[AR] Re: supersonic retro (was Re: Re: Falcon 9 flight today)

  • From: Chris Jones <clj@xxxxxxxxx>
  • To: arocket@xxxxxxxxxxxxx
  • Date: Wed, 02 Oct 2013 14:02:51 -0400

On 10/2/2013 1:32 PM, Henry Spencer wrote:


The Apollo LM did supersonic retro-propulsion down to landing, but that
was in vacuum.
Nor were they the first to use "retro-propulsion" to effect a landing on the moon (both Lunas and Surveyors preceded them). But doesn't the "sonic" part of supersonic imply non-vacuum conditions?

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