Roger replied to me: > >I'm thinking of firing "outward" on an elliptic orbit. After the > >projectile travels out through the apogee, it swings back to a > >perigee which happens to be on ground level. > > This is doable but fiddly, and the firing direction is likely to be > unexpected (e.g. up-and-back relative to the orbital path). As usual, > the more dV available the better.
Hello Roger, the math can be left to a TL10 mainframe. * If the enemy is concentrated on a relatively small part of the planet, maybe all firing can be done hidden behind the horizon. When the projectiles rise over the horizon, they are small, unpowered bodies. Sure, they can probably reconstruct who fired what from where once the projectiles heat up from reentry, but it cuts the warning time. * If the enemy is a single starship and the defender has lots of surface sensors and a few battle stations with a decent acceleration and delta-V, it can keep the stations behind the planet. Regards, Onno _______________________________________________ GurpsNet-L mailing list <[email protected]> http://mail.sjgames.com/mailman/listinfo/gurpsnet-l
