Ivanmagd potpuno si upravu......motor na dole ponistava evekat penjanja pri vecem gasu, tj. gura nos aviona na dole. Vise o ovome potrazite po netu,evo jedan od linkova koji se mogu naci
https://sites.google.com/site/electricrcaircraftguru/motor-thrust-anglesili izdvojen tekst !!!!
2) Down-thrust angle: The down-thrust angle is required primarily to offset the climb response of higher-speed airflow over the wings. As throttle is increased, airspeed over the wings due to prop-wash alone tries to almost instantaneously make the airplane climb. Down-angle counters this climb for increased throttle. Also, the aircraft will actually speed up, causing additional lift trying to make the plane climb. Again, down-angle counters this climb effect. Secondarily, the down-angle of the motor also reduces the "slant" of the propeller to incoming air (when viewed from the left side of the plane again), making it more upright (|), and less slanted (/), thereby also reducing the yaw due to P-factor simply by removing some of the slant (angle of attack), which causes P-factor! Therefore, the down-thrust angle counters both the climbing effect, and some of the yaw due to P-factor!
Sad ti za tvoje potrebe nemoj da preteras pa da stavis preveliki ugao. Podbaci jednu podlosku za pocetak na gornja dva srafa pa vidi kako ti se ponasa avion i ako treba dodaj jos !!!