I dont understand. Jetfire died a long time ago. But it had to have been AFTER the creation of the SR-71???? How else did he take on the configuration of such a plane? Okay, so that sets his death after the 50's. Now you have to consider how he managed to get away with being disguised as a rather rare military vehicle, especially when they started becoming decommissioned... Where they generally have a lot of components removed, and their internals checked. THEY WOULD HAVE FOUND OUT HE WAS A TRANSFORMER. Not only that, he wouldn't be able to hide from any inspections either... Since he's friggin dead. Even if the government knew about transformers (ala the explanation of frozen megatron in T1), then they wouldn't keep Jetfire in a museum. Instead, they'd lock him up with Megatron... And probably speak about Jetfire's existence in the first movie.
Man this... This is just too much. What the fart. How do you screw up a SR-71, I have no idea. Thanks for making the movie feel like a poor tack on, Bay. Even if Bay cannot be blamed for not doing research on the Transformers beforehand.. You'd think he'd actually think about the real life vehicles they take after.