George,

That may have been me following Paul Conner’s first engine-out landing.  I picked up the idea from the Eggenfellner Subaru group.  They had had a couple of instances where pilots ran one tank dry and then couldn’t get the EFI pump to re-prime, and ended up in off-field landings.  It is now a mandatory change for anyone running the Eggenfellner package.  I used a small carburetor jet from my stash of 2-cycle motorcycle jets.  It was about .020-025” and installed so as to bypass the pressure regulator, bleeding air back through the fuel return line.  I have tested my setup and it allows enough pressure relief to permit the pump to re-prime if I run a tank dry.  Before installing the bypass bleeder circuit, it would not re-prime unless I cracked open a line downstream of the pump. 

 

Mark S.

 

 

-------------- Original message from "George Lendich" <lendich@optusnet.com.au>: --------------

 

Georges,

Very small is my guess, someone on here gave that suggestion some time ago and I can't remember the size they suggested. It's just to relieve the pressure after shut down. The loss during running is so small as not to matter.

I thought it was a great idea !

George ( down under)

 

What maximum size orifice would you use in the bypass hose? Georges B.   -------Original Message-------   From: Rotary motors in aircraft Date: 06/13/05 15:50:42 To: Rotary motors in aircraft Subject: [FlyRotary] Re: Engine Not Starting   > 3. Always stop the engine by turning off the fuel pump, so that > there is no fuel pressure in the line.  Otherwise, unburned fuel may > leak from the still pressurized injectors into the rotors and increase > the chances of hard starting or flooding the next time you try to start > the engine.   Bob, The suggested low volume by-pass hose ( by passing the fuel pressure regulator) will also solve that problem. George ( down under)       .