[boxmonkeyracing]

The SR-71 was a wonderful plane way ahead of it's time. and the 3.0+ rating was AT sea level. only planes I know that fly that low normally are navy planes. working on planes for a living I know it's very possible for a plane rated at X speed at sea level it will fly a lot faster at altitude. the higher you go the less air friction you have. But the less usuable air for your engines. that's why the SR-71 had a scram/regular engine combo. but as has been stated Jetfire should not be an SR-71 because they have been retired for like a decade for a second time. if they are going to do a highly classified aircraft they should do aurora. It gives them an outlet to design their own AC and make it do mach 4+. Yes official line is we do not have a aircraft of such capabilities but we all know they've denied the existence of such AC before.