lamontagne: dumbbell fleet and 2019 station catalogue

Design summary

• Dumbbell fleet. Many dumbbell stations (2 Starship launches each), some rotating and some not, linked by MMSEV taxis. The hub connector sits at the centre of rotation.
• Solar arrays and radiators swap between sun and shade; rigid 8 m Starship modules.
• A Canadarm-like balancing-mass arm with a glycol tank aligns the CoM lamontagne, 2019-03-12; lamontagne, 2019-03-16; lamontagne, 2019-03-23.
• Many dumbbells "like a wind farm" lamontagne, 2019-03-31.
• Catalogue (2019) lamontagne, 2019-03-27; lamontagne, 2019-03-25:
• A Starship-launched habitat of ~300 m³ on three 40 m² floors, 20–30 t bare; MMSEV taxi (5–6 t).
• Configurations from one non-rotating module to a 4-module rotating station, including unstable and stable barbells.
• Mars g at 46 m radius (module centre) and 3.1 rpm.
• Spreadsheets: "Modular Space Station.xlsx", "Vessel design (4).xlsx" lamontagne, 2019-03-28.
• Habitats fully covered by solar panels and radiators, plus MLI lamontagne, 2019-03-31.
• Dragon dumbbell. Two Dragon 2s nose-to-nose on an extended connection module lamontagne, 2019-04-12. Repurposed MPLM modules on an expandable boom lamontagne, 2019-04-11.
• Docking fix: dock on the axis, then roll the dumbbell + shuttle 90° into the rotation plane lamontagne, 2019-03-25.

Critiques raised

• Paul451: a capsule docked on the dumbbell's axis is unstable Paul451, 2019-03-23.
• The intermediate-axis debate: fix it with X or Y shapes Aussie_Space_Nut, 2019-03-23; Coastal Ron, 2019-03-23.
• Coastal Ron: Dragon needs its trunk, has no toilet, and has only 9.3 m³ Coastal Ron, 2019-04-13.

Open questions

• Are many small linked dumbbells more economic than one larger station?

Related pages

• Dumbbell/barbell · Stability · Docking

Sources

Forum posts

• lamontagne, 2019-03-12 (reply #1347, 2 likes): Dumbbell fleet. Post. Attachments: Dumbell station.jpg, Dumbell stationb.jpg.
• lamontagne, 2019-03-16 (reply #1351, 2 likes): Detail. Post. Attachments: Dumbell station_Scene 1.jpg.
• lamontagne, 2019-03-23 (reply #1357, 3 likes): Balancing arm. Post. Attachments: Dumbell station_Scene 2.jpg, Dumbell station_Scene 2b.jpg.
• Paul451, 2019-03-23 (reply #1358): Docked capsule unstable. Post.
• Aussie_Space_Nut, 2019-03-23 (reply #1360): Intermediate axis. Post. Attachments: 2100-Tapered-Tube-Assy2.jpg.
• Coastal Ron, 2019-03-23 (reply #1370, 3 likes): X/Y fix. Post.
• lamontagne, 2019-03-25 (reply #1392, 2 likes): Controlled roll. Post.
• lamontagne, 2019-03-25 (reply #1396): Habitat spec. Post. Attachments: Dumbell in Starship.jpg, Dumbell station floors.jpg, 1-s2.0-S0094576598000022-gr1.gif, STS-114_Raffaello_module.jpg.
• lamontagne, 2019-03-27 (reply #1406, 4 likes): Catalogue (4 likes). Post. Attachments: catalog.jpg.
• lamontagne, 2019-03-28 (reply #1414, 2 likes): Spreadsheets. Post. Attachments: Modular Space Station.xlsx, Vessel design (4).xlsx, Dumbell station x-ray.jpg.
• lamontagne, 2019-03-31 (reply #1447, 3 likes): Like a wind farm. Post. Attachments: Dumbell station many_Scene 5.jpg.
• lamontagne, 2019-03-31 (reply #1462): Covered in panels. Post.
• lamontagne, 2019-04-11 (reply #1538): MPLM on boom. Post.
• lamontagne, 2019-04-12 (reply #1540, 1 like): Dragon dumbbell. Post.
• Coastal Ron, 2019-04-13 (reply #1543): Dragon limits. Post.