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  Locating a circuit breaker in Apollo 11 CM

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Author Topic:   Locating a circuit breaker in Apollo 11 CM
rgarner
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Posts: 1160
From: Shepperton, United Kingdom
Registered: Mar 2012

posted 07-24-2017 05:38 PM     Click Here to See the Profile for rgarner   Click Here to Email rgarner     Edit/Delete Message   Reply w/Quote
I've been searching for a while and found very little, but does anyone know how to find where in the Apollo 11 command module a circuit breaker would be?

Serial number 101608306347.

rgarner
Member

Posts: 1160
From: Shepperton, United Kingdom
Registered: Mar 2012

posted 04-24-2019 08:36 AM     Click Here to See the Profile for rgarner   Click Here to Email rgarner     Edit/Delete Message   Reply w/Quote
Are there any diagrams or blueprints which show the Apollo command module console circuit breakers and reference their serial numbers, use, etc.?

I have an Apollo 11 flown breaker and I really want to track down where it was used.

CIRCUIT BREAKER
SINGLE POLE A/C
L/N N52 1500-069-3
S/N 101608 306347
ME 454-0010-0006
This is a single-line type breaker as shown on Historic Space Systems (pictured below on the right).

Having looked at the CSM displays and controls schematic, I can see that these types of breakers were used on: Panel 4, Panel 5 and Panel 8.

  • Panel 4: Contains ac power switches and circuit breakers for the environmental control, telecommunications, and service propulsion subsystems.

    These circuit breakers were used for the suit compressors and water-glycol pumps of the environmental control subsystem. The circuit breakers are the push-pull reset type.

  • Panel 5: Contains circuit breakers for instruments and the electrical power and environmental control subsystems.

  • Panel 8: Contains circuit breakers for stabilization and control, reaction control, service propulsion, and other subsystems.
From the CSM displays and controls schematic for Apollo 4 it it does have a key (also pictured below), but have so far been unable to see a correlation.

Jim Behling
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Posts: 1395
From: Cape Canaveral, FL
Registered: Mar 2010

posted 04-24-2019 09:12 AM     Click Here to See the Profile for Jim Behling   Click Here to Email Jim Behling     Edit/Delete Message   Reply w/Quote
Drawings are not going to show where a specific serial number was installed. Drawings only show specific type of switch. Serial numbers would be on specific construction documents (which are not drawings or diagrams) for each vehicle.
Those don't likely exist anymore and certainly wouldn't be on the web.

A serial number for an item to be install is not known until the item is withdrawn from stock. Serial numbers are used to differentiate items that have the same part number.

The construction documentation would say install this part number in this location per this drawing and record the serial number.

rgarner
Member

Posts: 1160
From: Shepperton, United Kingdom
Registered: Mar 2012

posted 04-24-2019 10:45 AM     Click Here to See the Profile for rgarner   Click Here to Email rgarner     Edit/Delete Message   Reply w/Quote
That's good to know, thanks. I'm still going to hold out in the hope that someone has the construction documentation I need. I've been surprised before at what paperwork finds its way to the surface.

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