Model Boat Mayhem

The Shipyard ( Dry Dock ): Builds & Questions => Pleasure boats, Sports, Race, Power and Leisure Boats: => Topic started by: Mankster on June 03, 2008, 07:55:35 am

Title: Which Propshaft for submerged drive?
Post by: Mankster on June 03, 2008, 07:55:35 am

Gents, I am build a fast electric with a difference, this one goes primarily underwater. I need a straight brass propshaft with bushes that will with stand upto 19000 rpm from a 380w brushless motor. The problem is once bonded in, unless the bushes are the type that can be pulled out with needle nosed pliers (ie poor access, not able to heat the shaft) they will be in there for good and the propshaft cant be removed without destroying a significant part of the boat. So any idea which shaft will be up to the job? I have spotted that SHG marine sell propshafts rated to 29000 rpm with exchangable plastic type bushes. Any one tried these? Or would standard bronze bushes last longer (though I may not be able to remobe them)

Here a picture of an earlier effort that runs on a milder 600 motor and uses a std robbe brass shaft without problems. Cheers.


(http://i136.photobucket.com/albums/q191/Wheelerdealers/s8.jpg)

(http://i136.photobucket.com/albums/q191/Wheelerdealers/s4.jpg)

Title: Re: Which Propshaft for submerged drive?
Post by: Shipmate60 on June 03, 2008, 08:43:51 am

If you may need to change the bushes the SHG ones seem the way forward as they are replaceable.

Bob