Mailing List flyrotary@lancaironline.net Message #11393
From: John Slade <sladerj@bellsouth.net>
Subject: RE: [FlyRotary] Re: Limp home mode
Date: Mon, 13 Sep 2004 16:55:07 -0400
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
=============
What I am interested in is the scenario of coolant loss, a computer that
only fires, say, every third revolution so that although the engine is
producing only partial power, it is also producing minimum heat.  Still
enough to stay airborne, and able to be cooled with the oil alone.  Is this
possible?
=============
They say a rotary is cooled 1/3 by oil, 2/3 by water, so theoretically you
could use 1/3 power and continue flying, but there's probably more to it
than this. I expect that some parts are cooled by more by water than oil and
vice versa. Certainly you can turn off one set of injectors (or one set of
coils) and lower the power use, but you can also lower power use by reducing
throttle. The automatic cadillac system sounds like more of a sales gimmick,
and for those who don't know how to do this. The rotary is very good at
"limping home". It has redundant ignition and fuel injection. I once saw a
disassembled engine which "blew" in a drag race, then was driven home 100+
miles.

Lose of coolant is something you can prevent with quality hoses and
fittings. Perhaps the more likely scenario is water pump failure for which
you can add a backup electric water pump.

John (Sticking with rev 1)

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