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Author
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Topic: Apollo A7L: Securing helmet and neck ring
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Apolloman
Member Posts: 148
From: Ledignan, Gard (30), France
Registered: Mar 2009
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posted 12-08-2009 10:30 AM
   
I know how to fix the bubble helmet on the neck ring.From what I understand the neck ring is an 8 pin "shrink" spring-mounted in a groove and bind in the groove of the helmet (see photo blue circle). The final lock is initiated the lock subassembly (orange in photo) to the right... In making this gesture that actuates a cam in the neck ring that is blocking the return of pines. 
My questions are: - The cam blocks does one or all pins?
- How to make pins out of the groove of the bubble helmet?
Because of the language barrier ...Explanatory drawings are welcome. Thank in advance for your answers |
Philip
Member Posts: 5952
From: Brussels, Belgium
Registered: Jan 2001
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posted 12-08-2009 12:16 PM
Where was that photo taken? |
Apolloman
Member Posts: 148
From: Ledignan, Gard (30), France
Registered: Mar 2009
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posted 12-08-2009 05:19 PM
This photo: Unless otherwise note, all photographs taken by Ulrich Lotzmann, Amanda Young, and Bill Ayrey on 10-11 April 2006 at the National Air and Space Museum's Garber Facility Otherwise... nobody has an idea? |
Spacehardware
Member Posts: 125
From: Durley
Registered: Jan 2008
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posted 12-10-2009 05:48 AM
I will take some photos of the inside mechanism and email them to you. Hope they help! |
Apolloman
Member Posts: 148
From: Ledignan, Gard (30), France
Registered: Mar 2009
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posted 12-10-2009 06:02 AM
Thank... Thank, thank, thank, many thank.I hope that with these pictures I could finally understand the mechanism of closure. |
alexylenov
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posted 12-13-2009 12:56 PM
Here is an explanation with photos from my blog. |
Apolloman
Member Posts: 148
From: Ledignan, Gard (30), France
Registered: Mar 2009
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posted 12-14-2009 04:46 AM
Thanks. If I understood your explanation, the latch must be fully retracted to pass the ring of the helmet? But I do not see this seal you talk about the NASA pictures (see the picture to top). Where is it? |
alexylenov
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posted 12-14-2009 07:13 PM
Okay, I put up some more photos that may help like this one. |
Apolloman
Member Posts: 148
From: Ledignan, Gard (30), France
Registered: Mar 2009
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posted 12-15-2009 10:15 AM
Thank you for the photo but, I have one question regarding the first photo page of your blog. You write: "In photo 1 you can see one of the latches that are located around the ring." Okay, well, I said to myself I am wrong but the pin, it is not in position "exit" or leaving it even more once the locking mechanism completely. Thank you for your answer... In fact: Apolloman = Paul Cultrera (I already write comments on your blog.) |
alexylenov
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posted 12-18-2009 02:04 PM
Okay, I see what you are talking about now. There are three positions for the latching ring: "Locked", "engage", and "open".When the ring is not locked it stays at the "engage" setting. To move to open you push it toward "open" but a spring will push it back if you let go. In the "engage" setting the latch pins are spring loaded so if you press the helmet into it they move back then snap into the grove that holds the helmet. Then you move the latch to "locked" and the latch pins are held tightly in the grove of the helmet. To remove the helmet you must move the latch to "open" so it retracts the pins all the way allowing the helmet to be removed. I hope this helps. |
Apolloman
Member Posts: 148
From: Ledignan, Gard (30), France
Registered: Mar 2009
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posted 12-19-2009 01:35 AM
Thank you very much... but this part I had understood. What I can not understand is the positioning of the pin in itself (see sketch with explanations).  Although... very briefly (I'll try), when the neck ring is opened is that the latches stand a minimum? If yes, when you press with your finger on one of the latches is that it remains fixed or is it that you can push it and when you remove your finger is that it returns to its first position? Just as this principle (you push, it goes: relaxes you, it's back)  |
alexylenov
New Member Posts:
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posted 12-19-2009 08:39 AM
Yes, that is what I was trying to explain above.In the "engage" position push it goes in, relax and it comes back out. When you move the clasp to "open" it stays in. |
Apolloman
Member Posts: 148
From: Ledignan, Gard (30), France
Registered: Mar 2009
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posted 12-19-2009 09:30 AM
No, this did not try what I said. Watch out stage 1 where the guide (dotted line) in this position because the latch? Take your neck ring and experience...Example with your finger, press them on it, that happens it? Remove your right that goes there? P.S. I'm really sorry not understand ps the first time because of the language barrier. |
Apolloman
Member Posts: 148
From: Ledignan, Gard (30), France
Registered: Mar 2009
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posted 12-23-2009 10:39 AM
Tell me if I'm wrong... but the bubble helmet does not rest on its flange (wider over his groove) the time that the 8 latchs are all locked? 
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Apolloman
Member Posts: 148
From: Ledignan, Gard (30), France
Registered: Mar 2009
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posted 12-26-2009 03:25 AM
Nobody... to confirm or refute my statements? |
Apolloman
Member Posts: 148
From: Ledignan, Gard (30), France
Registered: Mar 2009
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posted 12-30-2009 05:06 AM
This is a picture tell me if I'm wrong... |
mark plas
Member Posts: 385
From: the Netherlands
Registered: Aug 2000
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posted 01-11-2010 11:22 AM
How did they secure the LEVA during the Skylab missions?How different was this LEVA from the ones used on the Apollo flights and did it also had a centre eyeshade? |
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