Every time I take my latest boat down to the lake there is a problem with the drive. The model travels about 20 feet and then the neopropaline tube that accts as the coupling between motor and drive shaft slips off. This is annoying and more importantly, embarrassing when it happens in front of other people.
I think that the drive shaft is too thin for the tube. If it were fatter presumably the tube would be stretched and grip properly.
My solution (I hope) was to take a bit of brass tube and ream the inside so the shaft would go inside. Needless to say this wasn’t easy (the simple looking jobs never are) as holding a tube is difficult. I tired pin vices and clamps with varying degrees of success. I don’t own a 1.6mm diameter drill bit either, hence the reaming.
After nearly an hour I had a short tube that would slip over the drive shaft and with the aid of some superglue, stay put.
The neoprop tube seems to fit nice and snugly and certainly looks like it will stay put. I suppose I’ll have to take it out on the water to be sure.
The curse of the camera strikes again by the way. The shaft and motor are lined up a whole lot better than they appear in the picture, although I admit they aren’t perfect.
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