Abstract
Abstract : Systems are being developed to Investigate the feasibility of using an evacuated (vacuum) tube as either a launcher or booster for small to medium size projectiles. Two eight-inch diameter tubes are being fabricated to propel a one-to three-pound meteorological probe into the lower atmosphere. A 70-foot long tube can propel this projectile to approximately 7000 feet above ground level, while a 20-foot tube will send the same projectile to an altitude of approximately 3500 feet. A vacuum tube may be used to impart initial velocities in the range of 300 to 500 ft/sec to the ARCAS. This increased launch velocity will result in a 10 to 20 percent increase in peak altitude, with a simultaneous reduction in wind effect of 30 to 60 percent.
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