Dispersion Sensitivity of the Eight Inch Advanced Ramjet Munitions Technology Projectile due to Wind and Minor Thrust Errors.
Abstract
Advanced Ramjet Munitions Technology (ARMT) is an ongoing DARPA project to research ramjet munitions. The ARMT eight inch projectile uses ramjet thrust for a boosted trajectory, but operates on a thrust drag balance concept to create pseudovacuum trajectory during powered flight. The trajectory was analysed using an IBM-370 computer simulation for three and five degrees of freedom. Work was also done to adapt the Ballistics Research Laboratories six degrees of freedom program to the IBM system. Projectile aerodynamic and mass properties were obtained from the Norden Systems Wind Tunnel Data. Dispersion fomr the vaccuum trajectory due to wind prior to ramjet burnout proved minor. Dispersion due to constant thrust errors under 5% was within a 600 radius at terminal guidance over a range of 33 miles. Originator supplied keywords include: ARMT eight-inch projectile; Pseudo-vacuum trajectory: Short period resonance; and Thrust-drag balance. (Thesis)
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1984
- Accession Number
- ADA152145
Entities
People
- S. R. Poole
Organizations
- Naval Postgraduate School