Hi, what are you looking for?

19FortyFive

All posts tagged "J-58"

SR-71 Blackbird Sideview. Smithsonian Display Photo Taken by 19FortyFive on 9/30/2026.

SR-71 Blackbird Sideview. Smithsonian Display Photo Taken by 19FortyFive on 9/30/2026.

Aerospace & Defense

At Mach 3.2, Standard Jet Fuel Would Have Exploded Inside the US Air Force SR-71 Blackbird’s Tanks. Shell’s JP-7 Flashed at 140 Degrees, Boiled at 550 and Cooled the Whole Jet

A lit match dropped into a bucket of JP-7 went out. The fuel dissolved hose linings, demanded its own fleet of 56 modified KC-135Q...

Sean SpoontsOctober 1, 2026

SR-71 Blackbird at Night

SR-71 Blackbird at Night

Aerospace & Defense

Lockheed SR-71 Blackbird’s Pratt & Whitney J58 Engines Ran at Full Afterburner for Hours at a Time With Exhaust Temperatures Near 3,400 Degrees. At Mach 3.2 Cruise, Roughly 80 Percent of the Thrust Came From the Inlet, Not the Engine.

The J58 burned JP-7, a blend so hard to ignite that a lit match dropped into it goes out. Starting the engines required a...

Steve BalestrieriSeptember 11, 2026