[SEL] The McVickerish Engine

[Rob Skinner]

On Mar 23, 2010, at 9:50 AM, Larry Evans wrote:
> This reminds me of an experiment I ran a while back with the 50 hp.
> Fairbanks Morse spark ignited engine at the Mount Wilson  
> Observatory.  What
> I did was run the engine up to its regulated speed of 290 rpm. and  
> then
> killed the ignition and fuel to shut it down.  It took 2 minutes and  
> 45
> seconds to come to a complete stop.  I then did the exact same thing  
> but
> also opened the compression releases at shut down.  It took just 2  
> minutes
> to come to a stop which indicates to me that governing against  
> compression
> probably is a little more efficient than not.

Sounds like a fun experiment, Larry.