The Quad Vehicle designed

Quad vehicle

The specification for Pixel/Texel for level 1
Width: ~75 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.

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.