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Date: Thu, 19 Aug 2004 19:11:59 -0500
From: David Staten <Dastaten@earthlink.net>
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To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] Re: Compressor maps
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I was searching for info on a MARCOTTE redrive that was mentioned in 
another thread and found a rule of thumb for determining volumetric 
efficiency..

<paste>

You can roughly calculate the VE of an engine if hp is known with:

VE = 5600 X HP divided by (RPM X Displacement in cubic inches)
<snip>

This was in the context of a Corvair engine so I do not know if the 
dynamics involved are comparable.
The original link was at http://www.sdsefi.com/air8.html

Dave Staten
partner in Velocity 17010 Reserved
Mazda 13b rebuild in progress


Mike Robert wrote:

> John Slade wrote:
>
>> John, here is a URL to a pretty good discussion on reading compressor 
>> maps with examples  
>>  http://cybrina.mine.nu/MR2_Docs/compressor_flow_maps.htm  
>> That's great, Ed. And you did it in one sentence. :)
>> Do you happen to know the engine capacity (in litres) and the 
>> volumetric efficiency of an REW engine?
>> Regards,
>> John
>>  
>
>
> John, the auto people use 2.6 litres and .55 for those turbo map calcs.
>
> HTH, Mike
>
>>>  Homepage:  http://www.flyrotary.com/
>>>  Archive:   http://lancaironline.net/lists/flyrotary/List.html
>>
>