From: Onno Meyer > > That assumes aircraft with aerodynamic lift. TL10 is the period of > transition, with vectored thrust from fusion-powered ducted fans or > reactionless thrusters.
While the rules in GURPS Vehicles fail to reflect this, ducted fans are aerodynamic lift and need considerable area (the actual peak lift of a ducted fan is proportional to Power^2/3 * Air Density^1/3 * Fan Area ^ 1/3). > > > I wouldn't use the top speeds by TL for missiles in VE2, as they > seem > rather generous. 3,000-4,000 yards/second would be about my > upper > range at TL10. > > Depends on the size. For weights in the two figures, yes. For higher > weights, maybe not. Your big problems will be ISp (the rocket equation does apply) and peak acceleration (max thrust = chamber pressure * area at narrow end of nozzle; the efficiency of a nozzle depends on the ratio of area at its narrow end to area at wide end); most rockets have a limit to how much pressure they can handle. This is why the vacuum ISp of most rockets is higher than the atmospheric ISp. _______________________________________________ GurpsNet-L mailing list <[email protected]> http://mail.sjgames.com/mailman/listinfo/gurpsnet-l
