Steve Jackson Games Forums - View Single Post

chandley · 07-30-2011, 09:51 AM

If you happen to have Gurps Vehicles, p.26 of that book has a very familiar looking table. You can work backwards from that, submerged weight, and your own judgement on how good your ships hydrodynamic lines are to get a surface water speed and a submerged speed.

I didnt concern myself with my ram-rockets differing performance in the much denser water than air, since I had already made it a reconfigurable system (to switch between high and low thrust options) and figured the cost and tech needed to adjust nozzles for space, air, and water all fell under that. Given how much a reconfigurable system costs, using that to cover your ability to get full rocket thrust underwater should do, Id think.

I do wonder if we could figure out a vortex system to get underwater speed up. It seems to be a TL 9 design feature if the real world is any indication, and spaceships like the Vorpal Blade feature it prominently. But I digress.

07-30-2011, 09:51 AM	#5
chandley Join Date: Aug 2004	Re: Water Move for Spaceships If you happen to have Gurps Vehicles, p.26 of that book has a very familiar looking table. You can work backwards from that, submerged weight, and your own judgement on how good your ships hydrodynamic lines are to get a surface water speed and a submerged speed. I didnt concern myself with my ram-rockets differing performance in the much denser water than air, since I had already made it a reconfigurable system (to switch between high and low thrust options) and figured the cost and tech needed to adjust nozzles for space, air, and water all fell under that. Given how much a reconfigurable system costs, using that to cover your ability to get full rocket thrust underwater should do, Id think. I do wonder if we could figure out a vortex system to get underwater speed up. It seems to be a TL 9 design feature if the real world is any indication, and spaceships like the Vorpal Blade feature it prominently. But I digress.