I received some preliminary information about oil flow rates in Lycoming

engines which was stated as 5 gal/ min. The other list had a thread where

it was stated that the flow rate of the 13b oil pump was 9.5 gal / min @

6000 rpm. How would play out in a scenario where an aircraft oil cooler

was used in place of the Mazda unit? It would seem that the AC cooler can

adequately cool 5 gal/min while the mazda unit can cool 9.5 gal/min. If 2

A/C coolers where used would the two scenarios be equal? Just thinking out

loud any thoughts? Thanks

Joe Berki

Could be, but you really don’t know. The flow rate numbers are approximate, and the margins designed in may be different. You may be better off comparing core volume with a Mazda cooler. For the same HP out, I recall that the rotary puts more than twice the heat load into the oil.

Al