why are there not CNG airplanes?

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It seems like you can power pretty much anything on natural gas or propane, why not jet engines or at least prop planes? Is it a weight issue?

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Anonymous 0 Comments

Weight. The tanks holding CNG have a withstand a lot more force than those holding standard aviation fuel. That means they have to be larger and heavier, which is makes it very hard to incorporate into aircraft designs.

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