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From: Charly Coughran <ccough...@DELETE-TO-RESPOND-UCSD.EDU>
Newsgroups: sci.engr.mech
Subject: Re: how much air needed to run a 5hp briggs & stratton as an air driver for belt dri
Date: Mon, 15 Oct 2012 19:57:26 +0000 (UTC)
Organization: UCSD
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Dano <0f8503901d844703eea1acecb7a4938a_1...@example.com>
wrote in news:X-udnR-yJMSny-bNnZ2dnUVZ_smdnZ2d@giganews.com: 

> I'm building a genset for my home power using an old
> modified 5hp briggs as an air powered driver, my question
> is; how much volume & pressure will it take? If i use a
> gast compressor must i store the risidual air? Can i
> produce enough air with the gast to be viable for turning
> the rpm needed in long uninterupted runs?
> 

It is not at all clear what you want to do from your 
description.  You need to include significant amount of detail 
including what devices are doing what jobs and the details of 
the devices and hookup.  Gast, for example, makes many different 
types of compressors and air motors.

To give you a general idea of how much volume and pressure there 
is a formula and a calculator at:

http://www.engineeringtoolbox.com/horsepower-compressed-air-d_
1363.html

Note this is a calculator for the hp required to compress the 
air adiabaticly, that is without the transmission of heat.  This 
is not trivial to do.  In addition, every time you transform 
energy from one state to another you loose energy.  You can 
never get back all the energy it took to store the energy.


-- 
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