Reminds me of the drives in Iain Banks' Culture novels, which are FTL but have similar speed limits based on a preferred rest frame. He never describes them in great detail, which is probably a good thing. :) But it can result in e.g. a ship going too fast to be able to engage its maneuver drive successfully, which has some interesting plot seed possibilities...

On Sat, Jul 18, 2015 at 5:41 PM, Rob O'Connor <xxxxxx@ozemail.com.au> wrote:
Rupert Boleyn wrote:
> Time dereases proportional to the square root of acceleration, so if
> Jupiter is 6 days out at 1G, it's ~2.5 days out at 6Gs.

Yep, my mistake.

> I just handwaved them as limited to 5% fo lightspeed.

5% of c = 15,000km/s or about 420 G-hours using all thrust to accelerate.

> For normal operations in Traveller it only affects 5G and 6G drives,
> as they can hit the cap inside 3.5 days and thus it reduces the
> distance at which an in-system jump is faster than a 5 or 6G ship.

A reasonable compromise which folds increased capability/efficiency with Tech Level.

Doesn't get around the power problem, though.
All those terajoules of KE per kg vehicle mass have to accumulate somehow.


Craig Berry wrote:
> 5% of c relative to what? :)

Rupert's idea of the cosmic microwave background serving as a reference is a good one.

Local star as the preferred frame makes sense for in-system travel but has consequences for relativity, as you point out.


Rob O'Connor
sorry about the threading; trying to solve the problem
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