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Re: [ST] Counter Rotating Brakes
- Subject: Re: [ST] Counter Rotating Brakes
- From: Gavin Lawrie <gavin.lawrie@xxxxxxxxx>
- Date: Mon, 17 Apr 2006 19:28:45 +0100
On 17 Apr 2006, at 18:18, Steve Lawler wrote:
> I always assumed that air brakes used pressurized air to retract the
> pistons. Thus when you loose air pressure the wheels lock up. IIRC,
> back
> when I had my Class 2 license, on trucks equipped w/ air brakes I
> would
> have to let the pressure build up before I could release the
> parking brake.
>
> Then there is that Bugs Bunny cartoon when he stops the airplane in a
> nose dive inches from the ground by applying the air brakes.
>
> OTOH maybe the air brakes that you speak of are what they use in
> Congress.
Different kind of air brakes. I was thinking of the flaps /
parachutes used to slow down very high speed bikes (like on planes).
As I understand it, the air brakes you mention are simply power
assisted conventional brakes (like in many / most cars). There are
two systems - those that lock up when pressure is lost, and those
that don't. Don't know which type trucks use - but know that on
railways the most common type is the one that locks up when there is
a failure.
Best regards
Gavin Lawrie
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