This is certainly a thought, but the idea that I might explore is using regions of significantly higher potential energy (say, near the top of a mountain) and using it to attack places of lower PE, using the portal to give the object kinetic energy without the bother of it having to fall between the intervening space.Darth Wong wrote:You could do it with a hydraulic cylinder anchored to the ground. It can apply great force to push a heavy object through the portal against resistance (thus making up the gravitational potential energy difference) until it's all the way through, at which point it falls like a stone. If they can open portals at will with pinpoint accuracy, this could potentially eliminate the need for bombers. You could run the equivalent of bomber sorties by simply lining up racks of ordnance on a portal-based delivery station and using hydraulics or some kind of sled launcher system to force the bombs through the portals.
Hydraulics might be safer than the high-speed sled launcher. It could be messy if the sudden sharp force gradient at the portal from a large potential energy increase triggers the bomb somehow. Subjectively, it would feel like hitting a wall.
For example, Denver is 1609 meters above sealevel, on average. Moscow has an altitude of 179 meters above sea level. Due to path independence, regardless of whether or not you route it through Hell or do it directly, an object gone from Denver to Moscow is going to gain roughly 14 kJ/kg. That's pretty significant. It means that you can do grevious harm to a location by simply pushing a boulder through the portal and also means that you are going to have to be careful if you want to peacibly travel via portal between areas of differing altitudes (and not be a missile).
Unless, of course, Hell has weird physics with their gravitational fields in addition to everything else weird about it.