--- On Fri, 7/22/11, Onno Meyer <[email protected]> wrote: > Brandon replied to me: > > MA Lloyd addressed this in his unofficial vehicle > expansions after VE2 > > came out. IIRC, a sub need to be at least 80% maximum > displacement or it > > couldn't sink. > > that is exactly what my formula gave -- when ballast tanks > > add 25% to displacement, so they are 20% of the total > component and tank volume. If all of the tank volume is > filled with water, the remainder must be between 80% and > 100% of flotation. > > Making subs this heavy is not a house rule, I simply keep > away from exploiting a loophole in Vehicles.
I'll note that the G:WWII line introduced bilges, which is as easy way to increase a ship's weight. It's mostly for surface ships, but can be useful for subs too. > > This may be where the planes of Sky Captain start > becoming impossible > > while the Russian project remains vaguely plausible -- > the Russian fyling boat, > > as best I could tell, only flooded the pontoons, with > wings, budy and > > engine pods sealed. The conning tower may or may not > have taken on water to > > improve submerged performance. > > Imagine a tiny submarine, with HP gas engines instead of > diesel. Instead of a screw propeller in the rear, it has > an aerial propeller in front. Add free-flooding wings. > > Why shouldn't that work just as well as any other small > submarine? Do the rules allow for an aerial propeller to provide hydrodynamic thrust?I think you'll need a prop for the air and a screw or hydrojet for the water. Not sure I'd want to flood the wings, since that's where fuel tanks usually go. > The submersible option doubles the weight and cost of the > hull. You ought to get something for that ... On the Soviet sub, I'd only require the pontoons to use the submarine option, the body and wings would merely be sealed. > > You may want to look at how Graham Hawkes _Deep > Flight_ submersible works > > as an alternative. > > That gets into house rules. I'm not certain the amphibious planes from Sky Captain can be done without house rules. > > Bigger wings, STOL wings! > > They already were STOL, and much more than 10 cf means it > won't > have the prop fighter look. There were large single-engined fighters ;) > > The biggest problem I see with the Sky Captain planes > is the transition > > between land and water. > > Six G for one second should be enough to lift the plane out > of > the water and accelerate to 100 mph. A solid rocket would > require 2.7% of Lwt per use. I'm thinking more of crashing into the water and not having the plane shatter on impact. Brandon _______________________________________________ GurpsNet-L mailing list <[email protected]> http://mail.sjgames.com/mailman/listinfo/gurpsnet-l
