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  Apollo 1 fire: Location of initial spark

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Author Topic:   Apollo 1 fire: Location of initial spark
MCroft04
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Posts: 1647
From: Smithfield, Me, USA
Registered: Mar 2005

posted 05-01-2005 09:32 AM     Click Here to See the Profile for MCroft04   Click Here to Email MCroft04     Edit/Delete Message   Reply w/Quote
I just got around to reading "Fallen Astronauts" (great book so far) and found some info on the cause of the Apollo 1 fire that surprised me.

Everything I've previously read said the most likely cause of the fire came from a spark beneath Gus' couch. However, the authors of "Fallen Astronauts" suggest (page 86) that the fire was probably started in or near "a small compartment for lithium hydroxide," which was "mounted on the inner wall of the spacecraft beside Grissom," which sounds different from the under the couch location. Anyone have more info on this?

nasamad
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Posts: 2141
From: Essex, UK
Registered: Jul 2001

posted 05-01-2005 01:59 PM     Click Here to See the Profile for nasamad   Click Here to Email nasamad     Edit/Delete Message   Reply w/Quote
In the area to the left of Grissom's couch was the Environmental Control Unit. Some of the storage lockers located to Grissom's left, beneath him and more near the feet of Ed White in the center couch were used for storing the lithium hydroxide canisters.

These were used for scrubbing the CO2 from the air during flight (see "Apollo 13" movie for a great explanation).

As far as I can remember the canisters weren't thought to be the cause of the fire, but the fact that temporary wiring had been routed through the opening of one of the lockers or the panels of the ECU and the the sharp edge of the locker door had worn away some of the wiring insulation. This bare wire is thought to be the cause of the spark that caused the fire.

Stephen Clemmons
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Posts: 108
From: Wilmington, NC, New Hanover
Registered: Aug 2004

posted 05-07-2005 05:56 PM     Click Here to See the Profile for Stephen Clemmons   Click Here to Email Stephen Clemmons     Edit/Delete Message   Reply w/Quote
As far as I know, we didn't stow any surplus canisters under the seats for that test. One reason was they were in a hermetically sealed bag and when inserted in the storage lockers, had to be removed from the bags.

Once exposed or used, each canister was shipped back to the factory for re-servicing and repackaging. (Reason, we didn't want to take a chance on using a used canister.) Only enough canisters were installed to perform the test.

I don't recall any sharp edges on the framework or doors that would cut a wire. One might fray or chaff a wire if it was rubbed against it for a long time as anything would against a narrow metal edge. We were in and out of the areas working on various things and I can assure you, if there was a sharp edge, we would have found it and filed it off. We were always on the alert for such things mainly because if an astronaut was in his flight pressure suit and brushed up against a sharp edge or burr, or ran his gloves over a sharp edge, it could puncture his suit. We often ran a cloth over these edges to detect a sharp or hang areas.

Even the so called sharp edge on the lower door panel of the ECU that was supposed to have chaffed a wire was not considered to be sharp. It was narrow but it wouldn't cut anyone or anything.

As for the story of the wire in "Fallen Astronauts," I don't believe it was based on fact or what the investigators found during their investigation.

There are many theories, Scott Grissom Has one, I have one and there are probably many others out there. The problem with all these various theories is no one can really say what happened and the only real evidence is what the many investigators found.

But to come up with a new theory sells books.

The only thing we can be sure of is that it started on the floor directly under Grissom's left foot just in front of the ECU door, well away from the canisters and storage lockers. This is well documented by all the facts known and the fact that Grissom's left boot was burned off and his suit was 70% destroyed, mostly on the left side

Soot marks and directional burn tracks were evidence of flame travel in one direction only, upward. This supports the theory that the investigators came up with. At first we thought that a Lithium Hydroxide canister had exploded, but it was ruled out because none were burned from the inside out.

The subject canisters, or what was left of them, found in the ECU were cut open and no evidence could be found of an internal fire or explosion.

As for what writers say, take most of it with a grain of sand and this statement from the book has all kind of sand on it.

I hope this explains some of it.

All times are CT (US)

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