Neil,
Thank you. Makes sense. I was thinking about the extra plumbing etc.
without factoring in the assumption that the engine would be running for max
power and thus producing max heat.
Thanks,
Jim.
-----Original Message-----
From: Albaugh, Neil [mailto:albaugh_neil@ti.com]
Sent: Friday, April 05, 2002 4:32 PM
To: 'Waldron, James'; land-speed@autox.team.net
Subject: RE: Water cooled vs. Air cooled engines
James;
I read an engineering book some time ago on reciprocating aircraft engines
and it indicated that the superiority of liquid cooling was pretty well
established by the late thirties. In high- output engines, the air- cooled
cylinders reached a limit of BHP due to the cylinder head temperature; they
simply couldn't get rid of the heat. Liquid- cooled cylinders ran at a more
uniform temperature and cylinder head cooling was much better. Of course,
there were lots of good radial air- cooled engines that were developed but
other considerations pushed their use in aircraft-- you never run out of
coolant being the main one.
Porsche pushed their air- cooled flat-12 cyl turbo engine in their '73 Can-
Am 917-30 up to around 1200BHP but it could reach 1500BHP for short periods
before high cylinder head temps made it necessary to back off the power.
Even Porsche has now gone to liquid- cooling for their engines.
Regards, Neil Tucson, AZ
-----Original Message-----
From: Waldron, James [ mailto:James.Waldron@CWUSA.COM
<mailto:James.Waldron@CWUSA.COM> ]
Sent: Friday, April 05, 2002 12:33 PM
To: land-speed@autox.team.net
Subject: Water cooled vs. Air cooled engines
I don't see much in the way of air cooled engines being used. Is this due
to the drag imposed by direct airflow over the engine? Do the water cooled
engines even use a radiator, or due to the short(ish) duration of the run do
you just fill them up and let the fluid boil off? (Do you even fill the
engine with coolant at all?)
I seem to remember there was a Wolkswagen Wolks-liner a few (?) years back -
anyone know how it did?
Sorry for all the questions, I'm pretty new to this.
Thanks,
Jim.
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