i_have_no_enemies@lemmy.world to Technology@lemmy.worldEnglish · edit-21 年前A Stunning Fusion Rocket Could Cut Interplanetary Travel in Half—and We'll Try It in Just 2 Yearswww.popularmechanics.comexternal-linkmessage-square15linkfedilinkarrow-up175arrow-down16file-textcross-posted to: space@lemmy.world
arrow-up169arrow-down1external-linkA Stunning Fusion Rocket Could Cut Interplanetary Travel in Half—and We'll Try It in Just 2 Yearswww.popularmechanics.comi_have_no_enemies@lemmy.world to Technology@lemmy.worldEnglish · edit-21 年前message-square15linkfedilinkfile-textcross-posted to: space@lemmy.world
https://web.archive.org/web/20250331084035/https://www.popularmechanics.com/space/rockets/a64256267/fusion-rocket-sunbird/
minus-squarei_have_no_enemies@lemmy.worldOPlinkfedilinkEnglisharrow-up7arrow-down1·1 年前are these calculations correct? https://www.desmos.com/calculator/4d7lq5iazh
minus-squareseven_phone@lemmy.worldBannedlinkfedilinkEnglisharrow-up22·1 年前It is pretty close to the first of April.
minus-squareJonC@programming.devlinkfedilinkEnglisharrow-up4arrow-down1·1 年前Ship gets lighter as more fuel is destroyed. Ship gets heavier as it gets closer to light speed. At 90% of light speed, the ship’s mass would be around 2.3x its rest mass. I haven’t looked at your calculations in detail, but you seem to be missing that important point!
minus-squaregandalf_der_12te@discuss.tchncs.delinkfedilinkEnglisharrow-up4·1 年前the mass increase due to relativistic effects is really really small, significantly smaller than the weight loss due to fuel consumption, which btw is described by the Rocket Equation.
are these calculations correct?
https://www.desmos.com/calculator/4d7lq5iazh
It is pretty close to the first of April.
Ship gets lighter as more fuel is destroyed. Ship gets heavier as it gets closer to light speed.
At 90% of light speed, the ship’s mass would be around 2.3x its rest mass.
I haven’t looked at your calculations in detail, but you seem to be missing that important point!
the mass increase due to relativistic effects is really really small, significantly smaller than the weight loss due to fuel consumption, which btw is described by the Rocket Equation.