Probably impossible challenges: MEGA THREAD

[M_Rat13]

I need this forums help. We need to come up with as many challenges as possible that are probably impossible.

To give you an idea of what we are up against, here's an example that backfired on me. I asked to see if anyone could make an SSTO Eve lander, that could make it from the surface, to orbit. Not only have people done that, but at least one person has also done an SSTO from the surface of Kerbin to the surface of Eve and back again.

Respect to anyone that completes any of these probably impossible challenges, and to those that weed out any challenges that aren't actually probably impossible.

With that out the way, let the challenges, commence.

[Aeroboi]

Build a stock elevator as long as the Mohole and get it into the Mohole.

[vyznev]

I assume the challenges shouldn't be definitely impossible, like landing on the Sun or flying to Jool using only jet engines?

Here's one I'm pretty sure is impossible: make a 4 part crewed SSTO using only liquid fuel (no oxidizer). I've done it with 5 parts, and 4 is not definitely impossible, since there are inline air intakes that also carry fuel. Just not quite enough of it, as far as I can tell.

[Johnster_Space_Program]

With OPM going to Plock and using just 3 parts no refueling

[M_Rat13]

6 hours ago, vyznev said:

I assume the challenges shouldn't be definitely impossible, like landing on the Sun or flying to Jool using only jet engines?

Here's one I'm pretty sure is impossible: make a 4 part crewed SSTO using only liquid fuel (no oxidizer). I've done it with 5 parts, and 4 is not definitely impossible, since there are inline air intakes that also carry fuel. Just not quite enough of it, as far as I can tell.

Exactly. Theoretically possible, but maybe not practically.