Downthrust for motor
 

I am about to convert a glider to electricity. The glider is the local version of Gentle Lady, (Blue Phoenix for you swedes out there...) with two meter wing span and Clark-Y profile. Do anyone have a suggestion for suitable down-thrust in relation to the wing for the motor?

Jens

RE: Downthrust for motor
 

IMHO would suggest starting with 3 to 4 degrees of downthrust for a Clark Y.

Let us know how your project turns out.

Regards
Ramrod25

RE: Downthrust for motor
 

And about 2 degrees of right thrust.....

You'll probably find that the model still wants to nose up with power even with 4 degrees of downthrust. This will be much more noticable if you're using a gear drive system and large efficient prop. If you trim the CG placement using the dive test procedure you'll find the nose up effect may be reduced somewhat.

RE: Downthrust for motor
 

Why not just look up the specs on the Goldberg Electra. ;) I think it has 5 deg down and 3 right, but its been 15 to 18 years since I built mine. (and the motor that came with it was dismally inadequate)

RE: Downthrust for motor
 

I'll keep you posted when things start to proceed.

Jens