Oil Cooler

[HighWing]

I am helping a guy finish a Series V with the 912 ULS Series 7 firewall forward package. I am plumbing the oil lines and don't want to finish until I know whether an oil cooler is required. I know that in my Model IV iat was marginally needed, but essential at times. What bits of wisdom can you give me on this?

Lowell

[Av8r3400]

Mine is a model IV with the round cowl and a 912UL-80 hp.

I have never seen an oil temp over 240° on my plane that does not have an oil cooler. This is with an OAT up to ~90°, but that's probably cooler than you get there in CA. :cool:

[Dick B in KY]

Just for info, I am building a SS7 with the round cowl (will have 912ULS). Just ordered the oil coolers (two required) from Kitfox for my aircraft. Evidently they are required to keep things at proper temps.

Dick B

[DesertFox4]

I couldn't fly mine in Phoenix without one. No way. I see 245 degree oil temps at times with one here on a "warm" day.

[HighWing]

This is the info I needed. I had one on my IV with Rotax and it was marginally necessary. I had the shutters on the cooler and seldom opened them, But this was the 80 hp. and logic would tell me that the "S" would generate a tad more heat.

Thanks,

Lowell