[AR] Re: Falcon Heavy use cases

  • From: Henry Vanderbilt <hvanderbilt@xxxxxxxxxxxxxx>
  • To: arocket@xxxxxxxxxxxxx
  • Date: Thu, 8 Feb 2018 16:20:24 -0700

On 2/8/2018 3:39 PM, John Schilling wrote:

On 2/8/2018 1:15 PM, Henry Spencer wrote:


And like LOX, on a flight stage, methane shouldn't require insulation unless you've got some special constraint (like, say, fragile orbiter tiles hanging downwind of the tank).

But you lose some of that benefit with the extra precautions you have to take against inadvertent mixing of fuel and oxidizer.  Which is always bad, but extraordinarily bad when they are miscible in a common liquid temperature range.

Common bulkheads, for example, may not be possible without introducing a mass detonation hazard that makes catastrophic failure of large solid motors look benign.


Yup. A couple kilotons of LOX-LCH4 propellant plus a flame pit big enough for it to mix in means never, ever again being able to buy broken-glass coverage for WAY too many miles radius...

Not to mention a spot in the record books. What's the energy yield-per-mass multiplier of stoichometric LOX-CH4 compared to TNT again?

Henry V

Other related posts: