The L72 was a 427 cu in (7.0 L) 90° overhead valve V8 big-block engine produced by Chevrolet between 1966 and 1969. Initially rated at 450 horsepower, the rating dropped to 425 hp (317 kW) shortly after its release (although there was no change in power).

The Lockheed Martin SR-72, commonly referred to as "Son of Blackbird," [1] is an American hypersonic concept intended for intelligence, surveillance, and reconnaissance (ISR). Proposed privately in 2013 by Lockheed Martin as a successor to the retired Lockheed SR-71 Blackbird , the SR-72 was projected by Lockheed Martin executives in 2018 to ...

Jan 2, 2024 · The SR-72 is allegedly designed to be unmanned, hypersonic, and reusable. Its primary functions will likely be intelligence, surveillance, and reconnaissance (ISR) activities.

The 427/425 HP L72 engine was the pinnacle of performance for Chevrolet in 1966. Even though it was the top engine in the Chevrolet line-up, only 1856 L72 full-size cars were produced out of a total of 1,499,878 units built for the 1966 Model Year (0.0012%).

Feb 8, 2025 · The SR-72 Darkstar, developed by Lockheed Martin's Skunk Works, is poised to become the fastest aircraft in history, reaching a staggering Mach 6 (4,000 mph or 6,400 km/h). Designed for hypersonic reconnaissance and strike missions, the Darkstar is expected to outclass the legendary SR-71 Blackbird.

Dec 17, 2024 · A True Game Changer: The SR-72 “Son of Blackbird” (also called the SR-72 Darkstar), Lockheed Martin’s hypersonic successor to the legendary SR-71, aims to achieve speeds of Mach 6. -This unmanned platform uses a turbine-based combined cycle (TBCC) engine, switching from a conventional turbofan to a scramjet for sustained hypersonic flight.

The basic T-72 is relatively underpowered, with a 780 hp (580 kW) supercharged version of the basic 500 hp (370 kW) V12 diesel engine originally designed for the World War II-era T-34. The 0.58 m (1 ft 11 in) wide tracks run on large-diameter road wheels, which allows for easy identification of the T-72 and descendants (the T-64 family has ...

The SR-72 is designed to reach speeds of up to Mach 6, thanks to its turbine-based combined cycle (TBCC) engine. This engine integrates conventional jet propulsion for takeoff and a scramjet engine for hypersonic flight.

Apr 13, 2021 · The SR-72 Son of Blackbird is envisioned as an unmanned, reusable hypersonic ISR and strike aircraft capable of Mach 6 flight, or nearly double the speed of its predecessor, the SR-71 Blackbird.

The other engines suffered the same fate: the 402 cubic inch V-8 dropped to 240 horsepower, the 350 cubic inch V-8 was rated at 175 horsepower, and the 307 cubic inch base model V-8 was reduced to 130 horsepower.