Kelly,  

Yes, I have the 20B OMP.  I took it apart tonight and tried to figure it out.  It has two solenoids.  Best I can determine, they take the place of the mixture adjustment rod assy. on the 13b OMP.  In other words, they move the barrel valve in and out, changing the oil flow.  With this figured out, I could probably make it work for my purposes by locking the solenoid plunger in the fully open position.  Or, I could try to figure out what the solenoid's nine wires do and then design a circuit to control it based on MAP, RPM, etc.  Since I'm not an EE or a programmer, that isn't likely, so I think I will just lock it open and use a little more oil.

BTW, the 20b OMP has 4 outlets, but one was plugged at the factory.  So, it only uses 3 outlets.  I think in the long run, it will be easier to use the 20b pump, and it should be a better match than the 13b OMP.  I may try a flow test if I can figure out how fast to spin it to simulate 7000 rpm.  At least I could compare the flow of the 13b to the 20b.   

Tracy - can I exchange the 13b OMP adapter (just arrived today) for a 20b OMP adapter? 

Mark 

On Sun, Apr 8, 2012 at 10:34 PM, Kelly Troyer <keltro@gmail.com> wrote:

    Mark, Steve,

        Have to admit I had not thought of that little problem for the 20B.............Mark did your 20B

come with a OMP ??.............I have a Cosmo 13B but have not paid any attention to the OMP

so do not know as I type if it is like the 89-91 pump or like the 93-95 13BREW pump or if the

20B pump has a completely different mount pad than the 13B..............Mark is your current

front cover a 20B ?.................

 

Kelly

On Sun, Apr 8, 2012 at 8:29 PM, Steven W. Boese <SBoese@uwyo.edu> wrote:

Mark,

 

Since the OMP 's I've seen are set up with 4 oil lines and intended for a two rotor engine, how do you intend to adapt it to the three rotor engine in terms of amount of oil metered and how it is distributed?

 

Steve

 

From: Mark Steitle

Sent: Saturday, April 07, 2012 8:10 PM

To: Rotary motors in aircraft

Subject: [FlyRotary] OMP Plumbing

 

Is anyone running an oil metering pump (OMP) that can help me figure out how the lines should be connected.  I'm planning on using the Mazda banjo fittings to hook up to the OMP, but what do I do with the check valves.  Do you connect the check valves to a vacuum source or just block them off?  Will the system work properly if I plug the check valves?  I plan on locking the lever in the full open position.  Will this work for a/c use?  I'll be using Richard Sohn's adapter with a 1 gallon reservoir filled with 2-stroke oil.   

 

Mark S.

 

 

--
Kelly Troyer
Dyke Delta_"Eventually"
13B_RD1C_EC2_EM2