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Modified fuel caps

by Stephen Foreman in 912 / 914 Technical Questions 8 years ago

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Re: Modified fuel caps

by Bill Hertzel » 8 years ago

Bill Hertzel

13 1.95k 7.97k

... Run your own test and get real time facts.

And be sure to run your tests with the vents facing Forward or Up on a Rainy day!

This sounds like a great way for water to enter the tanks.
This is a sunny day idea that may prove to be disasterous in the real world.

Vented caps are a bad idea all-round.
If you have ever found water in your tanks, it came in as water.

The condensation theory of water formation is weak at best.
It takes a huge amount of air to produce even a few drops of water.
At 68F, it takes ~375 gallons of air at 100% hunidity to hold One(1) Ounce of water.
That is suprizingly little water for one huge fuel tank!

The vents should be integral to the tanks and routed to below the Fuselage/Wing.
Any over-flow should go overboard without contacting the Fuselage/Wing.

Bill Hertzel
Rotax 912is
North Ridgeville, OH, USA
Clicking the "Thank You" is Always Appreciated by Everyone.

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Re: Modified fuel caps

by Stephen Foreman » 8 years ago

Stephen Foreman

3 14 0

Thanks Bill for your comments.

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