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carl.froehlich(at)verizon
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 Posted: Sat Dec 12, 2015 2:40 pm Post subject: Fuel Vent mods |
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All,
Some good discussions of late on fuel vent modifications to mitigate icing. Attached photos is what I back fitted today. The 3/8” piece of aluminum tubing out in the breeze has a piece of aluminum screen material epoxied over an angle cut to be the barrier for mud dabbers and such. The down side is I suspect this would present a nice place for ice to build up. I added a ‘T’ in the vent line and added a check valve such that if the external vent opening becomes blocked the tank sucks air from the wing root area – that area would be free of ice. With the check valve the vent still provides a positive pressure on the tank when flying, and if gas does burp out (as typical after filling and the sun heats the tank) the gas is still directed out of the wing.
The check valve opens easily with just a slight vacuum. We got these valves from McMaster-Carr: http://www.mcmaster.com/#5492k11/=107mk5o
Carl
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gengrumpy
Joined: 07 May 2013
Posts: 131
Location: Tullahoma, TN
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| Posted: Sat Dec 12, 2015 6:46 pm Post subject: Fuel Vent mods |
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A much easier solution is to drill a small (#40) hole in the back side of the vent about half way up to the wing.
grumpy
| Quote: | On Dec 12, 2015, at 4:36 PM, Carl Froehlich <carl.froehlich(at)verizon.net (carl.froehlich(at)verizon.net)> wrote:
All,
Some good discussions of late on fuel vent modifications to mitigate icing. Attached photos is what I back fitted today. The 3/8â piece of aluminum tubing out in the breeze has a piece of aluminum screen material epoxied over an angle cut to be the barrier for mud dabbers and such. The down side is I suspect this would present a nice place for ice to build up. I added a âTâ in the vent line and added a check valve such that if the external vent opening becomes blocked the tank sucks air from the wing root area â that area would be free of ice. With the check valve the vent still provides a positive pressure on the tank when flying, and if gas does burp out (as typical after filling and the sun heats the tank) the gas is still directed out of the wing.
The check valve opens easily with just a slight vacuum. We got these valves from McMaster-Carr: http://www.mcmaster.com/#5492k11/=107mk5o
Carl
[img]cid:4BF3C348-65C0-42C5-B94B-5D5D545ED999[/img][img]cid:8B9E2B0D-E4D4-4CBE-965A-F346A1E85DF1[/img]
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| | - The Matronics RV10-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?RV10-List |
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