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  Possible Atlas 113-D part from Mercury-Atlas 8

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Author Topic:   Possible Atlas 113-D part from Mercury-Atlas 8
Skytrotter
Member

Posts: 18
From: Indianapolis, IN USA
Registered: Sep 2013

posted 09-03-2013 06:48 AM     Click Here to See the Profile for Skytrotter   Click Here to Email Skytrotter     Edit/Delete Message   Reply w/Quote
I purchased several Rocketdyne items from Norton Sales on July 23, 2013.

One particular part has a tag on it that states "Removed from 113D." The sales person from Norton Sales thought it might be from an Atlas missile, but wasn't sure.

Of course Atlas 113-D was the Atlas that launched Wally Schirra on his Mercury Sigma 7 mission in October 3, 1962.

I've done some Internet research to see if there is any mention of a valve being replaced on 113-D, but the only reference I could find that mentioned a part replacement was a valve on the Mercury capsule, and I doubt that would have been a Rocketdyne part.

I assume that this Rocketdyne valve was related to the engines or the missile/engine interface, but I haven't found any good photos or documents on the "boat tail" end of the Atlas. Because of the boat tail end is covered with a insulation blanket, good photos of the engine/missile interface are rare. It is possible that this valve was removed at Convair long before the missile was shipped from the factory.

Any help in locating information about this part would be greatly appreciated!

Several photos and part/serial numbers are located at this site. — Mark Trotter

Lou Chinal
Member

Posts: 1013
From: Staten Island, NY
Registered: Jun 2007

posted 09-04-2013 01:53 PM     Click Here to See the Profile for Lou Chinal   Click Here to Email Lou Chinal     Edit/Delete Message   Reply w/Quote
I am familiar with diagrams of the Atlas plumbing but as far as looking at a certain valve or part, I don't know.

My best guess is to call Paul Thomarios of Akron Oh. He restored #D-152 a few years ago.

ApolloEra
Member

Posts: 12
From: Woodland Hills, CA, USA
Registered: Feb 2013

posted 09-11-2013 02:44 AM     Click Here to See the Profile for ApolloEra   Click Here to Email ApolloEra     Edit/Delete Message   Reply w/Quote
Welcome to collectSPACE and the adventure of rummaging through a dark and dusty warehouse! I live about 15 miles from Norton and visit every month or two. That's an great find... I'm more of an Apollo guy so unfortunately I can't help you too much with this one. The part doesn't look familiar, but the 113-D sounds like a strong possibility. Keep us posted...

Skytrotter
Member

Posts: 18
From: Indianapolis, IN USA
Registered: Sep 2013

posted 10-26-2013 06:44 PM     Click Here to See the Profile for Skytrotter   Click Here to Email Skytrotter     Edit/Delete Message   Reply w/Quote
I have no real new information on this item, however I did do a little more research on the information on the tag that is attached to the valve.

Writing on the tag attached to the valve states...

Removed from 113D
Per R1079-53
GMA- ECP MA2-41

I still assume that "113D" refers to the Atlas D of Wally Schirra's Mercury-Atlas 8 - Sigma 7.

I did find a few documents that suggest the "ECP" stands for "Engineering Change Proposal" and that "MA2" is the booster engine cluster of the Atlas D, otherwise known as XLR89-5. Perhaps "MA2-41" is a specific engine number.

My understanding is that the Atlas D used a single turbo pump to provide fuel and oxidizer to both booster thrust chambers. I believe the sustainer engine had its own turbopump since the booster engines were jettisoned in later in flight. See: XLR89-5.

I have not found any references to what "Per R1079-53" might mean. Perhaps this is a directive to remove this part from the Atlas while it was at Convair or while the engine was at Rocketdyne. If the "Removed from 113D" refers to the Atlas D, then it seems that the part would have been removed at Convair.

All times are CT (US)

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