Re: [ihc] Air Brake Systems

[bearbvd@xxxxxxxxxxxxxx (Greg Hermann)]

At 12:24 PM 4/28/04, David Raistrick wrote:
>On Wed, 28 Apr 2004, Tom Mandera wrote:
>
>
>> I have friends that bring generators and 110V air compressors to races.
>>   The gas generator makes electricity that powers the air compressor
>> that makes compressed air.
>>
>> I was thinking I could just run the compressor pump off the gasoline
>> engine directly and avoid all of the energy loss by converting gas to
>> recip motion / heat energy to electricity to an electric motor to an air
>> compressor.
>
>
>The gas-powered air compressors I'm familiar with two one of two things:
>
>run constantly, venting compressor-air once tank pressure reaches
>threshold.

They generally do NOT vent compressed air. They 'unload' the compressor by
holding the intake valves open full time.

GReg
>
>or they run till they reach pressure, cut spark or fuel, and stop running.
>when pressure reaches the lower threshold, they refire themselves.  More
>complicated, and requires an engine that starts easy...:)
>
>
>The former is easier, and you can probably find a pressure regulator to do
>exactly that at a compressor supply house...
>
>...david
>
>
>--
>        David Raistrick    http://www.netmeister.org/news/learn2quote.html
>keen@domain.elided           http://www.expita.com/nomime.html