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There are quite a number of strict FAA requirements for aircraft fuel tanks (must withstand such-and-such many Gs from such-and-such directions, must be inerted, must be puncture-resistant, et cetera, et cetera). Rocket-powered aircraft generally have oxidizer tanks as well as fuel tanks;1 does the FAA have special requirements for these, or are they simply counted as fuel tanks for regulation-compliance purposes?

Or is the FAA waiting to clarify this until someone actually tries to get a rocket-powered aircraft certified as anything other than an experimental aircraft?


1: An exception would be if an aircraft were powered by a monopropellant rocket.

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    $\begingroup$ Before the fatal launch of SpaceShipTwo, someone of them commented: "Fortunately we do not have so many requirements as for the airplanes". $\endgroup$ – Giacomo Catenazzi Mar 22 at 9:42

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