NASA What did Apollo CM use helium for?

[saddlestone-man]

TL;DR

Why were there tanks of helium on the CM?

Hello All

Diagrams of the Apollo Command Module show tanks of helium, What was this used for?

best regards ... Stef

 

[hutchphd]

I think it was used to feed propellent for attitude control and perhaps the big engine. Were these in the Service module or the command module?

 

[anorlunda]

https://en.wikipedia.org/wiki/Apollo_command_and_service_module
helium tanks for the CM reaction control subsystem

 

[hutchphd]

Of course you would still need attitude control thrusters for re-entry (after ejecting the Service module). Duh I didn't even think it through.