Why repeat the experiment?
Sending up a steam-driven rocket to check whether the Earth is flat? This was already tried many decades ago and described by the BBC in the report "Wings Over Dagenham" first broadcast on 10 January 1957.
Flat Earth Society member: Er, could you slow down just a bit here, I want to take that photograph of the Earth.
Eccles: Oh here. I just saw the Earth through the clouds.
Flat Earth Society member: Did it look round?
Eccles: Yeah, but I don't think it saw me.