- #26

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At 10% c, relativistic effects only amount to a 2% difference in elapsed Earth time and elapsed ship time. (You just shave 2 1/2 months off for every 10 lys traveled.)

it's even worse than that..

at 14% c you have only a 1% time dilation (99,49874371% true time)

here is my handy Geometrodynamics Table as a reference

which includes the Formula for calculating time dilation

at 10% c there is only a 0,5% time dilation (half of 1%) so you only save 433 seconds per day of travel (more accurately - 0,50125629% time dilation)

so 1 day would equal 85966,91 seconds rather than 86400 s

a relative calendar year would equal 31398770,7931 seconds

rather than 31556952 seconds - (158181,2069 seconds less)

one would save: 1 day - 19 hours - 56 minutes - 0,35 seconds per year of travel

so in relativistic terms 10% c is not much faster than a school bus

to make matters even worse - the Bussard Fusion Ramjet must accelerate to 6% c - using conventional impulse propulsion before the Ramjet can even be engaged

a spacecraft with humans onboard can only accelerate at 1g for long durations - and accelerating at 1g (9,80665 m/s/s) would require 21 days 5 hours 30 min to reach 6% c - and 35 days 9 hours to reach 10% c

a 40 TW Fusion Ramjet would be lucky to acheive 50% efficiency

so it's doubtful that even 10% c would be reached using this method of propulsion

(the maximum period of time a spaceship can accelerate at 1 g is 30570322 seconds - or 353 days 19 hours 45 minutes 22 seconds - at 30570323 seconds the spaceship would reach c - which is impossible according to The Special Theory

the only proposed propulsion system capable of velocites approaching c

is warp drive - which expands the space behind the spaceship whilst compressing the space in the direction of travel

incidentally this is the propulsion system used in the Star Trek series

using this method of propusion - theoretically - it would be possible to acheive the effect of FTL velocity without actually reaching c

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