Mailing List flyrotary@lancaironline.net Message #19193
From: Russell Duffy <13brv3@bellsouth.net>
Subject: RE: [FlyRotary] Re: BMW and EWP
Date: Mon, 21 Mar 2005 13:08:55 -0600
To: 'Rotary motors in aircraft' <flyrotary@lancaironline.net>
Message
So, to me, the answer to your question (The real question is how much flow do we need?)  is the engine within its max operating temps.  This is why I installed “CHT” probes on my engine, to monitor the metal temps in the vicinity of the plugs.

 

 

Hi Mark,

 

You've probably mentioned this before, but can you refresh my memory as to where you put these probes?  I'm guessing you could just use the ring type that go under the plug (if they'll fit in the recessed hole)   Is there an official spec for these temps in the area you're measuring?  

 

Of course I agree that keeping the metal at a certain temp is indeed the true goal.  Rotax agrees as well.  As I understand it, the 912S uses Evan's NPG+ as the only allowed coolant.  There is no spec for coolant temp, and in fact they don't even recommend measuring it.  There is a spec for CHT's, which is all they care about.   

 

Cheers,

Rusty (might be game for CHT's if it's not too late)   

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