Rotax Propeller

[Kai]

I balanced my 3300 jabiru sonex and yes the heavy spinner is a pain. I have a couple of extended prop bolts that have as many as 10 washers to balance. Felt better about that than drilling out weight

Indeed the way to go for the Jabiru range. But Jabiru can offer prop drive flanges with several choices of different neck lengths, making space for long prop bolts and balancing washers. Alas, as far as I am aware, this luxury does not exist on the Rotax- there is hardly any room at all for either longer prop bolts or washers between the flange rear face and the gear housing neck.

Looking at this for another angle- do you really feel that the spinner is the culprit? I was thinking as it was clearly made on a lathe out of one massive lump of aluminium stock, it would be as nearly perfectly balanced as possible?

Comments?