Headlines > News > Airlaunch conducts longest Vapak Burn to date

Airlaunch conducts longest Vapak Burn to date

Published by Ekkehard on Tue Apr 24, 2007 9:44 am
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Kirkland, Washington (April 17, 2007) -AirLaunch LLC and its teammates conducted its longest test fire to date of the QuickReachâ„¢ Small Launch Vehicle (SLV) Integrated Stage 2 (IS2) flight-type test article at the Protoflight Mojave Air and Space Port East Test Area on April 6, 2007.

The stage contained over 6 tons of vapor-pressurized (VaPak) propellant and burned for 191 seconds, representing a liquid-liquid burn and a transition of the liquid oxygen (LOX) from liquid to vapor phase. The HMX LOX-Propane engine performed as expected, testing the design of the injector with integral main propellant valve and demonstrating much lower than expected erosion rates on the ablative chamber. All test operation was initiated and controlled by the flight-type avionics wafer attached to the stage.

AirLaunch’s test was the longest VaPak burn in history. Aerojet conducted a 60 second burn using VaPak on a Titan motor in 1963, and Scaled Composites performed a 77 second burn using VaPak (oxidizer only) on the hybrid engine for SpaceShip One in 2004.

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