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I seriously considered a water oil exchanger.
Fluidyne also made some of those that looked really good. Dont know if they
still do.
Ultimately decided not to go that route. So many
people were having cooling issues when I was designing my system and it seemed
that using seperate air oil exchangers would ease potential debug
hassles.
I'm mostly happy with my choice. Its working well
so far. And using a $25 wrecking yard RX-7 oil cooler was about as cheap as it
gets. My only complaints so far are that I am not real happy with the looks of
the extra scoop I added for the oil cooler, and my braided stainless oil cooler
lines are fairly long and heavy.
I probably will redo the cowl somewhere down the
road after I get a good handle on just how well the cooling is on hot days. So
far its looking like I could stand to shrink both inlets a little - maybe a lot.
On my flight the other day coolant temp never went over 180. And that included
taxi from the extreme west end of the airport to the other end of an 8000'
runway.
Mike Wills
RV-4 N144MW
----- Original Message -----
Sent: Wednesday, August 19, 2009 6:58
AM
Subject: [FlyRotary] Re: back in the
air
Mike,
Great to hear you are flying again.
I don't know if you have seen some of the new
water/oil heat exchangers?. They mount in the tank of the water radiator. The
preferred installation would be a dual pass water rad where the front tank is
divided. The water flows through 1/2 of the radiator and gets cooled off. Then
it flows through the end tank past the oil cooler picking up heat. Then it
flows back through the second half of the radiator and gets cooled off again
and finally gets returned to the engine. This solves the "which hose do I put
the oil cooler in" dilemma. It also can greatly simplify the ductwork and make
the radiator more efficient. If you are thinking about re-doing your cowl, it
might solve some of your problems.
Monty
----- Original Message -----
Sent: Wednesday, August 19, 2009 12:01
AM
Subject: [FlyRotary] back in the
air
Finally. I'm confident that the reseat of the B
controller chip solved my problem with spontaneous loss of data. I flew for
1.5 hours last friday. Engine running great and staying cool. Minor issues
with the radio, landing gear shimmy on the landing, and still dont have the
rudder trim right. But getting closer. Hope to get serious now about getting
this thing working now that summer (and the soaring season) are winding
down. Too many hobbies.
Mike Wills
RV-4 N144MW
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