Calif Bill wrote:

"Richard Casady" wrote in message
...

On Tue, 11 Dec 2007 20:13:03 -0800, "Calif Bill"
wrote:


Tension on the idler

pulley would sorta regulate the speed.

Only by allowing varying ammounts of belt slippage. You would get very
poor belt life. I have seen this kind of setup, My dad built a lawn
tractor with that kind of clutch. Had a transmission from the flap
mechanism on a B-17. It had only 3 horse or so.

Casady


Get your attributes correct. And there are variable transmissions for
belts. Some automatic according to speed. Variable width pullies. One
gets wider while the other gets narrower giving a bigger diameter.



Correct...

CVTs (continuously variable transmissions) are being used in cars currently on
the market. My Honda Civic Hybrid has one for example.

Take a look at:

http://www.edmunds.com/ownership/tec...4/article.html

Brian C