BALLISTIC CHARACTERISTICS OF NF PROPELLANTS.
Abstract
NFPA/TVOPA propellants having from 1 to 25% Al had measured impulse efficiencies of greater than 95%, with densities up to 1.93 gm/cc. Al content had very little effect on burning rate, but higher solids contents caused increased viscosities and higher tensile strengths. The burning rate of RH-SB-103 (15% Al) increased from 0.83 to 1.90 in/sec at 1000 psia as the oxidizer particle size decreased from 180 to 8 microns. The two fastest-burning NF propellants made with 8 and 15 micron oxidizer showed no tendency toward transition to higher pressure exponents at pressures up to 5000 psia. The temperature coefficient of RH-SB-103cd was found to be 0.11%/degree F over the range from -40 to +140 F. Liners with good bonding characteristics, acceptable insulating properties, promise of good storage life were developed. Motors containing up to 22 lbm of propellant were fired successfully. The specific impulse measured in a 7-lbm, 6-inch diameter motor was 262.8 lbf-sec/lbm. OPE/NFPA propellants had burning rates up to 3.3 in/sec at 1000 psia and values of 260.0 lbf-sec/lbm were obtained from 10-gram micro-motors. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 05, 1965
- Accession Number
- AD0366080
Entities
People
- B. L. Thompson
- S. E. Anderson