flyrotary@lancaironline.net Mailing List Archive

Mark,

If the 20B OMP pump is very similar to the 13B OMP in the gear drive and oil supply passage areas, and if an adapter for it is not available, it might be quite easy to adapt it for an external reservoir by adding a supply line, a little JB Weld and an 0-ring. Photos of these changes to a 13B OMP are in the archives.

Steve

From: Rotary motors in aircraft [flyrotary@lancaironline.net] on behalf of Mark Steitle [msteitle@gmail.com]
Sent: Tuesday, April 10, 2012 7:46 AM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: OMP

Steve,

That drawing really helped me understand how the the OMP works. The 20b OMP is very similar, although the lever has been replaced with a stepper motor and a solenoid. Also, the 20B plunger and ports are larger, which makes sense as it must pump 50% more oil. So, it looks like I'll be using the 20b pump after all.

Regarding the plugged port, this was done by Mazda. So, I'll leave it as is. Maybe they used the 2-rotor casting for the 3-rotor engines... just a guess.

Mark