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Build for performance. Trusted by profesional RC pilots

Fuel Bladder Tank Rectangular 5.5L 2SQ for Mephisto

Fuel Bladder Tank Rectangular 5.5L 2SQ for Mephisto

Standard rectangular 5.5L 2SQ fuel bladder designed for UAVs, RC turbine jets and aircraft installations requiring increased fuel capacity with a stable standard layout.

€178,00 EUR
€178,00 EUR
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Shipping calculated at checkout.
Weight: 215gr Transparent TPU Standard Line Ships worldwide Manufacturing time: 5-7 business days Designed for Mephisto airplanes

Not sure if this fits your aircraft? Request a custom review →

The Fuel Bladder Tank Rectangular 5.5L 2SQ is a standard fuel bladder designed for UAVs, RC turbine jets and aircraft installations requiring increased fuel capacity in a stable rectangular format.

Its 2SQ layout makes it suitable for medium to large aircraft compartments where a wider and more structured bladder can provide better integration than pillow or cylindrical alternatives. The 5.5L capacity offers a practical middle point between 5L and 6L, providing additional usable fuel volume without moving fully to the largest standard formats.

The transparent TPU construction allows visual inspection of the bladder and fuel system, while selectable fitting and filter options help adapt the configuration to your aircraft installation.

Please note: the carbon tubes shown in the images are sold separately.
Click here to get the carbon tubes and complete your setup.

Dimensions: 

Width: 190mm
Maximum width: 210mm
Tube distance: 200mm
Maximum height: 160mm
Maximum length: 300mm
Weight: 215gr
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Checked before shipping

  • Fittings reviewed

    Correct fitting placement is checked before dispatch.

  • Sealing checked

    Each bladder is inspected to help detect possible sealing issues.

  • Specs reviewed

    Size, layout and selected options are reviewed before shipping.

  • Packed with care

    Each order is protected for transport to reduce handling damage.

WHAT THEY SAY ABOUT US

Trusted by UAV manufacturers, RC pilots and defence integrators worldwide

We've already tested them on the test bench, and there were no problems at all. Next week I'm going to try out the dual-tank setup. Great product! My coworkers are really happy with it (I was already confident in it, hahahaha).

A. C.

A. C.

ARQUIMEA Systems - Spain

We tested your bladders on 15-20 Gs and it was fine. Tomorrow there will be tests on real launchers.
I can see a lot of progress on your side, since our first orders 1 year ago. 😃

J.K.

J.K.

WB ELECTRONICS - Poland

Why choose this bladder?

Built for aircraft installations where reliable fuel delivery, compact integration and mounting flexibility matter.

  • Stable fuel delivery

    Designed to support reliable fuel storage and consistent fuel pickup in UAVs, RC turbine jets and custom aircraft installations.

  • Space-efficient rectangular format

    The 2SQ rectangular shape helps make better use of compact internal aircraft spaces, especially where a rigid tank would be harder to integrate.

  • Practical fitting layout

    Fuel and vent fittings are arranged to support clean fuel line routing and reliable system integration.

  • Configurable installation

    Select compatible fittings, filter and anchoring options to adapt the bladder to your fuel system layout and mounting requirements.

Materials & testing

Technical details for safe and reliable use.

  • Transparent film construction

    High-strength transparent film for fuel containment and visual inspection.

  • Fuel-compatible design

    Designed for compatible UAV and turbine aircraft fuel system applications.

  • Pressure tested

    Pressure tested during manufacturing at 0.15 bar.

  • Important use note

    Not designed to be inflated or operated as a pressure vessel.

Need a fully custom bladder?

Your aircraft should not adapt to a standard tank. Your fuel bladder should adapt to your aircraft.

If this product does not match your available space, fitting layout or mounting requirements, we can manufacture a custom bladder tailored to your project specifications.

Open Configurator

FAQs

Are the tanks pressurisable?

No.
Our bladder tanks are not designed to operate under internal pressure. They function by gravity or with external pumping systems. Pressurising them may compromise the integrity of the material, cause leaks, or even result in structural damage. They should never be used as pressurised vessels.
Our bladder tanks should not be inflated or pressurised. All tanks have passed a leak test, carried out at 0.15 bar on a test bench, under controlled conditions, with a precision pressure gauge and a redundant pressure regulator system. It is strongly recommended that ANSI be consulted before any pressure test is performed. ANSI will reject any warranty claim resulting from overpressurization due to improper testing. Over-pressurization may elongate the bladder film and/or damage the bladder seams without visual evidence.

How are the tanks attached to the fuselage or aircraft structure?

The tanks are designed with a system of reinforced lateral channels, allowing them to be securely attached to the fuselage or structure using carbon tubes or fixing rings. On high-load aircraft (Gs), it is essential to consult a technician to ensure the installation is compatible with operational loads. We can provide fixing kits or specific configurations upon request.

What is the expected lifetime of the tanks?

The service life of our tanks depends on the type of use, environmental conditions, and level of care. Under normal operating conditions, the expected service life is a minimum of 50 flights and can be extended with proper maintenance.

Several factors can shorten the service life:

  • High stresses or high G-forces (e.g. very aggressive aerobatic flights, catapult launch systems, or similar).
  • Contact with incompatible substances.
  • Wear caused by rubbing against abrasive or sharp elements.
  • Incorrect storage (e.g. folded with fuel residues inside).

What care and maintenance do they require?

To ensure maximum performance and durability, we recommend:

  • Regular internal and external cleaning, especially after each prolonged use.
  • Dry, shaded storage, properly folded and free from fuel residues.
  • Regular visual inspection: look for signs of wear, cracks, delamination, or deformation.
  • Avoid contact with incompatible chemicals.
  • In the case of prolonged storage, apply preservatives recommended for elastomeric materials.
Specific maintenance guides are available upon request directly from our technical team.

What fuels are the tanks compatible with?

Our tanks are designed to be compatible with a wide range of fuels: petrol, diesel, Jet A-1, AVGAS, among others.
Always check the product data sheet or consult our team before storing special blends or biofuels.

Can I use these tanks in aircraft or military vehicles?

Yes, many of our models are designed for mobile applications, including aircraft, boats and land vehicles.
However, for aeronautical applications, prior technical validation and compliance with local regulations is always recommended. We can provide customised advice for defence or aviation projects.

Do you have any further questions?
Don't hesitate to write to us via the contact form or our email:
orders@ansisl.com

Complete your fuel system

Add the compatible accessories required for your installation, including carbon tubes, fittings and fuel system components.

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