[AR] Re: APCP properties, was Re: Re: starship abort?

  • From: Henry Spencer <hspencer@xxxxxxxxxxxxx>
  • To: Arocket List <arocket@xxxxxxxxxxxxx>
  • Date: Thu, 27 Apr 2023 22:35:07 -0400 (EDT)

On Fri, 28 Apr 2023, Troy Prideaux wrote:

For really big stuff, it would make more sense (to me) to employ static
mixing technology instead of large planetary.

Continuous-flow mixing (don't know exactly what technology) was planned for ASRM, the post-Challenger attempt at an improved SRB. At the time, it was considered a significant development risk, so I gather it hadn't been done before for solid-rocket fuels.

All moot in the end, because ASRM ran so far behind schedule and over budget that Congress killed it. The one little snag was that the space-station people had been counting on ASRM's slightly higher performance. So folks looked around hastily for some other way of getting a bit more payload to orbit with the Shuttle, and that's where the aluminum-lithium version of the External Tank came from.

Henry

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