For missions at high altitudes and speeds, both the crew wore a pressure suit, reminiscent of the early costumes astronauts. There was also the B version used for training, which had two nacelles, and accommodated two pilots in the cockpit rear was higher for the lead. The Blackbird was originally built with a nacelle, for only one pilot, were named A-12 in its second version, called the SR-71, had two nacelles for two crew seats in tandem, leaving the pilot in nacelle front, while the operator of going back in the cockpit. For the fuselage, all supersonic aircraft need sharp edges on the cockpit, engines and wings, wich the SR-71 is no exception. JP-7 not burning with the engine cold, so at the hour of departure was necessary to preheat the turbines with another "formula for witch," the Trimethyl borate - that was a characteristic green flame. His flight at high temperatures would not be possible without the special fuel developed for him, the JP-7 and little sticky so volatile that it was possible to erase easily a match in a bucket of JP-7.
Because the J-58 turbine large and too heavy (9-stage axial flow compression) to a common pneumatic system, the activation was done by a V-8 engine poisoned by gears connected directly to the turbine shaft in the first years (now the activation was done otherwise written below). Its fuselage was made of alloys titanium to withstand the high temperatures around 200-300 degrees Celsius caused by air frictionĪs its fuselage was made on plates in order to swell during the flight, the SR-71 is known to leak when they're down, by its hydraulic fluid freeze at temperatures of 30 ☌ and the peculiar mode of activation of the engines. The famous Clarence "Kelly" Johnson is the name behind many of the advanced concepts of aerodynamics that airplane.
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