File talk:Vestibule Wall - Bolt.jpg

Background

Critical geometric features and dimensions are taken from SSP 41004J “CBM to Pressurized Element ICD”, several NASA Execute Packages, technical papers found in the NTRS, and many on-orbit photographs stored in the National Archives. Ancillary features and details have been simplified or omitted for clarity. Drawing is not to a scale of uniform precision.

References used to create the figure (notes and citations are below):

1. SSP-41004J “Common Berthing Mechanism to Pressurized Elements Interface Control Document Part 2”, National Aeronautics and Space Administration/Johnson Space Center, Houston, Texas (October 25, 2005). The ICD is authoritatively called by the spec as being applicable in its entirety. Referred to below as “the ICD”.
2. T683-13850-3, “Common Berthing Mechanism Assembly Qualification Test Report”, Boeing Defense and Space Group, Missiles and Space Division, Huntsville, AL (October 8, 1998). Referred to in the notes as “the AQT”.
3. NSTS photographs of assembly and on-orbit operations in the National Archives (e.g., //catalog.archives.gov/search?q=common%20berthing%20mechanism&f.materialsType=photographsandgraphics). All NSTS photographs are now in the archives, including many previously published on neither the NASA website nor on the new Flikr feed. Where some specific photograph is referred to, a NASA photograph designator is used.
4. ISS photographs of assembly and other on-orbit operations in the NASA collections (https://www.flickr.com/photos/nasa2explore/). Where some specific photograph is referred to, a NASA photograph designator is used. Few, if any, of the ISS Expedition photographs are yet available in the national archives. Only a small fraction appear to have been published as yet on the Flikr feed.
5. The Kennedy Space Center media archives (//mediaarchive.ksc.nasa.gov/#/Home/), referred to below as “KSC”.
6. Sievers, Daniel E. and Harry K. Warden, “International Space Station Powered Bolt Nut Anomaly and Failure Analysis Summary”, (NTRS #20100021933), referred to below as “Sievers”.
7. JSC-48503, “International Space Station ISS/Shttle Joint Operations Book”, National Aeronautics and Space Administration/Johnson Space Center Mission Operations Directorate, Operations Division (28 JUN 05), referred to in the notes as “Joint Ops”. See //www.nasa.gov/centers/johnson/pdf/123838main_iss_shuttle_joint_ops_book.pdf.
8. McLaughlin, Richard J. and William H. Warr, “The Common Berthing Mechanism (CBM) for International Space Station”, SAE (2001), referred to in the notes as “McLaughlin”.
9. NASA/CR-2010-216890 “The Mechanical Performance of Subscale Candidate Elastomer Docking Seals” (NTRS record #20100039390), referred to as “MPS” below.
10. NASA/TM—2012-217722 “A Comparison of Candidate Seal Designs for Future Docking Systems”, (NTRS record #20120015496), referred to as “CCSC”, below.
11. Underwood, Steve and Oleg Lvovsky, “Implementation of Leak Test Methods for the Internation (sic) Space Station (ISS) Elements, Systems and Components” (NTRS #20070022572), referred to below as “Underwood”.

Notes:

1. The diameter of the Powered Bolt circle was taken from ICD Figure 3.1.4.1-21.
2. ) Identification and internal component arrangement of the nut and bolt assemblies were scaled from Figure 1 of Sievers.
3. The shape of the bolt actuator was as shown in Figure 6 of McLaughlin given the enveloping dimensions of ICD Figures 3.1.4.1-9 and -10. Good views of the backside of the bolt assembly without an actuator are found in KSC photo 2010-3453.jpg. On-orbit views of installed components are found in 255-STS-STS106-372-019.jpg and 255-STS-STS101-387-016.jpg (see the National Archives reference, above).
4. The enveloping dimensions of the nut were established by ICD Figure 3.1.4.1-22, generally confirmed by reference to 255-STS-STS097-330-011.jpg, 255-STS-STS106-372-019.jpg, and 255-STS-STS101-387-016.jpg (see the National Archives reference, above).
5. Characteristics of the cbm/cbm seal cross-section were based on Figure 2 of the MPS, Figure 4 of the CCSD and Figure 5 of Underwood, but using the bead configuration shown in Figure 2 (sic) on page 185 of the Joint Ops.
6. Gross dimensions and profiles of the thermal standoff and strike plate were taken from ICD Figure 3.3.10-3 and -6 and, respectively. The internal cross-section of the standoff is an interpretation based on Foster(2004). Depiction as a helical spring is intended to convey Foster’s choice of words: the forces might be produced by an elastomer.

Not fred999 (talk) 19:01, 29 February 2020 (UTC)