I have been using a BadAss 2320 820Kv on my Ringmaster front mounted. I have been having some issues with the collar slipping on the motor shaft as I tighten the prop. I am not comfortable with this. I have used the front mount motors for years, this is the first one that won't tighten properly. I looked to switch it to a rear mount but the drive shaft they that Inov8tion provides is like 3mm shaft with a very small drive collar that looks like it is for a small prop not a stunt prop.

Anyone know of a 4mm prop drive collar? I have used a Hyperion HP-ADAP-40XL adaptor. It seems to be a couple thou over and doesn't grip the motor shaft well. Is there is away to roughen up the motor shaft to allow it to grip better?

Best,    DennisT

Update: I found a 4mm Aluminum Bullet Prop/propeller Adapter Holder that holds well. It has flats cut into the collar/drive for a wrench. I don't know who makes this one any ideas?

Best,    DennisT

Does it have a small prop shaft, if so the is probably a Great Planes.  1/4-28 shaft could be Spektrum.  I think they both make bullet adapters.  I have been using the Spektrum ones with few issues.  They are difficult to get tightened in a full body with nothing to hold on to.

Ken

I've always solved slipping by putting sandpaper washers (320 sandpaper glued back to back) between each surface (prop/spinner and spinner/drive washer).

Mike