wrote: snip I'm using oil for cabin heating. It's hotter. --=20 ,|"|"|, Ernest Christley | Concerning cabin heaters, I had been planning on following John = Slade with the heater A/C combo until a conversation with a fellow Cozy = builder and he claimed that running the hot water lines inside (as would = need to be done on a Cozy) leads to a possible failure mode that could = cook the pilot and / or passengers. Said hot water from engine escaping = into cabin usually causes steam which somehow is hotter that the water = or is more likely to spray all over the place and cause great pain to = the occupants. Claimed this is what caused one of the air racers to = crash recently. Should I change to oil for the heat ? If so, what = exchanger will handle the oil pressure and spikes of the rotary? All = comments (sensible) welcome.=20 Wendell ------=_NextPart_000_003F_01C6A854.10848F80 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

Wendell,

If a water based exchanger leaks in = your cabin, the=20 steam will *not* be hotter than the water, but will certainly move = through the=20 space quickly. I am using a Ford Escort heater core, my own home-made = fan/duct=20 system. I have a shut off valve for the water to keep hot water = from=20 coming into the exchanger until I want it, *and* a check valve on the = return, to=20 keep water from coming in backwards if a leak developed.

Bill Schertz
KIS Cruiser # = 4045

----- Original Message -----
From:=20 Wendell = Voto=20
To: Rotary motors in = aircraft

Sent: Saturday, July 15, 2006 = 6:17=20 PM

Subject: [FlyRotary] Re: = heater

-----

Subject: [FlyRotary] Re: = heater

Ernest.

My oil temp generally runs 10C degrees cooler than the coolant=20 temperature.

This is actually very desirable as the oil red line is 210F = while the=20 coolant can go much higher.

Also it will take longer for the oil to heat up than the = coolant as=20 it's thermostat is activated at 140F degrees allowing flow through = the=20 cooler, while the coolant thermostat is usually at 180F, = if=20 you have one installed.

Having said all that, I am currently using my oil cooler = exhaust air=20 for cabin heat just because it was easier to do, since the oil = cooler is=20 mounted to the firewall and has its own fresh air inlet and = outlets.

Jim

Ernest Christley = <echristley@nc.rr.com>=20 wrote:

snip

I'm using oil for cabin heating. It's hotter.

--=20
,|"|"|, Ernest Christley |

Concerning cabin heaters, I had = been=20 planning on following John Slade with the heater A/C combo until a = conversation with a fellow Cozy builder and he claimed that = running the=20 hot water lines inside (as would need to be done on a Cozy) leads = to a=20 possible failure mode that could cook the pilot and / or = passengers. =20 Said hot water from engine escaping into cabin usually causes = steam which=20 somehow is hotter that the water or is more likely to = spray all over=20 the place and cause great pain to the occupants. = Claimed=20 this is what caused one of the air racers to crash recently. = Should I=20 change to oil for the heat ? If so, what exchanger will handle the = oil=20 pressure and spikes of the rotary? All comments (sensible)=20 welcome.

Wendell

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