Encyclopedia Astronautica
Quad



zquad.jpg
Quad
Credit: Armadillo
American manned lunar lander. Study 2009. Prototype lunar lander developed by Armadillo Aerospace with private funds. Quad was the only entry in the 2006 competition for the X-Prize Cup Lunar Lander challenge.

Two VTOVL vehicles, Pixel and Texel, made three unsuccessful landing attempts.

The vehicle used four cold gas thrusters for attitude control. The main XPC-06 engine was pressure fed, and fitted with a 2:1 ratio nozzle for sea level operation (the specific impulse shown here was for operation with that nozzle; vacuum performance would be significantly higher). The uncooled thrust chamber was of carbon fiber reinforced graphite, built by Cesaroni Aerospace, and could handle burn times of over 180 seconds. The vehicle was autonomously controlled by a software program using GPS and fiber optic gyroscopes for position and attitude inputs.

Quad demonstrated technology that was to lead to a single-crew suborbital VTOVL prototype for the full-scale Black Armadillo.

Characteristics

Spacecraft delta v: 1,600 m/s (5,200 ft/sec).

Gross mass: 680 kg (1,490 lb).
Unfuelled mass: 290 kg (630 lb).
Height: 1.90 m (6.20 ft).
Diameter: 1.90 m (6.20 ft).
Thrust: 13.40 kN (3,012 lbf).
Specific impulse: 200 s.

More... - Chronology...


Associated Countries
See also
  • New Space Tourism With governmental manned space programs flagging, it seemed by the 21st Century that only civilian investors, building systems for toursim, might keep manned spaceflight alive... More...

Associated Manufacturers and Agencies
Associated Propellants
  • Lox/Alcohol Liquid oxygen was the earliest, cheapest, safest, and eventually the preferred oxidiser for large space launchers. Its main drawback is that it is moderately cryogenic, and therefore not suitable for military uses where storage of the fuelled missile and quick launch are required. Alcohol (C2H5OH) was the fuel used for the German V-2 rocket, and the first derivative rocket engines in the United States, Soviet Union, and China used it as well. Better performance was achieved by increasing the alcohol concentration in the post-war engines. But after better-performance rocket-grade kerosene was developed by Rocketdyne in the REAP program of 1953, use of alcohol was abandoned. More...

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