Starting in the sixties, the CIA and the US Air Force operated a fleet of Lockheed Blackbird reconnaissance aircraft. At first, the aircraft were top secret, but over the years a lot of information has become unclassified. They were spectacular. Even now many of their speed and altitude records remain unbroken.
The most famous Blackbird is the SR-71 and those indeed were all black, as their name implies. However, some of the SR-71’s older relatives were not black at all or only partially black. My latest model represents one of these: the sole surviving M-21. This was a version intended to launch a ramjet-powered D-21 reconnaissance drone. The model is minifig scale (roughly 1/40), can seat a pilot and launch control officer under two separate cockpit canopies, and carries a model of the D-21 on its back.
Most of the outside of the real jet consists of unpainted metal. I like that it is not actually black; a lot of the details are much more visible that way. The aircraft still exists and is on display at the Museum of Flight, in Seattle, where I saw it during a trip to Washington State back in 2016. I also find the history of this particular version fascinating. To me it was the obvious Blackbird to build for my own LEGO aircraft collection.