# Talk:Saturn V

The text says:

For the first two uncrewed launches, eight solid-fuel ullage motors ignited for four seconds to accelerate the S-II stage, followed by the ignition of the five J-2 engines. For the first seven crewed Apollo missions only four ullage motors were used on the S-II, and they were eliminated for the final four launches.

I can't find any mention of the ullage motor being removed in the subsequent missions, in the reference given a few sentences after (https://web.archive.org/web/20150326211327/http://history.msfc.nasa.gov/saturn_apollo/documents/Second_Stage.pdf). LexisVD (talk) 12:44, 12 January 2023 (UTC)

Ullage motors are afaik reserved entirely for space, they are intended to move liquid propellant to one end of the tank so that it flows correctly. Only used in freefall. I don't know of any time it has been used on launch, it just wouldn't make any sense.User:Pedant (talk) 09:34, 24 November 2023 (UTC)
Apollo 15 was the first flight that flew with no second stage ullage engines.  The NASA Flight Evaluation report for AS-510 (Apollo 15) has this:
Four of the eight S-IC retromotors and all of the S-II ullage motors were removed for this flight; therefore, the S-IC/S-II separation sequence was revised. This sequence change extended the coast period between S-IC OECO [outboard engine cutoff] and S-II ESC [engine start command] by one second. The S-IC/S-II separation sequence and S-II engine thrust buildup performance was satisfactory.  (pg. 6-1)
Source:  https://ntrs.nasa.gov/api/citations/19730025086/downloads/19730025086.pdf Mschulm (talk) 01:46, 19 April 2025 (UTC)

As noted in Infobox: nasa.gov provides a reference to a TLI load of 52,759 kg (116,314 lb).
While that reference is no longer accessible, the data does not appear to be found in the Internet Archive archives, but is actually below.

It could launch about 118,000 kilograms (130 tons) into Earth orbit. That's about as much weight as 10 school buses. The Saturn V could launch about 43,500 kilograms (50 tons) to the moon. That's about the same as four school buses.  Yusancky (talk) 07:27, 3 August 2024 (UTC)

I have found articles that contain legit plans for Saturn V resuability. I have added these links to the First stage section, but they are from discussions on Collect Space. I have lost the article to the Brown reusability proposal but I downloaded it as a PDF before I lost the discussion. These links are not exactly the best and kind of questionable for this kind of thing, any suggestions? Spaceman20290 (talk) 15:50, 9 September 2024 (UTC)

I just backed out the changes, the sources don't seem to meet WP:RS. Also, never place raw links in the body of the text. Tarl N. (discuss) 04:19, 12 September 2024 (UTC)