Re: Re: Engraving and engine turning

In a message dated 8/5/99 2:25:59 AM Hawaiian Standard Time,
Munro@... writes:

<< The second type unwinds from a reel and imputs linear
force to the thing that unwinds it. I've not seen these, and can't comment
on how constant the force is.

David M. Munro >>
David,
The force is fairly constant. The radius that is formed by the spring to
the drum decreases as the spring is pulled out of the drum. On short units or
in short travel distances, the force is very constant. On units that unspool
several feet, I amagine there is slight increase in tension as you go.
Peter