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Author Topic:   Satellite clock on Friendship 7 (MA-6)

Posts: 10
From: Perth, Western Australia
Registered: Apr 2020

posted 06-14-2020 08:28 PM     Click Here to See the Profile for pbrowne   Click Here to Email pbrowne     Edit/Delete Message   Reply w/Quote
I am looking for some detailed photos or drawings of the Satellite Clock in MA-6 (Friendship 7).

I have seen the following, but would like more detail, e.g. the adjustment dial on the clock itself:

New Member

Posts: 2
From: Norway
Registered: Jun 2020

posted 06-17-2020 06:31 PM     Click Here to See the Profile for asbjos     Edit/Delete Message   Reply w/Quote
For a detailed description of the satellite clock, see the Mercury Familiarization Manual, chapter 12-22 (page 367).

While the time of day clock is hand wound, it is apparently not possible for the astronaut to adjust the time.

However, the Flight Operations manual has a step in the countdown checklist at T-90 minutes for the satellite clock, where the astronaut is supposed to wind the clock knob, and check that the displayed time is correct with ground control.

So it was probably set by a technician before the flight.

I have no knowledge of how long the clock could run without rewinding, but as a reference, the Earth Path Indicator was supposed to run at least 20 hours without rewinding.

One can assume that the clock would run longer than that, and maybe even longer than any mission possible with the Mercury capsule (a couple of days).

The MA-6 Flight Operations Manual is here: Checklist item about the clock is point 41b on page 13.

Lou Chinal

Posts: 1343
From: Staten Island, NY
Registered: Jun 2007

posted 06-25-2020 08:37 PM     Click Here to See the Profile for Lou Chinal   Click Here to Email Lou Chinal     Edit/Delete Message   Reply w/Quote
I sat in the prototype at McDonnell. The first thing I did was to wind up the clock. It ran for the two days I was there.

All times are CT (US)

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