RE: Double the engines?

["Steve Tyng" <stevet-at-stcharlesmd.com>]

Paul wrote:

> Everyone using tracks that are made from a chain that is not
> Roller Chain have given up sprocket drive in favour of
> friction drive. All normal chain drives expect the sprockets
> and the chain to remain in alignment at all times , on a tank
> this does not happen when you are trying to turn and so the
> chain rides up the sprocket and comes off , especially bike
> chain where the chain and sprockets are designed to do that
> so the gears can be changed.

About bike chain jumping of the sprockets.  I think it may have more to do with the 
sprocket than the chain.  If you look at the typical bike sprocket you'll see one 
tooth that has a ramp cut into it to allow the chain to come on and off easily.  I 
always wondered if a standard 40 series sprocket (same pitch as bike chain but 
thicker) were turned down to an appropriate thickness, if that would work well for a 
sprocket drive track.

No matter how a track is driven.  If it doesn't have a good system to keep the track 
in alignment at the road wheels.  It will most likely fail in a skid turn.

Steve Tyng