Mailing List flyrotary@lancaironline.net Message #49418
From: Greg Ward <gregw@onestopdesign.biz>
Subject: Re: [FlyRotary] Re: Cabin Heat (Was Oil Cooler)
Date: Thu, 17 Dec 2009 11:23:00 -0800
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
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. 

Greg Ward

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 canít we move the heat muff further from engine to where temps are similar to Lycoming Ė 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)

 

Hey Mark;

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.

Greg Ward

Lancair 20B N178RG in Progress

----- Original Message -----

From: Mark Steitle

Sent: Tuesday, December 15, 2009 1:41 PM

Subject: [FlyRotary] Cabin Heat (Was Oil Cooler)

 

Jeff,

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.

 

Mark

On Tue, Dec 15, 2009 at 3:24 PM, Jeff Whaley <jwhaley@datacast.com> wrote:

Well with 3 coolers already, I didnít want to add a heater core and all the plumbing Ė 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 Ė now itís the other way around Ö also the outlet of oil cooler as installed is less likely to get contaminated with exhaust fumes.

Jeff

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