Fred wrote:

To help provide some guidelines, I calculated the coolant flows required to
dump engine heat from rotary engines assuming 40-60 ethylene glycol and water
coolant.  One should target for ideally for a coolant temperature rise in the
engine (and drop in the radiator) of 10 degrees F, but this is seldom
possible, so 20F is a good compromise figure.  You will see that it requires
a lot of flow.  If the flow rate gets too low, the radiator performance
suffers in two ways: the temperature difference across the radiator decreases
(less driving force for heat transfer) and the cooling film resistance goes
up (further reducing the temperature difference eon the air side).  The film
coefficient in the engine will also suffer raising engine metal temperatures.

Fred

Jeff, how is that water pump coming?

Paul Lamar
 
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