Hi Doug, Nice picture, I'll try to load up a couple from my install when I get home.

Mine (and my friend's) had bad vibes over about 9krpm even when bench mounted to a piece of 16mm thick MDF. I'll make up a longer shaft and mount a bearing in the old firewall for rear support. To be honest, my motor turning 15-16k on 12S in a heli is probably where it would be happiest, not running up and down the rpm range with a gyroscope hanging off the front. But hey, I've been one of the unlucky few who's even had troubles with a YS motor and they're "top shelf" too.


David I know where your coming from, lighter flys better. With modern gear and construction you can knock out some weight and it's a circular thing.

less weight = smaller motor=less fuel=lighter weight=better performance

But anyway, I'm waffling off topic and diluting the good replies to Greg's original post.

EDIT: Actually when looking at eness76-RCU's numbers we're fairly similiar He's got 6S 5Ah pack vs my intended 10s 3Ah (same total energy capacity) and his 650Kv on 6S works out to be about 390kv on 10S (mine's 400Kv) and I'm down about 1k rpm static with 2 extra inches of pitch...