Timeline for Perpetual motion machines and rocketry
Current License: CC BY-SA 4.0
4 events
| when toggle format | what | by | license | comment | |
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| May 25, 2021 at 2:03 | comment | added | TLW | @BMF the fundamental issue here is power = torque * rotation rate = force * radius * rotation rate... and radius and rotation rate are both fixed and both fairly small. Ultimately the power is transmitted through the surface of a, say 4-inch sphere, and hence is limited by, among other things, the shear stress of the surface of said sphere. Which because radius and rotation rate are limited limits your overall power output. You'd do much better if it was e.g. 2 4-foot bars rotating against each other (counter-rotating-propellor-like). | |
| May 25, 2021 at 1:56 | comment | added | TLW | @BMF - multiple spinners stacked would help. It would require a fair few spinners though (each one "adds" 60RPM to the final output). Also I'm pretty sure I'm off by a factor of pi (or 2pi?) on at least some of these numbers. | |
| May 24, 2021 at 21:35 | comment | added | BMF | Is it possible to reduce the amount of torque at the attachment point by some clever arrangement of mechanics? Could using multiple spinners and multiple attachments for the same high-rpm output (by some clever arrangement) mitigate the issue? | |
| May 24, 2021 at 19:41 | history | answered | TLW | CC BY-SA 4.0 |