Re: QQ Yak 102" with a DA-85 ???
I had a Gen I QQ Yak with a BME 115 up front and it balanced fine. I think the DA 85 is a bit lighter with one less muffler but it could probably be done. I also believe the Gen I was a bit lighter in the tail. When I changed to a 3W 106 I had to move the batteries all the way back behind the rudder servos. I am sure with a little bit of work it could be balanced with a DA 85.
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