|
Message
Yeah, yeah, I get the hint. Well, I do have such an
instrument in my plane with a sensor in front of and behind the right-side
rad and seeing as much as 50 - 60 deg F temp rise. This
could mean 2 things. Terrific rad performance or lousy air
flowrate. The airflow on the right is not as good as on left
where I happen to know it is pretty good, so I should install a temp probe
there too.
Thanks for the
temps. Do you agree that it makes more sense to put the oil cooler
in front of the rad, since the oil cooler will have less of an effect on the
performance of the rad, than vice versa? I'm probably going to end up
testing that theory, mostly because I just bought this large expensive
Setrab oil cooler, and I'd like to keep using it. The other factor is the
radiator, I'm down to only 17.25 x 12.5 x 2.25 of radiator that's uncovered, and
still have plenty of extra water cooling available. The smallest standard
core at Howe racing is 17.25 x 15.5 x 2.25, so I'm likely to have more than
enough radiator to do the job, even if the oil cooler pre-heats the air
some. Heck, I might even have enough radiator capacity to test the Evan's
coolant.
As I see it, there are
three cooling modes:
1- Full throttle turbo
climb of about 180 hp at 100 mph.
2- Normal cruise power
of about 160 hp at 200 mph.
3- Low power descent,
worst case Ed's stealth hamburger approach
:-)
The difference between 1
and 2 will have to be controlled by a cowl flap. A thermostat or EWP
controller will take care of the water temp for number 3. I'm not sure how
to keep the oil temp up though. What do you guys see for oil temps in
descents? Mine plunges to 120-130F. Maybe a cowl flap that's really
restrictive could handle number 3 as well.
Back to the drawing
board. I need a really great cowl flap.
Rusty (finding out in a
few minutes if I have to drive to Greenville, SC tomorrow for a 30 minute
job...groan)
|