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Fuel bags

Old 02-09-2024, 05:35 PM
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BarracudaHockey
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Default Fuel bags

If you're in the US or coming to the US and flying under AMA rules/insurance, the fuel bag situation is resolved and they are now approved for use.

Here's the relevant change to 501-A
510-A.pdf

5. The fuel tanks shall be of rigid construction with consideration given to burst and puncture resistance. Consideration shall be given that non-metallic fuel lines may not be able to contact hot parts of the engine as installed. Bag style fuel cells are permitted under the following conditions:

a. is a multi-layer fuel cell that is purpose built for the application and designed to be resistant to rips, tears, hardening and cracking from kerosene/jet fuel exposure.

b. is mounted in such a way as to ensure no contact with rough surfaces capable of causing abrasion between the tank and any aircraft surface.

c. is mounted away from or protected from heat exposure from the engine(s) and pipe(s).

d. is filled with a pressure sensing fueling system to ensure the cell isn't over pressurized during fueling.

e. NO plasma/IV bags are permitted.

Last edited by BarracudaHockey; 02-09-2024 at 05:42 PM.
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Old 02-09-2024, 06:12 PM
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Glad they are updating the rules. Not familiar with fuel bags. Is a uat needed with a fuel bag?
Old 02-09-2024, 06:40 PM
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Thanks for the hard work Cuda!!
Old 02-09-2024, 06:57 PM
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Originally Posted by qcsteve
Glad they are updating the rules. Not familiar with fuel bags. Is a uat needed with a fuel bag?
No, used properly they are completely bubble free.
Old 02-10-2024, 01:17 AM
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https://www.fuelbag.de/

Use google translate and you can get information and ideas.

Regards,
Old 02-10-2024, 08:05 AM
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Which fueling system is allowed? I think jetcat fuel pump senses pressure but not sure. Plus it is always out of stock it seems.
Old 02-10-2024, 08:25 AM
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Originally Posted by BarracudaHockey
If you're in the US or coming to the US and flying under AMA rules/insurance, the fuel bag situation is resolved and they are now approved for use.

Here's the relevant change to 501-A
Attachment 2273862

5. The fuel tanks shall be of rigid construction with consideration given to burst and puncture resistance. Consideration shall be given that non-metallic fuel lines may not be able to contact hot parts of the engine as installed. Bag style fuel cells are permitted under the following conditions:

a. is a multi-layer fuel cell that is purpose built for the application and designed to be resistant to rips, tears, hardening and cracking from kerosene/jet fuel exposure.


b. is mounted in such a way as to ensure no contact with rough surfaces capable of causing abrasion between the tank and any aircraft surface.

c. is mounted away from or protected from heat exposure from the engine(s) and pipe(s).

d. is filled with a pressure sensing fueling system to ensure the cell isn't over pressurized during fueling.

e. NO plasma/IV bags are permitted.
I am not a jet person so I may be off base here, but doesn't subparagraph a. above describe a non-rigid fuel tank which goes against paragraph 5?
Old 02-10-2024, 10:11 AM
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grbaker
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I am not a jet person so I may be off base here, but doesn't subparagraph a. above describe a non-rigid fuel tank which goes against paragraph 5?
paragraph 5 reads:
​​​​​​​5. The fuel tanks shall be of rigid construction with consideration given to burst and puncture resistance. Consideration shall be given that non-metallic fuel lines may not be able to contact hot parts of the engine as installed. Bag style fuel cells are permitted under the following conditions:
Old 02-10-2024, 01:54 PM
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Well that took a while but glad it's done.
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Old 02-10-2024, 02:56 PM
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Originally Posted by qcsteve
Glad they are updating the rules. Not familiar with fuel bags. Is a uat needed with a fuel bag?
probably not an overly bad idea to have a UAT anyway,

just in case there is a suction leak somewhere in the system, pulling air you don't know about, until it is already too late.
Old 02-10-2024, 07:58 PM
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Finally! Can't believe it took AMA this many years to approve the fuel bags!
Old 02-15-2024, 06:08 AM
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Originally Posted by qcsteve
Glad they are updating the rules. Not familiar with fuel bags. Is a uat needed with a fuel bag?
no, you do not need a uat, just the fuelbag
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