# Does any US rocket, historical or current, besides those using LH2 as fuel apply thermal insulation for propellant?

Besides those using LH2 in a booster and/or sustainer stage, that is.

EDIT: I should have made it clear that this applies to launch vehicles, not spacecrafts flying deep space mission.

EDIT: OK, I realized that there is the single case of Delta IV's lower stage LOX tank. And the SLS should also count too, but since it's derived from the STS ET, it got its design from reasons rather differently than most other rockets.

• Are you talking about insulation applied to the outside of the booster itself? Like the orange foam on the shuttle external tank (I know that doesn't count because it's LH2, but I am trying to understand your question.) – Organic Marble Sep 16 '19 at 1:52
• @OrganicMarble my take is that if insulation could be cited on a LOX tank, the question would be answered. Even better if some tank insulation could be cited for sub-cooled kerosene. In addition to slowing boiloff to a managable level, insulation can also slow the buildup of ice prelaunch. – uhoh Sep 16 '19 at 2:07
• @OrganicMarble Yes, that's exactly what I wanted to ask. Also the space shuttle ET's LOX tank has insulation, but for reasons other than LOX boil-off (protection of the orbiter). – Meatball Princess Sep 16 '19 at 2:23
• Cool, thanks for the clarification. – Organic Marble Sep 16 '19 at 2:52
• Long march 2/3 uses foam insulation for the lower stage to keep the tank warm. I remember in a lot of videos, the right after ignition, most of the foam tiles would be shaken off the rocket. – user3528438 Sep 16 '19 at 4:50

For an actual example, here's a diagram showing the thermal insulation around the propellant tanks of the Apollo LM descent stage, which used $$N_2O_4$$ + UDMH/MMH as propellant