NEP
User
Moin,
Sorry for keep thread in English
I have recently bought a second hand Mistral in good shape - my the first testflights indicates a "tail problem".
The dive test indicated an over stable glider. I moved the CG a bit back at lifted the tailplane leading edge a bit (increasing the angle of incidence).
That helped a lot.
The tailplane is misalligned in all three dimension, so I need to rework the support console on the tail fin. Also the EWD, because....
I have measured the EWD which shows to 2.5-2.6 dgs less than the main wing (which in my notation means -2.5 dgs) - too much downwards tailforce!
The manual (bauanleitung) says 'just' EWD 1.5 dgs - but is that negative or positive???
My gut feeling says that 1.5 dgs is positive - but it could also just mean -1.5 dgs (one case meaning that the glider currently have 1 degree too much negative EWD; or on the other hand is 4 degree wrong, in case it has to be +1.5 dgs)...
1) Any one "out there" who have had the same EWD experience/adjustment; or (even better)
2) One who is able to clearly state: 1.5 degree less than the main wing or 1.5 degree more than the main wing??
Grus
//Niels (Dänemark)
Sorry for keep thread in English
I have recently bought a second hand Mistral in good shape - my the first testflights indicates a "tail problem".
The dive test indicated an over stable glider. I moved the CG a bit back at lifted the tailplane leading edge a bit (increasing the angle of incidence).
That helped a lot.
The tailplane is misalligned in all three dimension, so I need to rework the support console on the tail fin. Also the EWD, because....
I have measured the EWD which shows to 2.5-2.6 dgs less than the main wing (which in my notation means -2.5 dgs) - too much downwards tailforce!
The manual (bauanleitung) says 'just' EWD 1.5 dgs - but is that negative or positive???
My gut feeling says that 1.5 dgs is positive - but it could also just mean -1.5 dgs (one case meaning that the glider currently have 1 degree too much negative EWD; or on the other hand is 4 degree wrong, in case it has to be +1.5 dgs)...
1) Any one "out there" who have had the same EWD experience/adjustment; or (even better)
2) One who is able to clearly state: 1.5 degree less than the main wing or 1.5 degree more than the main wing??
Grus
//Niels (Dänemark)