Project Isinglass

A B-52 carrying two D-21 drones; Isinglass would have been carried and launched in this fashion

Project Isinglass was the code name given to two heavily classified, manned reconnaissance aircraft studied by the Central Intelligence Agency (CIA) as potential replacements for the Lockheed A-12 and SR-71 during the mid 1960s. The first proposal under the Isinglass name, a high-altitude plane to fly at Mach 4 to 5, was considered an insufficient advancement over existing aircraft; the second, much more advanced design, sometimes referred to as Project Rheinberry, was an air-launched, Mach 20 rocket-powered boost-glide aircraft that would use a very-high-altitude trajectory to avoid defenses. This aircraft was considered too costly for development, and the project was abandoned in 1967.

单词	Rheinberry
释义	Rheinberry 英语百科 Project Isinglass Project Isinglass was the code name given to two heavily classified, manned reconnaissance aircraft studied by the Central Intelligence Agency (CIA) as potential replacements for the Lockheed A-12 and SR-71 during the mid 1960s. The first proposal under the Isinglass name, a high-altitude plane to fly at Mach 4 to 5, was considered an insufficient advancement over existing aircraft; the second, much more advanced design, sometimes referred to as Project Rheinberry, was an air-launched, Mach 20 rocket-powered boost-glide aircraft that would use a very-high-altitude trajectory to avoid defenses. This aircraft was considered too costly for development, and the project was abandoned in 1967.
随便看	three lens objective的意思 three letter code的意思 three letter identification code的意思 three letter point的意思 three letter signal的意思 three letter signal code的意思 three letter singal code的意思 three level的意思 threelevel的意思 three level addressing的意思 three level generator的意思 three level hierarchical structure的意思 threelevel hierarchical structure的意思 three level jumbo的意思 three level laser的意思 three level laser rod的意思 three level maser的意思 three level recording的意思 three level return system的意思 three levels的意思 three level section的意思 three levels of prevention的意思 three levels of social prevention的意思 three level solid state quantum amplifier的意思 three level subroutine的意思