On Sat, Dec 23, 2017 at 6:24 AM, Rob O'Connor <xxxxxx@ozemail.com.au> wrote:

A round-trip to 100 diameters and back at 1G continuous acceleration requires 13.44 G-hours or a delta-v of about 482 km/sec.

Fusion drive delta-v: [snip] = 1530 km/sec

Which is a bit over 3x that needed for a 1G round trip.

So the PCs will need to refuel at least every other round trip, to be safe.

The antimatter rocket:
delta-v = 0.58 x c x 0.051
= 8864 km/sec

This is almost double the needed delta-v for 4 round trips at 6G acceleration (~4562 km/sec)

So military vessels use antimatter afterburners as a matter of course.

Now all I need to figure out is how much volume 5% of mass represents as water (because I use a variant of the LBB ship construction system) . . .

Hmmm.

I think I'll go with 10% of volume, just to be sure.

Thanks!

Richard Aiken

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