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Message
Greetings,
Sorry to hear about Johns
most recent problems. I'm already nominating him for the perseverance
award.
I tried to go visit Paul
today, but only made it about half way before getting tired of fighting my oil
temps. It was only 60 degrees today, and I climbed at 120 mph, but only
made it to 4500 feet before ringing the bell at 210. I reduced power, and
continued a slow climb to 8500 where I wanted to do some cruise testing, but I
couldn't get the oil temp below 210. At least I thought I could get the
temps down once I leveled out... wrong :-( I finally did a
spirited 180, and headed home to fix this once and for all (I hope).
Otherwise, the engine ran OK.
Water temps continue to be
just awesome, almost too cool, so I can't see this being a cowl exit
problem. I have to conclude that my current (poorly shaped) 24 cu in oil
scoop is not getting the job done. I haven't made a final decision, but I
think I'll probably do the easiest thing first, which is to simply increase the
size of the current scoop, without doing much for the shape. At present,
the scoop is oval, about 7" wide by 4" tall. The plan will be to increase
it to 7" round, which will be 38 sq in, and should be way
overkill. If this doesn't cool significantly better, I may have to come to
a new conclusion :-)
The oil temps were just
great with the B drive. The water temps were even lower than now.
For reference, here's an excerpt from my 7-4-04
log.
Finally got a cloud free day, so I
climbed to 8000 ft to do some testing.
I climbed at 120 mph, and saw a max of 195 degrees on the oil temp, and a
max of 178 degrees on water. It
took 7 minutes, according to the EM-2 flight timer to get to 8000 ft, which is
OK for now.
The extra power afforded by
the C drive must just be pushing my heat load beyond what the current oil setup
can handle. Stay tuned for more fiberglass fun.
Ed, have you noticed any of
this temp increase? Also, what was the size of your oil inlet again?
I know you have a much more ideal duct shape than I do, which is probably
helping quite a bit. At the moment, I'll settle for brute force cooling if
it actually works.
Rusty (joining John with
my "tired of this" attitude)
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