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From: "Ed Anderson" <eanderson@carolina.rr.com>
To: "'Rotary motors in aircraft'" <flyrotary@lancaironline.net>
Subject: RE: [FlyRotary] Re: Water in Fuel?? (or another adventure in the aviation events of Ed Anderson)
Date: Mon, 20 Oct 2008 15:12:47 -0400
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In my design, the primary injectors are first in the fuel rail loop with
both secondary injectors following then the pressure regulator.  So perhaps
the primary injectors were injecting a high ratio of fuel/water whereas by
the time the slug got to the secondaries it was mostly water?

Wait, turning the cold start on OR turning either injector pair off
(secondary in my incident) both result in the same effect of doubling the
pulse duration.  Any time you turn an injector  pair off you also ground
(turn on) the cold start circuit (right Tracy???).

So turning the secondary injectors off probably simply provide the same
effect (for whatever reason) as turning on the cold start. 

In my "incident" several years ago, I was able to keep the engine running
approx 30-45 seconds longer with the cold switch on than with it off.
Sometimes 30-45 seconds longer engine run might make a difference.

In any case, checking fuel for water goes back to getting the emphasis it
deserves.

Ed

Ed Anderson

Rv-6A N494BW Rotary Powered

Matthews, NC

eanderson@carolina.rr.com

http://www.andersonee.com

http://members.cox.net/rogersda/rotary/configs.htm#N494BW

http://www.dmack.net/mazda/index.html


-----Original Message-----
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On
Behalf Of Dale Rogers
Sent: Monday, October 20, 2008 11:40 AM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: Water in Fuel?? (or another adventure in the
aviation events of Ed Anderson)

Bob Mears <bmears9413@aol.com> wrote:
> I actually a little surprised it had that much stumble. I would think 
> with the fuel injection and a re circulating system it would just pass 
> the water through the system and slowly burn it off. I guess it was a 
> fair amount of water and thats all that was going through the system 
> at the time. Like a quart of so in the bottom of the tank. That would 
> take a bit to pass through. Interesting.

That depends on how much fuel can be held in a branch that has no outlet 
other than the injector.  If the runs off the main path are short, then 
the effect should be short lived (but pucker-factor is measured in very 
long, individual, nano-seconds).

Dale R.


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