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  #1  
Old 06-30-2017, 04:26 PM
togaflyer togaflyer is offline
 
Join Date: Apr 2013
Location: Cleveland Ga
Posts: 380
Default Andair fuel valve location

Any issues with mounting the Andair fuel valve directly to the tunnel cover. Will it create any flow issues when the tanks are down to the last five or ten gallons. This brain bubble popped up when I thought about the bracket location inside the tunnel for the Van's stock valve. Also, because the fuel raises to the valve, drops to the filter and pump, then back up to the firewall, a low point in this section of the fuel line. Should a fuel drain be installed at this low point.
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  #2  
Old 06-30-2017, 05:29 PM
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Jesse Jesse is offline
 
Join Date: May 2005
Location: X35 - Ocala, FL
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Quote:
Originally Posted by togaflyer View Post
Any issues with mounting the Andair fuel valve directly to the tunnel cover. Will it create any flow issues when the tanks are down to the last five or ten gallons. This brain bubble popped up when I thought about the bracket location inside the tunnel for the Van's stock valve. Also, because the fuel raises to the valve, drops to the filter and pump, then back up to the firewall, a low point in this section of the fuel line. Should a fuel drain be installed at this low point.
I have seen it mounted to the tunnel cover in a number of installations. Just make sure you use nutplates to mount it there so you can unscrew it from the tunnel cover to remove the tunnel cover. Usually I see flex lines connected to it when mounted this way.
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  #3  
Old 06-30-2017, 06:40 PM
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9GT 9GT is offline
 
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Location: Southern Michigan
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I put mine on the tunnel cover. I first machined a custom extension that protruded through the cover, drilled a clearance hole for it. Drilled out the Andair plate and made a custom delrin bushing for it that fit the plate tight and had a few thousandths clearance for the extension. Transferred the mounting hole locations for the Andair plate on the tunnel cover and installed 6-32 nut plates. Worked great and looked good also.
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  #4  
Old 07-01-2017, 08:36 AM
TS Flightlines TS Flightlines is offline
 
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Rich---remember the least amount of large elevation changes you have, the easier it is for the mechanical pump to PULL the fuel out of the tanks. Fuel would rather be pushed under pressure than pulled under suction.

Tom
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  #5  
Old 07-01-2017, 08:55 AM
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9GT 9GT is offline
 
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I found a photo of my valve location. I mounted the valve body itself in the per plans location, hence the custom extension. I also modified the Andair cover plate itself.
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  #6  
Old 07-01-2017, 09:01 AM
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Carl Froehlich Carl Froehlich is offline
 
Join Date: Dec 2007
Location: Dogwood Airpark (VA42)
Posts: 1,111
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Quote:
Originally Posted by Jesse View Post
I have seen it mounted to the tunnel cover in a number of installations. Just make sure you use nutplates to mount it there so you can unscrew it from the tunnel cover to remove the tunnel cover. Usually I see flex lines connected to it when mounted this way.
What Jesse said - but I made a temporary plate to hold the valve in the final postion with the cover off. That way I was able to fabricate the aluminum lines to the valve. 450 hours and 5 years - all is well.

I did put a 45 degree bulkhead fitting on each side of the tunnel instead of trying to have a single piece of aluminum from the valve to the tank as shown in the plans. This greatly simplified running the fuel lines.

Carl
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  #7  
Old 07-01-2017, 06:39 PM
togaflyer togaflyer is offline
 
Join Date: Apr 2013
Location: Cleveland Ga
Posts: 380
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I did a modification to the cover, splitting it just forward and aft where the valve is located, this way the portion of the cover the valve mounts to does not require removal for the conditional. I could make a bracket and drop the valve 3 or 4 inches, but then I will need a valve extension. Would I need to order the extention from Andair direct. The good news is the FWF engine and prop are all done. Just need to order lines from Tom. Now deciding what to tackle next, the cowling or the wheel pants and fairings.
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  #8  
Old 07-03-2017, 08:18 AM
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Bill.Peyton Bill.Peyton is offline
 
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Hi Rich,
I mounted my Andair selector valve at the same height as the plans location using a newly fabricated bracket. I purchased the extension from ACS. You might check and see if they have them in stock.
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  #9  
Old 07-03-2017, 10:51 AM
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rleffler rleffler is offline
 
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Location: Delaware, OH (KDLZ)
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Quote:
Originally Posted by Bill.Peyton View Post
Hi Rich,
I mounted my Andair selector valve at the same height as the plans location using a newly fabricated bracket. I purchased the extension from ACS. You might check and see if they have them in stock.

I did the same as Bill.

My info is dated, but ACS used to be pretty pricing for the extension. I found it was less expensive to order from Andiar direct or at their booth at OSH.

You will only need 3-4", but the extension is 12". Buddy up with another builder and cut the cost by a half (or two thirds).
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