Why does Rifts have "Giant Robots"?

[say652]

i wanted a BIB O type super robot. just massive and flight capable, so 200mph seems like a fair number. now strength is 400 superhuman(again H.U. max) so at what point would robotic ps inflict supernatural damage. my idea is max lift/500= supernatural ps damage range. example superhuman ps of 50= a supernatural ps 30.

[taalismn]

Only reason the Macross (true setting(s); not Hobotech's) VF's can get away with what they do INATMO, is due to 'Energy Conversion Armour'.
In "Reel fizzix" settings, the best a flying giant robot could go INATMO is prolly around 200 to 300 mph without burning brightly like a lightbulb fillament. Even then they'd be encoutering massive buffeting from air resistance.]

And SR-71s tended to be rather leaky at rest, because it was already calculated how much the structure would expand when traveling(and heating) at Mach 3+

[Colonel_Tetsuya]

Well to be fair, most of the Macross Variable Fighters only go fast in jet/fighter mode in Atmo. In Battroid and Gerwalk, they tend to go WAY slower, if they can fly at all in Battroid (many of the older models cannot).