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Ian,
the OMP varies the amount of oil going into the valve. The valve is actually a mini intake manifold in parallel to the main intake manifold. When the rotor sucks the mixture in through the manifold, some of it is going through the little vacuum hose and the little hole in the rotor housing picking up what oil the OMP got into the valve. This oil is misted into the combustion chamber.
If you have no valve, the droplets of oil will only produce an oil sweat at the exit in the rotor housing and not doing anything. Sorry!
I hope I was able to clarify this.
Richard Sohn
N-2071U
----- Original Message ----- From: "Ian Dewhirst" <idewhirst@dewhirst.ca>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Monday, May 23, 2005 7:05 PM
Subject: [FlyRotary] Injector Valves (was Re: Technical Advisor)
Hi Richard,
Do the injector valves vary the amount of oil injected based on load? I
have dissassembled a pump from a 13BT and it looks to be a positive
displacement type with no apparent pressure relief function. I do not
have any "injector valves", just plain old banjo bolts that thread into
the housings, a jet sits in the bottom of the hole below the banjo bolt.
What am I missing?
Thanks -- Ian
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Georges,
the 12A pump is way to small for the 13B. According to the spec. the 12A
pump is pumping 2.0 - 2.5 cc in 6 minutes on its two lines with the
engine running at 2000RPM.
The 13B NT does 4.5-5.5 cc on two lines in 5 minutes engine running at
2000RPM. The Turbo setting does 5.2 - 6.6 under the same condition.
One more thing, if you use the OMP. You must retain the injector valves
sitting on the rotor housing and the intake manifold. Their vacuum line is
hooked up to the intake plenum. These valves do the oil injection, the OMP
only supplies the oil!
I hope this answers the question.
Richard Sohn
N-2071U
Homepage: http://www.flyrotary.com/
Archive: http://lancaironline.net/lists/flyrotary/List.html
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