BALLISTIC SCALE-UP OF NF PROPELLANTS. I. 80 LBM MOTOR DEMONSTRATION FIRING,
Abstract
Production of an NFPA/TVOPA propellant having a new prepolymer binder system was scaled up from gram to multipound batches in six months. Ballistic scaling data on RH-SE-103cf were obtained in motors ranging in size from 10 grams to 80-lbm during this time. The burning rate was 0.97 in/sec at 1000 psia and the pressure exponent was 0.6. A specific impulse (Isps) of 261.3 lbf-sec/lbm (97% of theoretical) was obtained from the 80-lbm motor firing. The radar attenuation properties of RH-SE-103 (NF) and RH-P-112 (PNC) exhaust plumes were compared by measurements made about 1-ft and 5-ft from the nozzle exit planes. The X-band attenuation at the 1-ft measurement station was about 1.23 db for the high-energy NF propellant compared with 5.84 db for the PNC propellant. In a preliminary study of techniques for evaluating possible toxicity hazards, samples of exhaust gases from the 80-lbm motor were obtained for HF analysis using evacuated stainless-steel bottles. A polyester-based liner material which had been used with previous NF propellants was also satisfactory for the new system. Propellant would not bond well to fully-cured liner, but excellent bonds were obtained when the propellant was cast on partially-cured liner. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 17, 1966
- Accession Number
- AD0370635
Entities
People
- S. E. Anderson