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Basically, with the heat factor,
vibration, and not knowing exactly how long it would take before 321 breaks
down, it's just something else to go wrong. We are coming straight out of
the turbo to the exterior, not much room to play. So we are looking at
alternatives.
Lancair
20B N178RG in Progress
----- Original Message -----
Sent: Thursday, December 17, 2009 5:05
AM
Subject: [FlyRotary] Re: Cabin Heat (Was
Oil Cooler)
Greg,
did this exhaust guy elaborate on why it might not be a good
idea?
Why
can’t we move the heat muff further from engine to where temps are similar to
Lycoming – use flex-stainless tubing for ducting?
Jeff
From: Rotary motors in
aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Greg
Ward
Sent: Wednesday, December 16, 2009 1:32 PM
To: Rotary
motors in aircraft
Subject: [FlyRotary] Re: Cabin Heat (Was Oil
Cooler)
We've
been looking at the same things with our install. We talked to our
exhaust guy, and he feels that with the exhaust temps that these rotaries
have, that it might not be a good idea, (the muff). Next step was hot
water, plumbing, and a heater core inside some where, which was sort of a
negative idea. We kept all of our cooling lines exterior, so that a
coolant leak wouldn't happen inside at about 10K feet, and 200+ knots, not a
good scenario. J.C. Whitney has a small electric heater that has some
possibilities, so we are looking into that and some other
ideas.
Lancair 20B N178RG in
Progress
----- Original
Message -----
Sent: Tuesday,
December 15, 2009 1:41 PM
Subject: [FlyRotary]
Cabin Heat (Was Oil Cooler)
I'm considering going to a heat muff since
there is sooooooo much exhaust heat that's just going to waste. I was
going to incorporate it into the heat shield of my newest muffler
design. Of course, I'll need to add a CO detector in the cabin for
safety.
On Tue, Dec 15, 2009 at 3:24 PM, Jeff Whaley <jwhaley@datacast.com>
wrote:
Well with 3
coolers already, I didn’t want to add a heater core and all the plumbing – I
may move my scavenge point from oil cooler to water radiator as it is below
the engine (uphill for warm air) and closer to the firewall (fewer corners
to turn). I picked the oil cooler because at the time my oil temp was higher
than water temp – now it’s the other way around … also the outlet of oil
cooler as installed is less likely to get contaminated with exhaust
fumes.
Jeff
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