christiaanj
hey mate i think youre right (by the way to the bloke who said its delta, it doesnt matter whether its delta or ogee when you are hypersonic, they both are poor when all the airflow over the upper surface is supersonic).
Anyway it must have something to do with structure design, fuel storage and transonic operations including air to air refuelling. It also might have somethng to do with getting supersonic in the first place. Even with the concorde it is sometimes a little confusing why they would use the ogee wing but i honestly think it is because cruise is not the only stage of flight, there is climb, descent and landing etc. Also, the concorde was only just supersonic (as in ALL airflow supersonic) so at times keeping the wing surface subsonic in cruise would be advantageous. I would have bloody loved to speak to the designer of the SR 71 in person, would be an interesting experience. What an aircraft