4 ms·

I would be concerned with sudden high intensity jerks, and with handling rotational acceleration (causing shear stress between different solid/liquid structures

I would be concerned with sudden high intensity jerks, and with handling rotational acceleration (causing shear stress between different solid/liquid structures). Chiefly with the inertia and buoyancy of the brain and possible concussion/impact/torsion against the skull and spinal cord caused by those jerks.

samplatt 2y ago
Armchair speculation from an avid scifi reader... I wouldn't be surprised if at 30 g's we start to see mass destruction of capillaries as blood pools in loops and kinks and then bursts. Which is extra bad when some of those are inside your brain.
- nick3443 2y ago
  Colonel Stapp did short duration 46g in 1954 and survived.
  - hermitcrab 2y ago
    Is that the time on the rocket sled when his eyeballs filled with blood? Nasty. He was very brave/totally crazy.
shagie 2y ago
I am curious what a earth to space launch rotovator that is capable of doing 30g would have for its overall acceleration profile. Robert Forward (the author of Timemaster) was a physicist and I would do a check of his anatomy related topics before getting into one... but I would be confident of his math. He wasn't unfamiliar with the technology being used. https://en.wikipedia.org/wiki/Robert_L._Forward https://en.wikipedia.org/wiki/Robert_L._Forward > He then went to work at the research labs of Hughes Aircraft, where he continued his research on gravity measurement and received 18 patents. He took early retirement in 1987, to focus on his fiction writing and consulting for such clients as NASA and the U.S. Air Force. In 1994, he co-founded the company Tethers Unlimited, Inc. with Robert P. Hoyt, where he served as chief scientist and chairman until 2002. https://en.wikipedia.org/wiki/Tethers_Unlimited,_Inc https://en.wikipedia.org/wiki/Tethers_Unlimited,_Inc. > Founded in 1994 by Robert P. Hoyt and Robert L. Forward, Tethers Unlimited began developing products based on space tether technologies, including concepts for removal of space debris and momentum exchange tethers for launching payloads into higher orbits. TUI has since broadened its suite of technologies to include power, propulsion, actuation, and communications systems for small satellites, robotic technologies for on-orbit fabrication and assembly, optical fiber winding and deployment, software defined radio communications, and 3D printed radiation shielding. ... And so, on his word, I'd suspect that it would not be unreasonable to do a fluid breathing 30g ... given the right fluid breathing setup. The rotovator setups are looking at significant fractions of a day for earth capture to space release (6 or 12 hours). I don't think there would be human significant jerk, snap, crackle, and pops either. Though again, I'd be curious to see that acceleration profile (not that I'd ever be doing it myself).

samplatt 2y ago

Armchair speculation from an avid scifi reader... I wouldn't be surprised if at 30 g's we start to see mass destruction of capillaries as blood pools in loops and kinks and then bursts. Which is extra bad when some of those are inside your brain.

nick3443 2y ago
Colonel Stapp did short duration 46g in 1954 and survived.
- hermitcrab 2y ago
  Is that the time on the rocket sled when his eyeballs filled with blood? Nasty. He was very brave/totally crazy.

shagie 2y ago

I am curious what a earth to space launch rotovator that is capable of doing 30g would have for its overall acceleration profile. Robert Forward (the author of Timemaster) was a physicist and I would do a check of his anatomy related topics before getting into one... but I would be confident of his math. He wasn't unfamiliar with the technology being used. https://en.wikipedia.org/wiki/Robert_L._Forward https://en.wikipedia.org/wiki/Robert_L._Forward > He then went to work at the research labs of Hughes Aircraft, where he continued his research on gravity measurement and received 18 patents. He took early retirement in 1987, to focus on his fiction writing and consulting for such clients as NASA and the U.S. Air Force. In 1994, he co-founded the company Tethers Unlimited, Inc. with Robert P. Hoyt, where he served as chief scientist and chairman until 2002. https://en.wikipedia.org/wiki/Tethers_Unlimited,_Inc https://en.wikipedia.org/wiki/Tethers_Unlimited,_Inc. > Founded in 1994 by Robert P. Hoyt and Robert L. Forward, Tethers Unlimited began developing products based on space tether technologies, including concepts for removal of space debris and momentum exchange tethers for launching payloads into higher orbits. TUI has since broadened its suite of technologies to include power, propulsion, actuation, and communications systems for small satellites, robotic technologies for on-orbit fabrication and assembly, optical fiber winding and deployment, software defined radio communications, and 3D printed radiation shielding. ... And so, on his word, I'd suspect that it would not be unreasonable to do a fluid breathing 30g ... given the right fluid breathing setup. The rotovator setups are looking at significant fractions of a day for earth capture to space release (6 or 12 hours). I don't think there would be human significant jerk, snap, crackle, and pops either. Though again, I'd be curious to see that acceleration profile (not that I'd ever be doing it myself).