So today I decided to put an airship over another planet in KSP. I initially thought about Laythe, but eventually decided to send a probe to Eve because, well.. it’s (a) easier, and (b) I wanted to see if it would make returning easier.
As it happens, I landed it, and then took off and reached 25km (approx) before running out of lift from the air-bag. This was with the smallest one, so maybe a larger airship might go higher. Something to attempt in the future.
Anyway, it was fun, and I left the probe floating in the sea (no landing gear). The propulsion was manoeuvring thrusters, which in Eve’s atmosphere turned out to be sub-optimal, but one lives and learns.