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