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From: Hans Conser <hansconser@gmail.com>
Subject: Re: [FlyRotary] Frozen coolant...
Date: Mon, 9 Jan 2006 15:44:17 -0700
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>


On Jan 8, 2006, at 9:35 PM, David Leonard wrote:

> I flew to Mammoth this weekend for some snow boarding.=A0 Has a great=20=

> time, and was 210 kts GS on the way up.
> =A0
> Parked the plane for two nights and came back out this afternoon for=20=

> the flight home.=A0 But there was a small puddle of coolant under the=20=

> engine... and it was still dripping.=A0
> =A0
> Then I remembered.=A0 I recently sprung a leak in a cooling line - =
while=20
> away from home.=A0 After fixing the leak I used tap water to refill =
what=20
> coolant had been lost - about a gallon.=A0 I had forgotten all about=20=

> that on this latest trip... to the mountains.=A0 I figure the =
antifreeze=20
> level was now down to about 25/75 and the overnight temps in the low=20=

> 20's did the job.
> =A0
> I had to concentrate on getting back home for work tomorrow so I=20
> couldn't do much.=A0 I couldn't even take off the lower cowl.
> =A0
> I suspect the radiator is cracked somewhere.=A0 Anyone have any=20
> experience with this sort of thing?=A0 Can this do damage to the =
engine=20
> block?=A0 The radiator is custom and will not be cheap to replace, and=20=

> it will take a while, and the plane is an 8 hour drive away...=A0 :-(
>

Dave, take a deep breath and relax, I really doubt you hurt your engine=20=

with that concentration & those temperatures.  The block will retain=20
quite a bit of heat too, so the inside of your engine may never have=20
even seen temperatures that low.  I've had straight water down to 20=20
before, and only the radiator froze.

Hans