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Posted for George Braly <gwbraly@gami.com>:
Scott,
Let me take your example just a bit further, to maybe shed some light on the
problem. What you described is not, really, an apples to apples comparison.
And not because it is water cooled, but rather because of the RPM
difference.
You gave us an engine with 106 shaft HP at 5200 RPM. With 4 cylinders, lets
assume it would do 212 Hp at 5200 RPM.
BUT... the comparison is to an engine that can only (due to the prop) turn
at 2700 RPM.
So, your engine would have to make 180Hp on half of its 212 Hp RPM. Not
likely, unless you move to something better than 87 octane.
Folks, there are NO magic tricks here. Piston engines and fuels are what
they are.
One has to carefully look at all of the "Hey watch this... " comparisons to
other transportation paradigms.
Regards, George
-----Original Message-----
From: Sky2high@aol.com [mailto:Sky2high@aol.com]
Sent: Sunday, May 12, 2002 2:27 PM
To: lml@lancaironline.net
Subject: [LML] Liquid cooled engines
Fred, et al:
I recently became interested in motorcycles. I have a Honda VTX 1800 - a 2 cylinder, liquid cooled, sequential electronic fuel injection, electronic computer controlled ignition, medium compression, 120 lb ft torque, 106
shaft HP with peak power at 5200 rpm engine utilizing 87 Octane no lead. It has 4
inch pistons with a 4.5 inch stroke (similar to my Lyc 320). There are
other engines with electronically controlled valves. The liquid-cooled engine problem can be solved, but by whom? Honda, Toyota,
Rotax, Engineair? When? With an ever declining interest in aviation, therefore aviation piston engines, why? Maybe third world country's need
for GA will save us all.
Scott Krueger #############################################################
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