>> Can anybody tell me how I might go about mounting a gear onto the
> >> shaft of an IC motor? It's for an onboard electric starter thing I'm > >> working on.
> >>
> >> It's just occurred to me that there might be a cog available which
> >> has a sort of collar on it with a set-screw in there.. this would
> >> work I suppose but it'd be a threadlock nightmare.. and I kind of
> >> had a plastic gear in mind. Still, does anyone have any ideas or > >> opinions?
> >
> > Why not think "Torrington"? A torrington bearing at the centre of a
> > cog would grip the ground section of the crank allowing an electric
> > motor to crank the engine. Once the engine is running, the torrington
> > will disseangage.
> >
>
> Bit over my head matey, but I have considered the one-way bearings as used
> in pull-starters (those at the rear of the crankcase on small buggy engines)
> which would be cool for this, however...
>
> my main reason for doing this is to run the electric motor as a kind of DC
> generator once the IC engine is running :-) So it is not desireable to > disengage..
Ok, but I've got to ask, for what reason do you want a DC generator on a heli?