I’d like to see it compared to other interplanetary electric propulsion forms, like the VASIMR or MPD thruster.

Interstellar travel is still beyond gonna be beyond our reach though for a long long time. Regardless of what engine you use, you’d need an incredible amount of energy and reaction mass to get near the speed of light, and that kind of energy we simply do not have.

]]>v = u + at

if initial velocity, u, is zero, then final velocity, v, is the product of acceleration and time.

and if acceleration = 1g, then:

v = gt

t = v/g

Assume g = 10 m/s per second

Then the time taken to accelerate to y m/s is about 1/1oth of y.

speed of light, c, = 3 x 10^8 m/s = 300,000,000 m/s

70% of this is approx 200,000,000 m/s

1/10th of this is 20,000,000 seconds

20,000,000 seconds is 230 days.

So after 8 months you’d be going 70% of the speed of light. (And your clock would run 40% more slowly than a clock on earth – after 10 years onboard, your friends on earth would have aged 14 years…)

Question for you: How fast would you be going after a further 8 months of continuous acceleration of 10m/s per second?

]]>Clue me!

]]>ionisers give of charged particles due to the high voltage.These charge particles can be further accelerated by fields.Just increase the number of needles or use a rough surface or wire wool.

]]>On p4 of the PDF linked to above, the authors discuss Isp values as high as 10,000 seconds, which equates to an exhaust velocity of almost 100km/sec. So it’ll use a lot less reaction mass than anything flying today, but it doesn’t look to me like it’s efficient enough for a starship, by a couple orders of magnitude.

(Check my math? Thanks.)

Rt

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