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Message
John,
Could there be a hangar bum that doesn’t
like rotaries, and would like to see your effort fail, that could have sabotaged
you? Just a thought…
Mark S.
From: Rotary motors in
aircraft [mailto:flyrotary@lancaironline.net] On
Behalf Of Ed Anderson
Sent: Monday, January 10, 2005
2:47 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Flattened
Fins (not Finn) : [FlyRotary] Re: Oil cooler baffles
John, Mark has a very good point. I also found that a
power washer will not only clean your aircraft and engine compartment just
fine, but will also provide hours of later "enjoyment" combing
straight the flatten fins in the radiators and cooler. I believe
I learned this the same way Mark did. {:>)
----- Original Message -----
Sent: Monday, January
10, 2005 2:09 PM
Subject: [FlyRotary] Re:
Oil cooler baffles
John,
You didn’t happen to
“power-wash” your a/c lately? That will flatten the fins on a
heat-exchanger in a hurry. Don’t ask how I learned this.
Mark S.
From: Rotary motors in
aircraft [mailto:flyrotary@lancaironline.net] On
Behalf Of John Slade
Sent: Monday, January 10, 2005
12:31 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Oil cooler
baffles
A couple of days ago I took off with the
landing brake down. I only have the NACA scoop, so the engine was getting very
little air. By the time I was downwind the temps were outrageous. Coolant got
to 270 and oil to 260. Needless to say I glided to a landing (on the runway) at
idle. Thankfully the engine seems no worse for the experience. Oil pressure is
ok to good and static rpm is unchanged. I flew again today (landing brake up)
and temps were tolerable, but higher than I used to have long ago, in hotter
weather before the new turbo and the rebuild.
Looking at my two stock 3rd gen oil
coolers after landing I noticed something strange - most of the thin
aluminum baffles between the oil channels are all bent flat, blocking
the air flow. Those that aren't bent are toward the lower edge of the cooler
where airflow might well be less. They're all bent the same in an even
pattern that would indicate to me that this was either done by one of those
crop circle guys on his day off, of the high pressure air from the scoop
hitting the coolers at an angle.
Has anyone else seen this? I know I can
"comb" the aluminum straight again, but will it just happen again?
Should put a baffle in the air stream to
angle the air somehow?
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