Talk:R-4D

Source links defunct
As of today, the http://www.astronautix.com/engines/r4d.htm and https://www.rocket.com/propulsion-systems/bipropellant-rockets links in the citations are defunct.

I don't have the time to fix these ones.

Orion ESM will be using the R-4D-11
Orion ESM will be using the 490 N thrust R-4D-11, says European Service Module. - Rod57 (talk) 11:06, 13 July 2024 (UTC)