[AR] Re: What happened to the Space Shuttle?
- From: Henry Spencer <hspencer@xxxxxxxxxxxxx>
- To: Arocket List <arocket@xxxxxxxxxxxxx>
- Date: Tue, 23 Jul 2019 07:46:35 -0400 (EDT)
On Mon, 22 Jul 2019, anthony@xxxxxxxxxxx wrote:
an original, test fired, LMD (pronounced LEM-DEE) LM descent motor... It
had been fired but the documentation didn’t include any details of the
test criteria or duration. Given he amount of char present, it would
have been longer than just a check test or qualification run. I
neglected to ask if the motors were sent to the moon with carbon in them
or launched without ever being fired.
NASA TN D-7143, the Apollo Experience Report on LM descent propulsion,
mentions all flight engines undergoing an acceptance firing -- length not
specified -- before delivery. (The flight pressure sensors had to be
installed after that, else residual oxidizer caused some etching of the
sensor diaphragms, which messed up calibration.)
Henry
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