Rockomax Jumbo-64 Fuel Tank

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Rockomax Jumbo-64 Fuel Tank
Part image
Liquid fuel tank by
Rockomax Conglomerate
Radial size Large
Cost (total) 5 750.00 Fund
(dry) 2 812.40 Fund
Mass (total) 36.00 t
(dry) 4.00 t
Drag 0.2-0.3
Max. Temp. 2000 K
Impact Tolerance 6 m/s
Research Advanced fuel systems.png Adv. Fuel Systems
Unlock cost 24200 Fund
Since version 0.18
Part configuration fuelTankJumbo-64
Liquid fuel 2 880 units of fuel
Oxidizer 3 520 units of fuel

The Rockomax Jumbo-64 Fuel Tank provides fuel to attached liquid fuel engines, and was the largest liquid fuel tank prior to 0.23.5. The appearance of the tank, including the rust-like orange colour, is inspired by Space Shuttle external tank. However, unlike the real life counterpart containing liquid hydrogen and liquid oxygen, the Jumbo-64 contains the unspecified liquid fuel and oxidizer.


That's how many fuel tanks can SAFELY go on the same craft.

As of 0.23[outdated], this tank does not transfer heat effectively. Engines attached directly to it and running at full throttle (especially Mainsails or LV-Ns) risk overheat. Throttling down, or placing a fuel tank (such as the Rockomax X200-8 Fuel Tank) or structural component in between the engines and the Jumbo-64 fuel tank will fix this. Another workaround for this problem is to stack two Rockomax X200-32 Fuel Tanks in place of a Jumbo-64. Together they have exactly the same mass, fuel capacity, drag, and dimensions but different part count which might impact on the performance of the game.

The RE-M3 "Mainsail" Liquid Engine produces less heat in 0.22. Its heat production was lowered from 500 to 400, reducing the chance of overheating. The LV-N "Nerv" Atomic Rocket Motor will no longer overheat under this tank as of 0.22. The T-1 Toroidal Aerospike "Dart" Liquid Fuel Engine has a higher maximum temperature as of 0.22, also reducing the risk of overheating.

There is a "01" label near the top lip of the fuel tank.

The Jumbo-64 is supposedly shipped to the Kerbal Space Center in a Mk3 Cargo Bay CRG-100.


Before 0.23.5, it was the heaviest part, when fueled, and the largest tank. Both records go the Kerbodyne S3-14400 Tank with its release. Additionally the LFB KR-1x2 was released in 0.23.5 which can store the same amount of fuel and provide additional engines. So even between all tanks with a large radius or smaller, the Jumbo-64 tank is not the heaviest part and shares the record of the largest tank of that radius with the LFB KR-1x2. Of the tanks introduced in 0.23.5, it's only larger than Kerbodyne S3-3600 Tank which is the smallest of the new tanks.

Product description

The largest tank available from Rockomax, the Jumbo-64 holds a vast amount of fuel in a friendly orange insulated container. Contrary to popular belief, the Jumbo-64 is NOT orange flavored and should NOT be tasted.


  • Initial release