Mailing List flyrotary@lancaironline.net Message #34923
From: Joe Ewen <jewen@comporium.net>
Subject: Re: [FlyRotary] Re: fuel pumps
Date: Mon, 25 Dec 2006 22:34:08 -0500
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Message
Rusty,
Will the Lucas Harness Smoke also work for semiconductors or is that a different part number?  I presume it is installed with a standard syringe.
Joe
----- Original Message -----
Sent: Monday, December 25, 2006 5:39 PM
Subject: [FlyRotary] Re: fuel pumps

 A single pump system
is a non starter in aircraft. 
 
Lynn E. Hanover
 
Hi Lynn,
 
Funny you should mention this, because I've actually been contemplating a single pump system on the single rotor.  These pumps are quite reliable, and seem to give lower readings as they start to wear.  I could probably argue that all the extra plumbing and wiring might cause more problems than it avoids.   Also, no one seems to mind running a single regulator, but that could fail just as easily.  
 
One thing I keep thinking about is a conversation I keep having with a couple RV buddies.  One guys wants an auto conversion, but only if it's as reliable as his car.  The thought being that you get in your car and drive thousands of miles, and don't ever consider what whether the engine might break on the way there.  Using a modern car as the reliability standard, you have to accept that there is only one of everything (ECU, fuel pump, etc).  
 
BTW, just to let you know how abby-normal I think, I used to run both pumps all the time, just as I also run my boost pump (almost) all the time for the Lycoming.  My logic is that I'd rather find out about a pump failure when I'm safely on the ground, checking them individually during my run-up.  
 
I'm certainly not telling anyone to take out their backup pump, but I'm wondering if I might just leave mine out. 
 
Cheers,
Rusty (attached pic for Lynn <g>)


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