[AR] Re: danger (was Re: MSR reactors.)
- From: Henry Spencer <hspencer@xxxxxxxxxxxxx>
- To: Arocket List <arocket@xxxxxxxxxxxxx>
- Date: Tue, 16 Jul 2019 18:59:54 -0400 (EDT)
On Sat, 13 Jul 2019, anthony@xxxxxxxxxxx wrote:
"Pogo occurred in the Saturn V all the way up to Apollo 17... there was
often a delay because engineers needed time to analyze the results from
a Saturn V flight, and in most cases the next Saturn V was already
"stacked" in the assembly building and couldn't be easily modified."
Indeed, one reason MSFC had for lying low on the center-engine Pogo was
that a Pogo suppressor for that engine had already been designed and
qualified, and would be incorporated on all Saturn Vs from Apollo 14's on.
But 13's was already stacked, and the center-engine Pogo problem on 12 had
been annoying but not really serious, so they decided it wasn't worth
unstacking for the fix.
Henry
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