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  #21  
Old 10-20-2017, 04:49 PM
Harvey rv12 Harvey rv12 is offline
 
Join Date: Apr 2015
Location: Seattle
Posts: 138
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I certainly owe ya a small prize!
I learned there is a lot more to a fuel system than just a filler cap and an outlet to the engine.

Design of vent line to run down below the tank to prevent fuel running out if upside down.

Return line raised above the high fuel level for constant head to keep accurate fuel consumption readings.

What I am still confused about is the dwgs for the newer vent line attachment show a plastic "t" line at the top of the vent tube, with 2 lines running to the bottom of the fuselage. Is that some kind of anti siphon system ?.
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  #22  
Old 10-20-2017, 04:56 PM
rvbuilder2002 rvbuilder2002 is offline
 
Join Date: Jul 2005
Location: Hubbard Oregon
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Quote:
Originally Posted by Harvey rv12 View Post

What I am still confused about is the dwgs for the newer vent line attachment show a plastic "t" line at the top of the vent tube, with 2 lines running to the bottom of the fuselage. Is that some kind of anti siphon system ?.
That is exactly what it is for

BTW, avoiding fuel draining if the airplane ended up upside down was not even a consideration as a reason for the change......
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  #23  
Old 10-20-2017, 04:59 PM
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Piper J3 Piper J3 is offline
 
Join Date: Nov 2014
Location: Hinckley, Ohio
Posts: 714
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Guess I didn't win the RV-12iS...

Scott - have a nice weekend. I think I speak for all... Thanks for all you do on this forum.

Oh, and it was a pleasure meeting you at KOSH this summer.
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Jim Stricker
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80 hrs Flying Aeronca Chief 11AC
1130 hrs Flying 46 Piper J-3 Cub
RV-12 E-LSA #120058 AWC 7/12 Bought Flying 10/2015 with 48TT - Hobbs now 315
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