I have enlarged my prop from the standard 6 x 4 to 8 x 6 on my skysurfer due to the lack of thrust received from the smaller prop. This included some cutting and changing to get the motor mounted to the correct height to accommodate the bigger prop.
I have kept the line of thrust and relative position the same as it was but now have a problem with nose down pitching when opening the throttle. The nose down is directly proportional to the amount of throttle and thrust applied. The plane is perfectly balanced but be due to the pitch problem I will not be able to fly it.
Does anyone have reccommendations as how to overcome this problem
Replies
maybe you can do the mixing in the radio to add some up elevator as you throttle up.
or try different angles with the motor mounting.