Thanks! That would certainly be useful, if you can find it!

On Mon, Dec 25, 2017 at 3:18 PM, Rusty Witherspoon <xxxxxx@gmail.com> wrote:

I remember that the GURPS 4e Spaceships series (or maybe it was a pyramid article?) Included the math for converting real life engines into the game stats. Now, I mention this because everything was done in units equal to 5% ship mass, including engines and fuel. I might be able to drag up a copy, but I'm on my tablet and a few hundred miles from my computer.
But, it might be useful if you want to tweak the drive numbers.



On December 25, 2017, at 6:29 AM, Richard Aiken <xxxxxx@gmail.com> wrote:


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

"Never insult anyone by accident."  Robert A. Heinlein
"I studied the Koran a great deal. I came away from that study with the conviction there have been few religions in the world as deadly to men as Muhammed." Alexis de Tocqueville
"We know a little about a lot of things; just enough to make us dangerous." Dean Winchester (fictional monster hunter portrayed by Jensen Ackles)
"It has been my experience that a gun doesn't care who pulls its trigger." Newton Knight (as portrayed by Matthew McConaughey), to a scoffing Confederate tax collector facing the weapons held by Knight's young children and wife.
-----

The Traveller Mailing List

Archives at http://archives.simplelists.com/tml

Report problems to xxxxxx@simplelists.com

To unsubscribe from this list please go to 

http://archives.simplelists.com
-----
The Traveller Mailing List
Archives at http://archives.simplelists.com/tml
Report problems to xxxxxx@simplelists.com
To unsubscribe from this list please go to 
http://www.simplelists.com/confirm.php?u=CKGWeUlXNVzOv9Ey6KwqX8aXjeTXlVSV



--
Richard Aiken

"Never insult anyone by accident."  Robert A. Heinlein
"I studied the Koran a great deal. I came away from that study with the conviction there have been few religions in the world as deadly to men as Muhammed." Alexis de Tocqueville
"We know a little about a lot of things; just enough to make us dangerous." Dean Winchester (fictional monster hunter portrayed by Jensen Ackles)
"It has been my experience that a gun doesn't care who pulls its trigger." Newton Knight (as portrayed by Matthew McConaughey), to a scoffing Confederate tax collector facing the weapons held by Knight's young children and wife.