|
|
I am still going to use the same " Fuel pump off for eng. shut-down" I just wanted to let folks know of the un-failure mode disscovered, & not ever heard of, noted last Nov., had to write myself a note in my wallet to remind me to post this unusual finding. David R. Cook RV6A Rotary. ( freezing in MI ) ----- Original Message ----- From: "Thomas Mann" <tmann@n200lz.com> To: "Rotary motors in aircraft" <flyrotary@lancaironline.net> Sent: Thursday, January 6, 2011 10:48:37 PM Subject: [FlyRotary] Re: SPAM-LOW: [FlyRotary] NOTICE !!!! Engine run-on with fuel pumps off!
???
I’m still in the rebuilding state so my rotary has not yet been installed.
So is the shutdown procedure different?
I always pull the mixture for shutdown ( except in the case of emergency then it’s ignition turned to off.)
Sent: Thursday, January 06, 2011 9:32 PM
Subject: SPAM-LOW: [FlyRotary] NOTICE !!!! Engine run-on with fuel pumps off!
Long story short, standard eng. shut-down, main fuel pump switch to OFF, half second or less, eng. quits rather quickly. """UNLESS""" you are low on fuel,,, & picked up some air in the lines,,, eng. remained running,,, after shaking the thoughts of gremlins out of my head, possible as long as 20-30 seconds & quick look at fuel gauge for tank I was on the thought came to me that I picked up air from empty tank & pressurized it with fuel pump, I now have an air pressure-fuel pump backup sys. so eng. will remain running, had to shut down elect. to stop eng. How about that one to start the year. David R. Cook RV6A Rotary. |
|