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PA2RHB > INFO 14.07.02 17:09l 21 Lines 639 Bytes #999 (0) @ WW
BID : 250007PA2RHB
Read: DB0FHN GUEST
Subj: carbon/water speed controls
Path: DB0FHN<DB0ZWI<DB0CHZ<DB0ERF<DB0FBB<DB0GOS<ON0AR<ON0AR<PI8WFL
Sent: 020702/2046Z @:PI8WFL.#NH1.NLD.EU #:49297 [Enkhuizen] $:250007PA2RHB
From: PA2RHB@PI8WFL.#NH1.NLD.EU
To : INFO@WW
>
> I wonder if you have ever come across a similar principle of speed
> control, but using a salt water bath as the resistance element?
>
Yes I did, quite often. It was the speed control of the merry-go-round!
Every fair I went to as a kid had it. The water would be in a barrel. An
hinged cover carried the plates. A wooden handle completed the control,
which looked rather dangerous to me!
As for carbon motor controls, I think every sewing machine (electric, that
is) used to have one. Pushing the pedal meant squeezing carbon chips
together, lowering resistance.
Rudolf
Heemskerk
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