Oops – intended to
attach a photo of the fan installation.
Al
-----Original
Message-----
From: Rotary
motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Al Gietzen
Sent: Friday, October 30, 2009 3:14
PM
To: Rotary motors in
aircraft
Subject: [FlyRotary]
Re: Cooling report
Rino, any
comments on the Griffin oil cooler location and inlet ducting Vs the RX7 oil
cooler location and ducting?
If
oil flow was not the problem it must have been air flow.
Jeff
If there was
not sufficient air flow, then the air outlet temp would be very high, not
very low – unless the temp number is not correct, or there was a great
deal of by-pass flow.
Re: Here is my
fan installation. It is a 4-blade, pull, high flow, Spall. The
inlet scoop is sealed to the other side of the rad. I don’t know
whether it spins in flight when turned off, but there is no evidence that
it does. It works fine after 160 hours in flight. If it is a concern, one
could always use a relay that shorts the leads when turned off serve as
electromagnetic brake. A spinning fan would be more restrictive to
flow being forced through it than one that is stationary – contrary to
one’s intuition.
Al