In 1976, U.S. Air Force SR-71
Backbird crews flew from New York to London in less than two hours,
reaching speeds exceeding Mach 3 and setting world records that have held up
for nearly four decades.
But those world records may not stay
unbroken for long.
That’s because today, at the
birthplace of the Blackbird – Lockheed Martin’s Skunk Works® –
engineers are developing a hypersonic aircraft that will go twice the speed of
the SR-71. It’s called the SR-72
Son of the Blackbird
The SR-71 was developed using 20th century technology. It was envisioned with slide rules and paper. It wasn’t managed by millions of lines of software code. And it wasn’t powered by computer chips. All that changes with the SR-72.
Envisioned as an unmanned aircraft,
the SR-72 would fly at speeds up to Mach 6, or six times the speed of sound. At
this speed, the aircraft would be so fast, an adversary would have no time to
react or hide.
“Hypersonic aircraft, coupled
with hypersonic missiles, could penetrate denied airspace and strike at
nearly any location across a continent in less than an hour,” said Brad Leland,
Lockheed Martin program manager, Hypersonics. “Speed is the next aviation
advancement to counter emerging threats in the next several decades. The
technology would be a game-changer in theater, similar to how stealth is
changing the battlespace today.
A hypersonic plane does not have to
be an expensive, distant possibility. In fact, an SR-72 could be
operational by 2030. For the past several years, Lockheed Martin Skunk Works®
has been working with Aerojet Rocketdyne to develop a method to integrate
an off-the-shelf turbine with a supersonic combustion ramjet air breathing jet
engine to power the aircraft from standstill to Mach 6.
The result is the SR-72
that Aviation Week has dubbed “son of Blackbird” and
integrated engine and airframe that is optimized at the system level for high
performance and affordability.
Hypersonic Research and Development
SR-72 is not the first hypersonic Skunk Works® aircraft. In partnership with the Defense Advanced Research Projects Agency, engineers developed the rocket-launched Falcon Hypersonic Technology Vehicle 2 (HTV-2). The HTV-2 research and development project was designed to collect data on three technical challenges of hypersonic flight: aerodynamics; aerothermal effects; and guidance, navigation and control.
The SR-72’s design incorporates
lessons learned from the HTV-2, which flew to a top speed of Mach 20, or 13,000
mph, with a surface temperature of 3500°F.
A hypersonic aircraft will be a game
changer.
Taken from the web page of Lockheed Martin. Added ilustrations of SR-71 and HTV-2.
