----- Original Message -----
Sent: Monday,
October 20, 2008 4:40 PM
Subject:
[FlyRotary] Re: Water in Fuel?? (or another adventure in the aviation events
of Ed Anderson)
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???).
Cold start
doubles the pulse to all 4 injectors; turning off one set doubles the pulse
to the remaining two.
I was guessing
maybe the secondary were maybe first in line; but the reality is there is no
way of telling where the water was going to go first, or how much in each,
or whatever.
Al
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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