On one early year Mazda rotary
installation, they had a similar arrangement. They had a small heat
exchanger that went between oil filter and the block. It apparently did
not prove satisfactory in that application and soon disappeared.
If you use the Rx-7 Oil cooler, it has a
thermostat which should keep the oil temp near optimum. When the OAT cools the
thermostat starts to open and diverts oil around the cooler core thereby
maintain its heat at/near some target temperature.
Ed
From: Rotary motors in aircraft
[mailto:flyrotary@lancaironline.net] On
Behalf Of Thomas Mann
Sent: Friday, December 18, 2009
11:03 AM
To: Rotary
motors in aircraft
Subject: [FlyRotary] Radiator/Oil
Cooler Combo
I was watching a
video that was created by Tim England regarding his 4.3 V6 install in a
velocity.
In his install he
was running some sort of oil cooler that was a combination oil filter mount
with a heat exchanger working off of the coolant from the radiator (or
something to that effect.) His argument for this approach centered around his
belief that under extremely cold temps at altitude, an oil cooler that is
inside the radiator may make the oil too cold to run at peak efficiency. i.e.
keeping the oil at around 195F was a better option under all temperature
conditions.
So now I have these
questions:
Does this philosophy translate to Rotary
powered aircraft?
Is the oil
cooler/radiator a good solution?
If it is, do I need
to use a different inch^3 figure per HP to derive the correct radiator size?
If the 195F oil
solution seems viable, does anyone know of an oil filter mount that includes a
heat exchanger?
T Mann
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