine to avoid cooking the elevator.
The incidence thing is no big deal. I may set a little negative incidence later, just to see the effect.
I balanced mine on the carbon spar with no wings on.
Weather here is great. The heat of summer is gone. Temps around 82c & sunny every day.