----- Original Message -----
From: "ronald GOWAN" <rongowan@yahoo.com>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Saturday, December 20, 2003 7:23 PM
Subject: [FlyRotary] Re: evap core versus radiator


> While thinking about cooling the rotary in flight
> don't forget cooling the thing on the ground.  The RV
> guys don't seem to have much of a problem but in a
> Long EZ there was absolutely no cooling.  I tried an
> electric fan behind the radiator.  All that did was
> block the ram air and the fan over speed and came
> apart.  On my new design I have a fan mounted
> horizontally with a door to block the inlet so the air
> is forced through the radiators.  With my first
> installation I would pull back the power down wind,
> coast to a landing while the water cooled and then
> haul ass back to the hanger.  My new installation with
> a Marcotte PSRU should be flying this coming summer.


Good Point, Ron

    Its true that for the most part the RV series has little/no problem
cooling on the ground with the fan pushing a bit of air through the
radiators.  Folks with the engine and fan in the back are faced with a
different situtation.  Be interesting to see how your new arrangement with
the ability to put the  fan into or take it out of the circuit depending on
your flight/ground regime of operation.

Ed Anderson