<snip>

Dave Arbogast wrote:

I think there is a bias in the debate... Try this paradigm - Look at
the engine as a black box... ignore what is inside and how it works.
Measure the volume the box takes in for one revolution of the output
shaft. In the end, nothing else matters. Right? End of discussion...
-dave>
--
-dave
mailto:dave@arb.net
http://arb.net

I totally and unequivocally agree.

Paul Lamar

Now wait a minute!  With a 4 stroke piston engine you are only measuring
1/2 the pistons in one revolution.  With a 2-stroke, one revolution does
it.  In other words, I can't make the measurement without knowing what's
in the box.

Bob White

--
http://www.bobwhite-abq.com
N93BD - Rotary Powered BD-4

Sure you can. If x amount of air and fuel goes in in a given time period 
x amount of HP comes out in the same time period. Actually the last statement
is redundant as HP is work done in a given time period. Time period
is implied when HP is discussed. 

That makes a one cylinder two cycle equivalent to an inefficient two cylinder 
four cycle and a one rotor. The only way to tell the difference is there would 
be more oil in the exhaust of the two cycle and the one rotor :) Of course 
there are efficiency differences in a narrow range between .45 BSFC and .65 BSFC.

It could be a turbo prop engine in there. In that case it would be really inefficient
at a BSFC of over one for a small turbo prop.

Paul Lamar
 
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