The fan doesn’t run all the time in the car…does it
freewheel and/or do the bearings give out?
Bill B
From:
Rotary motors in aircraft
[mailto:flyrotary@lancaironline.net] On
Behalf Of George Lendich
Sent: Friday, October 30, 2009 4:22
PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: Cooling report
If I remember right the argument
was the fan blade being close to the rad, would restrict flow when not in
use, and to allow the blade to freewheel would kill the fan
bearings.
It's obvious that a fan on the
ground is quite an advantage.
I always felt that a fan that
could swing away, out of the air flow, would be ideal. However having the room
to do that would be problematic.
I believe Rino
said he had a fan on the oil cooler, which I feel would be restrictive in
aviation use, from what I've heard. Might be good for taxiing
etc.
George ( down
under)
George;
I added a fan
behind the coolant radiator; and found it had no detrimental effect in
flight, and made a big improvement in cooling on the ground. This is
on a pusher (Velocity) with a ram scoop. I expect it could make a
difference depending on what type of fan and the effectiveness of the
intake scoop.
Al
G