I understand, Mike.  Way too hot to be rummaging around in the Attic at this
time of the year in any case.  Just send me a copy when you do find it.

Thanks.

Ed

Ed Anderson
RV-6A N494BW Rotary Powered
Matthews, NC
----- Original Message -----
From: "Mike Robert" <pmrobert@bellsouth.net>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Wednesday, August 11, 2004 9:14 PM
Subject: [FlyRotary] Re: Pressure switch


> Russell Duffy wrote:
>
> > In fact, I just realized why I run so rough on desent.  The MAP is
> > probably getting pulled down below 10" and the pressure probably drops
> > even more making it very lean...  hmmm  :-)
> >
> > I mentioned this to Tracy one day, and he said (best I understood it)
> > that the engine basically isn't running under these conditions.  For
> > one thing, the injector duty cycle is so low that they effectively
> > aren't opening.  I've noticed times in the pattern when I was
> > descending at idle, and the engine noise seemed to almost go away.
> > Opening the throttle some made it start, then going to idle stop.  I
> > got the distinct feeling that the engine was not running at idle, just
> > like a car cuts the fuel on deceleration.  Interesting.
> >
> > Rusty (Maaaaaaaayby running Rev-3 by Sunday)
> >
> >
> If you're running only premix, be careful with this situation, for
> obvious reasons. Those apex seals *like* a touch of lubrication :-) Pump
> people should be fine! I run premix in my daily driver rotary and set
> the ECU to give .3 ms + opening time to my injectors on overrun/decel -
> which is what descending at idle is, to an extreme, for a long time. Ed,
> still haven't got into that attic for the SAE paper, my apologies! I'll
> be up there soon.
>
>
>       -Mike
>
> >>  Homepage:  http://www.flyrotary.com/
> >>  Archive:   http://lancaironline.net/lists/flyrotary/List.html
>