“If the SR 71 Blackbird flew at 1100 mph and maintained a maximum ceiling of 35,000 feet, would that indicate it was the top speed and flight ceiling of the aircraft?”
DO, you are way, way off. I just came back home on a trip in one of my BiL’s corporate jets and we were at 32,000 ft. and Mac .907 (about 625 mph at that altitude). FY, the SR-71 flew nominally at 85,000 ft @ Mach 3.2. And those are the numbers the government is willing to share. It quite likely was faster than Mach 3.2. The problem with going faster is getting rid of the heat. The other problem is that the higher you go, the narrower is the speed envelope. It has been said that the SR-71 at altitude has a speed envelope of about 20 mph between stall and VNE.
Take a look: https://www.blackbirds.net/bbirdm&f.html
D1 you got another one.
I’ve a cousin, now retired, who routinely flew the Blackbird.
D1 dramatically understated the capabiliti s to make his point.