Quad (rocket)

Quad (rocket)

In rocketry, the Armadillo aerospace Quad vehicle is a computer controlled VTOL rocket that is used to compete in the Lunar Lander Challenge.

General description

The quad vehicle design is pressure fed in blow down mode from an initial pressure of 320 psi for level 1 (400 psi level 2). The roll thrusters are cross-fed by gas drawn from ullage space of the opposite tank. The vehicle is able to transfer propellant through connecting pipes between opposite tanks by controlling ullage pressures with the thrusters; this helps it balance, minimizing gas use. The main engine has two-axis thrust vectoring. The vehicle is fully computer controlled; with guidance from GPS and fiber optic gyros.

pecification

The specification for Pixel/Texel for level 1 [Email from John Carmack () to arocket list] :

*Width: ~75 inches [(diameter of spherical tanks are 36 inches)]
*Height: ~75 inches
*Dry weight: 650 pounds
*Gross Lift Off Weight (GLOW): ~1500 pounds (360 pounds ethanol, ~500 LOX)
*Payload: 55 pounds
*Engines: 1 (+ 4 cold gas attitude jets)
*Thrust (sl): ~3000 pounds

Engine (XPC-06):

*thrust: ~3000 pounds (throttleable to 25%)
*chamber pressure: 300 psi
*Nozzle area ratio: 2:1
*Isp (sl): ~140-~200 seconds (low-high throttle)
*length: 20 inches
*diameter: 8 inches
*chamber: carbon fiber reinforced graphite built by Cesaroni aerospace
*Burn time: >100 seconds, expected >180 for level 2, with approximately double the propellant mass.

ee also

References


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