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Thomas,
Looking at your question and the answers, it
appears that you most of the answers you need, however I can expand on this
slightly, my notes say that oil under 160F for best power and never
exceed 200F with 180F being a nice upper limit for TO and climb - that how
interpret it anyway. I know other have exceed these figures without damage, but
I'm conservative by nature.
Water is recommended not over 170F for
best power and not to exceed 180F . However Lynn put some figures up just
recently that vary from this slightly.
The feeling I got from others is to not use the oil
to water cooler solution, I can't remember all the reasons, but they sounded
logical.
The rule of thumb I use is 3cu" to each HP for
water and .8cu" to each HP for oil.
George ( down under)
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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