Editing Apollo 15 (section)

=== Spacecraft ===
[[File:Apollo 15 SIM bay.jpg|thumb|upright|left|alt=Area of spacecraft with lunar sensors|Apollo 15 SM SIM bay]]
Apollo 15 used command and service module CSM-112, which was given the [[call sign]] ''Endeavour'', named after [[HMS Endeavour|HMS ''Endeavour'']], and Lunar Module LM-10, call sign ''Falcon'', named after the [[United States Air Force Academy]] mascot. Scott explained the choice of the name ''Endeavour'' on the grounds that its captain, [[James Cook]], had commanded the first purely scientific sea voyage, and Apollo 15 was the first lunar landing mission on which there was a heavy emphasis on science.{{sfn|Lindsay|pp=301–302}} Apollo 15 took with it a small piece of wood from Cook's ship,<ref>{{cite news|last=Scurr|first=Ruth|title='Endeavour' by Peter Moore review – the ship that changed the world|date=August 25, 2018|access-date=January 5, 2019|url=https://www.theguardian.com/books/2018/aug/25/endeavour-ship-captain-cook-peter-moore|newspaper=[[The Guardian]]|archive-url=https://web.archive.org/web/20190106010649/https://www.theguardian.com/books/2018/aug/25/endeavour-ship-captain-cook-peter-moore|archive-date=January 6, 2019|url-status=live|df=mdy-all}}</ref> while ''Falcon'' carried two falcon feathers to the Moon{{sfn|Irwin|p=85}} in recognition of the crew's service in the Air Force.<ref group=ALSJ name=hammer /> Also part of the spacecraft were a [[Launch Escape System]] and a Spacecraft-Lunar Module Adapter, numbered SLA-19.<ref name = "hardware">{{cite web|title=Apollo/Skylab ASTP and Shuttle Orbiter Major End Items|date=March 1978|url=https://s3.documentcloud.org/documents/6473665/Apollo-Skylab-ASTP-and-Shuttle-Orbiter-Major-End.pdf |archive-url=https://ghostarchive.org/archive/20221009/https://s3.documentcloud.org/documents/6473665/Apollo-Skylab-ASTP-and-Shuttle-Orbiter-Major-End.pdf |archive-date=2022-10-09 |url-status=live|publisher=[[NASA]]|page=6}}</ref>

Technicians at the [[Kennedy Space Center]] had some problems with the instruments in the service module's scientific instrument module ([[scientific instrument module|SIM]]) bay. Some instruments were late in arriving, and principal investigators or representatives of NASA contractors sought further testing or to make small changes. Mechanical problems came from the fact the instruments were designed to operate in space, but had to be tested on the surface of the Earth. As such, things like the 7.5&nbsp;m (24&nbsp;ft) booms for the [[Mass spectrometry|mass]] and [[gamma ray spectrometer]]s could be tested only using equipment that tried to mimic the space environment,<ref>{{cite book |last=Compton |first=William D. |url=https://history.nasa.gov/SP-4214/contents.html |title=Where No Man Has Gone Before: A History of Apollo Lunar Exploration Missions |year=1989 |chapter=The Lunar Rover and New Experiments|chapter-url=https://www.hq.nasa.gov/office/pao/History/SP-4214/ch13-3.html|id=SP-4214|publisher=U.S. Government Printing Office |location=Washington, D.C. |oclc=1045558568}}</ref> and, in space, the mass spectrometer boom several times did not fully retract.{{sfn|Mission Report|p=171}}<ref name = "moon mountain">{{cite book |last=Compton |first=William D. |url=https://history.nasa.gov/SP-4214/contents.html |title=Where No Man Has Gone Before: A History of Apollo Lunar Exploration Missions |year=1989 |chapter=To The Mountains of the Moon|chapter-url=https://www.hq.nasa.gov/office/pao/History/SP-4214/ch13-4.html|id=SP-4214|publisher=U.S. Government Printing Office |location=Washington, D.C. |oclc=1045558568}}</ref>

On the Lunar Module, the [[fuel]] and [[oxidizer]] tanks were enlarged on both the descent and ascent stages, and the [[Rocket engine nozzle|engine bell]] on the descent stage was extended. Batteries and [[solar cell]]s were added for increased electrical power. In all this increased the weight of the Lunar Module to {{convert|36000|lb|kg|abbr=off}}, {{convert|4000|lb|kg}} heavier than previous models.<ref name=presskit />

If Apollo 15 had flown as an H mission, it would have been with CSM-111 and LM-9. That CSM was used by the [[Apollo–Soyuz Test Project]] in 1975,<ref group=ALSJ name=postseva>{{cite web |title=Stand-Up EVA |url=https://www.hq.nasa.gov/alsj/a15/a15.postseva.html |year=1996 |editor-last=Jones |editor-first=Eric M. |work=Apollo 15 Lunar Surface Journal |publisher=NASA |access-date=September 9, 2018 |archive-url=https://web.archive.org/web/20161012014119/http://www.hq.nasa.gov/alsj/a15/a15.postseva.html |archive-date=October 12, 2016 |url-status=live |df=mdy-all }}</ref> but the lunar module went unused and is now at the [[Kennedy Space Center Visitor Complex]].<ref>{{cite web|title=Location of Apollo Lunar Modules|publisher=Smithsonian Air and Space Museum|url=https://airandspace.si.edu/explore-and-learn/topics/apollo/apollo-program/spacecraft/location/lm.cfm|access-date=September 9, 2018|archive-url=https://web.archive.org/web/20180909222118/https://airandspace.si.edu/explore-and-learn/topics/apollo/apollo-program/spacecraft/location/lm.cfm|archive-date=September 9, 2018|url-status=live|df=mdy-all}}</ref> ''Endeavour'' is on display at the [[National Museum of the United States Air Force]] at [[Wright-Patterson Air Force Base]] in [[Dayton, Ohio]],<ref>{{cite web|title=Apollo 15 Command Module|publisher=[[National Museum of the United States Air Force]]|url=https://www.nationalmuseum.af.mil/Visit/Museum-Exhibits/Fact-Sheets/Display/Article/197685/apollo-15-command-module/|date=April 4, 2016|access-date=December 23, 2018|archive-url=https://web.archive.org/web/20180828134559/https://www.nationalmuseum.af.mil/Visit/Museum-Exhibits/Fact-Sheets/Display/Article/197685/apollo-15-command-module/|archive-date=August 28, 2018|url-status=live|df=mdy-all}}</ref><ref>{{cite web|url=https://airandspace.si.edu/explore-and-learn/topics/apollo/apollo-program/spacecraft/location/cm.cfm|title=Location of Apollo Command Modules|publisher=Smithsonian National Air and Space Museum|access-date=August 27, 2019|archive-date=June 1, 2021|archive-url=https://web.archive.org/web/20210601052353/https://airandspace.si.edu/explore-and-learn/topics/apollo/apollo-program/spacecraft/location/cm.cfm|url-status=dead}}</ref> following its transfer of ownership from NASA to the [[Smithsonian]] in December 1974.<ref name = "hardware" />