Re: TORQUATROL UNIT

[Angus Holliday <trstag@domain.elided>]

At 12:52 AM 6/25/99 +0100, you wrote:

>There's some sticky fluid in there but not a lot else, and definately 
>no bi-metal strips, nor anything that could lock it up.
>
>I don't claim to know about BMW's but I do know a tiny bit about
>Stags, having bought my first one exactly TWENTY years ago 
>this month.

Though this is onlymarginally related to Stags.....I have one of the "pure"
lock up type units on my  1972  BMW 3.0CSI.
They were considered somewhat troublesome and many have been replaced by
viscous ones from 530s.  The operation is
quite interesting though.  It consists of a small "brake drum" on the
outside with  tiny " brake shoes"  attached to a
tiny pressure plate affair.  In front is a temp sensing bulb that presses
the pressure plate backwards when it gets hot.
This engages the brake shoes on the drum and the fan is locked tight.  When
not engaged the fan spins only from bearing 
drag and you can stop it with your finger. (Don't try this at home)  Mine
works quite well.
        Peugoet uses one that is electrically activated (505s)

Walter
Stag Specialists N.A.
520 792 0294