Showing posts with label Buzz Aldrin. Show all posts
Showing posts with label Buzz Aldrin. Show all posts

Wednesday, February 6, 2013

Speedmaster anomaly?



Ever since I first began my interest for the Speedmaster Moon watch, I asked myself: surely, given the importance of timing, NASA would have built timing modules into the space suits...a couple of stopwatches, mission timer etc...probably in a specially designed nylon housing with ultra large dials and indices, hands and pushers, backlight etc. It seems a little illogical that NASA would say: oh, we need a timer for EVAs, lets just buy a watch off the shelf...

After using the Speedmaster in space twice (Gemini 12; Apollo 11) Buzz Aldrin gives us a first-hand insight as to the effectivenes of the Speedmaster as a space watch:

"I had a watch on but I don't think I looked at it. Which would probably say that I should have had it set at something so that it was just not a normal time going around, but going from some specific...It was a lousy watch to have on the surface. It just didn't give good numbers as far as a stopwatch type thing. To have gone to all that expense and then to have crews out on the surface with just an ordinary watch, in retrospect, is a mistaken priority somewhere." Source: http://history.nasa.gov/alsj/a11/a11.evaprep.html

And upon completing the EVA on the lunar surface (closeout):

111:34:43 Aldrin: I think my watch stopped, Neil.
111:34:46 Armstrong: Did it? (Pause)
111:35:01 Aldrin: No it didn't, either. (Garbled) second hand. (Pause)
Source: http://history.nasa.gov/alsj/a11/a11.clsout.html

Thinking about it logically, a regular watch worn outside the space suit must have been difficult to read, to say the least. Buzz Aldrin appeared to have problems reading his. In shadow - impossible. Pressing the pushers must have been a problem too, but I am not that sure they were used while "moon-walking". Muliple timing tasks - forget about it.

But, (amazingly to me) - NASA has stuck to off-the-shelf Omegas since. That's great for us who "dig" the whole moon-watch story, but has anybody else ever wondered at the "anomaly" of NASA using a regular sized, common-or-garden wristwatch (with a tachymeter scale ) as one of their most important pieces of EVA equipment, with essentally no development or change after 40 years?

Omega Speedmaster "Chronometer" donning & hacking, EVA preparation, Apollo 11 protocols




References to the implementation of the chronometers can be found during EVA preparations, i.e after the Eagle Lunar Module has landed.

The first reference comes on page Sur-27 of the Surface Checklist (at 106h49), where the begin donning the PLSSs (Portable Life Support System or backpack) and the Oxygen Purge Systems (OPSs). Chronometers are fitted to the RH gloves, which at this stage are not donned:




Page SUR-37 mentions the chronometer on the RH gloves:




The gloves themselves are donned at 108h42:


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Prior to the EVA, hacking of the chronometers takes place:


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And a little later:


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And the rest, as they say, is history...

References/Credits:

http://history.nasa.gov/alsj/a11/a11.evaprep.html

http://history.nasa.gov/alsj/a11/surface11.html