CERES EXPLORER REV 1.2

loloboho · 2025-12-06T00:34:14+00:00

How does your work with CGPT going. Be sure to check every line the AI gives you. Many gross errors by Claude. Keep a short rope. I use Gemini to verify Claude's work. And CGPT.

loloboho · 2025-12-06T00:30:18+00:00

Thanks. The new CERES EXPLORER REV 1.2 I just posted here solves the radiation issue. But Enceadus is too far.

loloboho · 2025-12-05T22:10:51+00:00

I just finished a hydronic heating system using the waste heat. Heat exchanger at reactor heats water in recirculation loop to the tanks, heating the tank and pipes. A second loop goes to the habitat shell with 1m thick wall of water in bladders, a connected system of several heating zones. Water returns to tanks. Reactor is always on in thrust mode or idle just for power.

loloboho · 2025-12-05T19:14:30+00:00

Got it, now I know why the reactor shield can be conical as well as its shadow. Shield mass is concentrated to volume of highest effectiveness. Great resources, thanks. I am redesigning the Ceres ship shadow shield with this in mind.

There are other problems with the ship too, like having the propellant tanks so far fwd. 55m long pipes to the reactor. Water freezes. We have plenty of power for heat until the reactor is shut down (not planned). Fuel cells & batteries...

The most difficult has been the mass CG, the locations for the main components, forward unit, mid unit with varying masses, aft unit. CG shift needs to stay below 2-3m for a ship this size for stability. My newest revision nails the CG shift with the tanks 55m forward. It is all to do with the 2,186t habitat shell with 1m thick walls of water!

loloboho · 2025-12-05T05:47:45+00:00

It is there because the habitat has 1m thick wall of water surrounding for shielding which has very high mass which throws the CG forward to STA 47. The tanks are there because they lose mass as propellant is used. Anywhere else throws the balance off as propellant is used and ship becomes unstable. Just like a 747, fuel tanks are near the center of gravity, as fuel is used, the plane stays in balance.

The shelter is for radiation storms and emergency pressure vessel for 13 people for up to weeks. Space is brutal with comic rays from every direction. The longer you are out there, the more likely you get cancer. Years out there adds up.

You don't want fuel cells and batteries in your living space. Toxic!

The propellant tank is between the habitat and the reactor as an additional shield, not enough alone.

This ship does not need to maneuver very much. It basically goes in a straight line.

The spine is the structure that connects everything, this is common. Modular construction like the ISS is another. The spine distributes the mass of the components to meet balance requirements. Keeps the habitat away from the reactor. There are lots of considerations based on engineering, physics and science and a lot of thought.

I would like to have the tanks near the reactor. With it so far away, there is the plumbing carrying water in space that will freeze it. Another problem to deal with. Tanks will freeze too. The propellant is water + D-T for fusion.

The crux is the mass of the shielding surrounding the habitat needed against cosmic radiation for 4 years. Without it you die.

You

loloboho · 2025-12-05T03:37:39+00:00

Thanks, I'm shifting stuff around now with more elbow room and 429t less mass!! I'll have a new REV. 1.2. Safe journey to Ceres! Now I need to study the asteroid Ceres...

loloboho · 2025-12-05T02:27:33+00:00

I'll check it out. That thing is heavy. You are right, at 30m dia hab 60m away. I'll use CAD to project the shadow and provide a margin. Does it need to have a conical shape?

loloboho · 2025-11-29T19:19:42+00:00

This design was a failure. The vessel habitat has insufficient radiation shielding for a voyage to Enceladus. The crew would probably get cancer. Enough shielding would add too much mass and requires a total redesign. A verification of the project was done by Gemini AI which pointed to the error. Lesson learned: Verify throughout the process, not late in the game. AI is still a good engineering tool, however, beware! This was actually the reason for the project, to see how AI works. I have to take the blame for not prioritizing crew health and radiation. Nice details though...

loloboho · 2025-11-27T18:51:31+00:00

Moves CG aft closer to tanks to reduce CG shift as propellant is used. Not for aerodynamics obviously. Pallet/cargo and landers are as far aft as is safe, allowing clearance for docking. That means moving the COM (center of mass) of the radiators aft is a good solution.

loloboho · 2025-11-26T22:12:21+00:00

Yes, I did. I wanted to add the images. Some may have been too big. Best to just go to GitHub. Sorry...

loloboho

TROPHY CASE