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Hello Kingsley,
> Regarding thinner radiators working better than thick ones .......
> Does this hold true for radiators of the same area?
The radiator I use has a slightly larger area but it also indirectly
cools the oil. So yes I would say that even with the same area you
would be better of with a thinner radiator. You need air going through
the radiator but the original radiator is simply too thick for the
airspeeds we are using and it almost blocks the air. I don't know
where this design came from, but I have not seen any other airplane in
our speed range which has a radiator that thick. The certified
arplanes which use a Rotax engine all have a thin radiator and almost
no air cooling of the cylinders and none of them have the cooling
problems we have with our Europa's.
To have the radiator in front of the engine also enables you to
"recycle" the air coming out of the radiator to air cool the engine
and to draw away the heat from the exhaust stack for free. Less air
"consumption" means less drag, and you don't need the unsightly and
draggy doghouse anymore because a very small air exit is all you need.
Greetings,
Frans
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