REFLECTOR: Fuel shut-off valve location

[Jim Agnew]

For all of you looking for a fuel shut off valve I suggest that you get a two way valve and mount it backwards, that is so you have one in and two out.  This is a great feature since in one direction you have engine fuel flow and in the opposite direction you have a fuel drain connection/shutoff. You need to cap off the drain connection so you cannot accidentally drain fuel into the airplane.  Uncap the drain, attach a drain hose and open the drain side and gravity will let you drain the tanks.  Very handy for maintenance.

I have used an electric operated valve for many years with no problem.  Before you all dump on me about the valve see the description at

http://www.tvbf.org/gallery/?dir=subsystems%2FElectric_Fuel%20Valves 

The motor driven screw drive valve requires NO power to hold its position and takes about 250 MS to transfer.  I use the fuel tank switching to drive a red flashing led to indicate the off position and a standard toggle switch with a "toilet seat" protector that requires you lift it to change the switch position.

Jim 

 
James F. Agnew
Jim_Agnew_2 at Yahoo.Com
Tampa, FL
Velocity 173 Elite Aircraft Completed & Flying




________________________________
From: Andy Millin <amillin at sbcglobal.net>
To: Velocity Aircraft Owners and Builders list <reflector at tvbf.org>
Sent: Monday, July 20, 2009 9:55:04 AM
Subject: REFLECTOR: Fuel shut-off valve location


Hey Dave,
 
I used the cable with the push button lock.  It cannot be moved (in or out) unless you are pushing on the button.  The button requires more than a casual amount of force.  It cannot be moved accidentally.
 
I had originally put mine in the keel.  I made a nice recess for it.  Looked great.  Once I had my seat installed I found there was no way I could practically operate the cable.  My thought is that if (IF) I ever have to use it for score, I want it to be right there and easy to do.
 
I had to order a special cable.  Aircraft Spruce only stocks it in a 10’ length.  I have an XL.  I ran it down the pilot side duct.  It took 13’.
 
I have pictures of my installation on my Construction Log.  The push-pull knob is shown on picture 1472.  The valve is shown in picture 574.  The cable now comes from the pilot duct instead of through the keel and under the sump.
 
Andy
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