Just to clarify, as yet, there is nothing said that RHE reaction weaponry is different than other reaction weaponry of that time. That is, RHE isn't the only reaction weapon that uses the super dimension spatial theory. I believe the RHE-0[...] to just be the model number of the munition (Like RMS-1) Egan would then step in and say that this is all speculation and that Kawamori has not specified what the accronyms stand for-which is fine. But, I believe that RHE would stand for Reaction High Explosive, but it could be Reaction High Energy. Reaction High Explosive, I believe would make more sense in a model number. High Energy weapons are any nuclear weapons (etc.). With the Valkyrie-use RMS-1, RMS could stand for Reaction Missile System. But that's not official, or is it? : P