US Army Materiel Command Acquisition Center, Army Research Laboratory Contracting Division, Attn: AMSRL-CS-PR, 2800 Powder Mill Road, Adelphi, Maryland 20783-1197

A -- DESIGN AND FABRICATION OF HIGH SPIN VELOCIY ACCELERATION/DEACCELERATION TESTING DEVICE SOL DAAD17-99-R-9273 DUE 071599 POC Frances E. Washington, Contract Specialist; Patricia S. Silsby, Contracting Officer High Angular Rate Spinner for Simulation of Artillery Launch Environment. Design, fabricate, install, and demonstrate a 7" diameter 330 revolutions per second (rps) spinner system (spinner) capable of accommodating government furnished cylindrically-shaped simulation components comprising a 50 lb./1.0 ft long solid aluminum projectile, a 20 lb./3 ft long crushable aluminum honeycomb mitigator, and a 1000 lb./8 ft. long solid steel Momentum Exchange Mass (MEM). Projectile total weight is inclusive of a 28 lb. payload undergoing the simulation. The simulation components are placed back-to back in the spinner's catch tube/device and spun to up to 330 rps prior to projectile entry. The projectile, having been propelled in the 7 " diameter/304 ft long pressurized gas gun (initial breach pressure of 300 psi @ 60F using air), exits the muzzle of the gun at approximately 1150 ft per second, and travels some 3 feet before entering the spinning catch tube/device and impacting with the shaped front end of the mitigator. A reversed ballistic simulation method is employed by which the projectile is brought to rest axially while concurrently assuming a spin rate of up to that set for the spinner (330 rps maximum), starting from zero rps (no-spin) condition. The spinning MEM is ejected from the catch tube/device at the conclusion of the simulation into a braking/containment chamber where its momentum is ultimately dissipated. All dimensions and weights are nominal figures. The spinner must be capable of withstanding all thrust and blast loads developed in the simulation as well as operate under control commands issued by an operator at a remote location (some 75 ft away). The spinner is to be installed in a specially designed catch room constructed with reinforced concrete walls. The 7'' gun muzzle is also situated in the catch room. A site inspection will be held to familiarize offerors with the simulation methodology and operating constraints. The spinner's installation site is at the Ballistic Environment Simulation Facility of the U.S. Army Research Laboratory/Weapons and Materials Research Directorate's experimental mechanics facilities, located at Adelphi, MD (suburban Wash. D.C. area). THIS IS A 100% SMALL BUSINESS SET-ASIDE. Posted 06/02/99 (W-SN338054). (0153)

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