Mailing List flyrotary@lancaironline.net Message #9725
From: John Slade <sladerj@bellsouth.net>
Subject: RE: [FlyRotary] Re: New Scoop
Date: Wed, 14 Jul 2004 14:06:27 -0400
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
oil temp up to 217 coolant about the same.
Speed only about 120 kts.  Didn't retract the nose gear.
OK. If you retract the nose gear, does it go down a few degrees? Mine does.
Now if you're cruising faster at, say 160kts at 5000ft with the gear up -
how does it cool now?

Last time I flew I was getting a stabalized 205/210 in the climb
(coolant/oil). When I leveled off at 5000 it settled down to 185. At
11000
it was lower until I opened the throttle, then it stabalized at 185.
I'd be happy with those temps
Were not comparing apples & apples. My gear was up. I climbed slowly
(1000fpm) to 5000, then on to 11000. I'd bet you're temps wouldn't be much
higher if you did the same flight.

My coolant sensor is in the water pump housing
Mine too.

My oil sensor is in the top of the remote oil filter
Mine is close to there

The oil cooler is closest to the scoop, so should be getting more air.
I don't think it works like that.

I'd say the biggest difference between our installations is the exhaust
augmentation / turbo / exhaust shield setup. Very little of the heat from
turbo & exhaust gets to stay in the cowl.

Sorry to harp on this Steve. I just have a feeling that you're working hard
to get the temps lower than they really need to be. If you want minimum drag
at cruise, then the temps SHOULD be marginal on a hot day take off and
climb. So... get the gear up and back off the throttle till you get in
cooler air at cruise speeds. If necessary give it a rest half way up, or use
the technique of doing a long approach to cool off before climbing that
someone described. If it'll cool ok at full power at cruise height, then
you're in good shape. My 2c.

John


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