Space News
space history and artifacts articles

Messages
space history discussion forums

Sightings
worldwide astronaut appearances

Resources
selected space history documents

Websites
related space history websites

  collectSPACE: Messages
  Mercury - Gemini - Apollo
  Apollo program and spacecraft: facts and figures

Post New Topic  Post A Reply
profile | register | preferences | faq | search

next newest topic | next oldest topic
Author Topic:   Apollo program and spacecraft: facts and figures
LM-12
Member

Posts: 809
From: Ontario, Canada
Registered: Oct 2010

posted 06-13-2013 12:41 AM     Click Here to See the Profile for LM-12     Edit/Delete Message   Reply w/Quote
Some facts and figures from the Apollo Command Module News Reference. More on pages 284 to 291.
The tanks that hold the super-cold fuel in the Apollo spacecraft Service Module are so well insulated that ice cubes placed inside the tanks would take eight and one-half years to melt.

The Command Module offers 73 cubic feet per man as against the 68 cubic feet per man in a compact car. By comparison, the Mercury spacecraft offered 55 cubic feet for its one traveler and Gemini provided 40 cubic feet per man.

The tanks that hold the cryogenic (ultra-cold) liquid oxygen and liquid hydrogen on the Apollo spacecraft come close to being the only leak-free vessels ever built. If an automobile tire leaked at the same rate that these tanks do, it would take the tire 32,400,000 years to go flat.

moorouge
Member

Posts: 1490
From: U.K.
Registered: Jul 2009

posted 06-13-2013 01:12 AM     Click Here to See the Profile for moorouge   Click Here to Email moorouge     Edit/Delete Message   Reply w/Quote
Conversely - coffee used to fill the tanks would supply a hot drink for some ten years.

garymilgrom
Member

Posts: 1571
From: Atlanta, GA, USA
Registered: Feb 2007

posted 06-13-2013 07:55 AM     Click Here to See the Profile for garymilgrom   Click Here to Email garymilgrom     Edit/Delete Message   Reply w/Quote
Interesting - thanks!

Ronpur
Member

Posts: 211
From: Brandon, Fl
Registered: May 2012

posted 06-13-2013 07:54 PM     Click Here to See the Profile for Ronpur   Click Here to Email Ronpur     Edit/Delete Message   Reply w/Quote
quote:
Originally posted by moorouge:
Conversely - coffee used to fill the tanks would supply a hot drink for some ten years.

And if the coffee was from Starbucks, it would probably cost more than the fuel!

moorouge
Member

Posts: 1490
From: U.K.
Registered: Jul 2009

posted 06-15-2013 01:54 AM     Click Here to See the Profile for moorouge   Click Here to Email moorouge     Edit/Delete Message   Reply w/Quote
It is recorded that the Apollo flights generally had about 5000 component failures in the millions that made up the vehicle. Such was the redundancy built in that these had little or no impact on the mission.

However, behind this fact is a remarkable feat of engineering reliability. I used to explain it in this fashion. If your car starts first time 9 times out of 10, it is 90% reliable. If both your two cars start on the first turn of the ignition switch nine times out of ten, then your two cars have a combined reliability of 81%. [9x9/10x10]. For three similar cars the reliability becomes 72%, i.e. 9x9x9/10x10x10.

The Apollo vehicle with its millions of components had an overall reliability of 99.9%.

Now that is truly amazing.

ea757grrl
Member

Posts: 555
From: South Carolina
Registered: Jul 2006

posted 06-15-2013 05:55 AM     Click Here to See the Profile for ea757grrl   Click Here to Email ea757grrl     Edit/Delete Message   Reply w/Quote
quote:
Originally posted by moorouge:
Conversely - coffee used to fill the tanks would supply a hot drink for some ten years.

Or Mission Control for about two hours.

LM-12
Member

Posts: 809
From: Ontario, Canada
Registered: Oct 2010

posted 06-15-2013 06:45 AM     Click Here to See the Profile for LM-12     Edit/Delete Message   Reply w/Quote
The ratio of propellant to payload in Saturn V is 50 to 1.
How does that compare to Mercury and Gemini?

Jim Behling
Member

Posts: 537
From: Cape Canaveral, FL
Registered: Mar 2010

posted 06-15-2013 11:28 AM     Click Here to See the Profile for Jim Behling   Click Here to Email Jim Behling     Edit/Delete Message   Reply w/Quote
quote:
Originally posted by LM-12:
How does that compare to Mercury and Gemini?
It isn't a relevant comparison for programs but launch vehicles. In addition, it isn't a relevant number either. Propellant or payload mass fraction are the common numbers and they include vehicle mass. Payload mass fractions are around 2-4%.

All times are CT (US)

next newest topic | next oldest topic

Administrative Options: Close Topic | Archive/Move | Delete Topic
Post New Topic  Post A Reply
Hop to:

Contact Us | The Source for Space History & Artifacts

Copyright 1999-2012 collectSPACE.com All rights reserved.


Ultimate Bulletin Board 5.47a





advertisement