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Author
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Topic: Mounting the Apollo A7L spacesuit neck ring
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Apolloman
Member Posts: 233
From: Ledignan, Gard (30), France
Registered: Mar 2009
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posted 04-04-2024 04:17 PM
   
I have a few questions about mounting the neck ring on the Torso Limb Suit Assemblies (TLSA) of the Apollo A7L spacesuit.If I've understood the description correctly, this neck ring consists of two sub-assemblies: an immobile lower part, attached to the TLSA, and a mobile upper part. I understood that the lower part was fastened with a compression band clamp:  In addition to this band compression collar, was the TLSA also glued to the neck ring to prevent any leaks, or not? Does anyone have a profile photo of a real TLSA neck ring (laid flat on a table) to give me an idea of its thickness (height)? I can only find photos of replicas and shots taken from above. |
DG27
Member Posts: 270
From: USA
Registered: Nov 2010
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posted 04-09-2024 03:08 AM
I have not seen any references to the necking being glued. If it was glued, then replacement would probably damage the suit. So, I think that it was only clamped. (but I suppose if I was out on the lunar surface, I would want it glued as well).The total height of the suit side necking is 1.10 inches. This measurement includes the part behind the clamp. |
Apolloman
Member Posts: 233
From: Ledignan, Gard (30), France
Registered: Mar 2009
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posted 04-09-2024 03:48 AM
Always the same one to answer me, a very big thank you DG27.(No glue.. Wouah!! The engineers had to be sure of what they were doing.) One last question: the part behind the clamp was it smooth or grooved? (as shown in the image below). Warning: this is a replica.  |
DG27
Member Posts: 270
From: USA
Registered: Nov 2010
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posted 04-09-2024 12:10 PM
It is grooved to insure a good seal. |
Apolloman
Member Posts: 233
From: Ledignan, Gard (30), France
Registered: Mar 2009
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posted 04-10-2024 02:49 AM
Ok, thanks. And ah, "while I've got you..."Do you know the weight (in kg or lb) of the bubble helmet (polycarbonate shell and aluminum ring) and the thickness of the transparent shell? (I had read it on an old thread but couldn't get my hands on it again.) (I also seem to remember that the thickness is different depending on the zone of the bubble.)  |
Spacehardware
Member Posts: 146
From: Durley
Registered: Jan 2008
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posted 04-12-2024 08:33 AM
An A7LB bubble with neck ring only (no vent pad, feed port, valsalva etc.) weights 830g. Thickness at the feedport varies between 2.15 and 2.65mm. Many Bothans died to bring us this information... |
Apolloman
Member Posts: 233
From: Ledignan, Gard (30), France
Registered: Mar 2009
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posted 04-12-2024 05:54 PM
Thanks. Can these results be applied to an A7L bubble helmet?And how much that would make for a full helmet (with vent pad, feed port, valsalva)? |
Spacehardware
Member Posts: 146
From: Durley
Registered: Jan 2008
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posted 04-13-2024 10:22 AM
Yes on the A7L version. Sorry, can't help with all-up weight — I am missing the vent pad on my helmets (hint! Anyone got a spare they want to sell/swop?) Might want to send a request to then National Air and Space Museum for the weight - they are usually extremely helpful. |
Apolloman
Member Posts: 233
From: Ledignan, Gard (30), France
Registered: Mar 2009
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posted 04-13-2024 02:42 PM
I found an old conversation and you don't give the same result, or is it complementary to the answer you gave me? |
DG27
Member Posts: 270
From: USA
Registered: Nov 2010
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posted 04-14-2024 05:00 PM
I had to order additional weights for my scale. When they arrive in a few days, I can weigh a helmet. |
Apolloman
Member Posts: 233
From: Ledignan, Gard (30), France
Registered: Mar 2009
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posted 04-16-2024 04:33 PM
I understand you own a bubble helmet... Is it complete?If so, would it be possible for you to please take a picture of the feedport with the internal flap raised to see how it is mounted. |
Apolloman
Member Posts: 233
From: Ledignan, Gard (30), France
Registered: Mar 2009
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posted 07-21-2024 02:27 PM
I'm coming back to this discussion to ask an additional question because I couldn't find the information anywhere.What material was the compression band clamp made of? In the photo of the first post, you can see that the clamping system is made of steel, but what about the rest? |
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