maurvir wrote: ↑Fri Apr 29, 2022 3:51 pm
you have to find a clean way to transition from microgravity to partial gravity.
Um, you do realize that any visiting astronauts will be doing THAT when docking their spacecraft to this space station, yes?
Let's look again at that drawing from Orbital Assembly Corp (OAC):
I have no idea what the OAC illustrator was thinking about with that sort of a mini-shuttle near the bottom center, especially considering that somehow it is being docked via what has been the engines in most shuttle designs, plus it is very small, so let's ignore that.
Instead consider the more conventional capsule in the lower right corner. Maybe that OAC illustrator had no idea what they were drawing, but let us assume the dimensions for the next generation Orion capsule. Unlike the capsule above (which has a height-to-width ratio closer to those of the Gemini capsules), Orion will be about 3 meters tall and 5 meters wide. Let's use that 5 meters to guesstimate the other dimensions for the OAC Pioneer space station.
The presumed four living pods appear to be about 10 meters in width and about 25 meters in length. A guesstimate for the ring forming Pioneer appears to be about twice that length, so call the general radius of Pioneer 50 meters.
This page allows one to enter 2 of the values in order to determine the other two values. So, let R=50 meters and A=0.1666 G (the Moon's gravity), then the angular velocity is about 1.72 rotations per minute and a tangential velocity of a bit over 9 meters per second.
So the approaching spacecraft must hit a target which will be traveling relative to the "motionless" center of Pioneer at about 32 km per hour or about 20 miles per hour.
At least the design of Pioneer appears to be such that if an approaching spacecraft misses, then that craft will not tear into the side of one of the living pods. On the other hand there must be a ladders that are extendable from the docking bays for any of the astronauts to get in. Moving any cargo from the spacecraft becomes much more of a problem than doing the same on the ISS.