Vacuum-Air Propulsion with a Supplemental Tube Inlet.
Abstract
A study of the vacuum-air propulsion system was conducted to determine the effect of a supplemental air inlet which allows air from the atmosphere to flow into the tube as soon as the vehicle has passed that location. An experimental study was carried out on a tube 80 feet in length and 2 inches in diameter. The supplemental inlet was located at approximately 20 feet from the breech of the tube. It remains closed by a solenoid valve until the pressure of the air behind the vehicle is sensed by a transducer, which then opens the inlet. Analysis of the experimental results indicates that the effect of the supplemental inlet is to eliminate the losses from fluid friction behind the projectile in the length of tube between the breech and the supplemental inlet. This produces higher projectile velocities (n/o-15%) for other wise similar conditions. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1968
- Accession Number
- AD0718761
Entities
People
- Charles Harman
- David Chen
- Gale Buzzard
- Sudhir Kumar
Organizations
- Army Research Office