|Launch & Static Tests|
Number of Grains: 6
Total Grain Length: 15.15", 2.525" each
Total Propellant Weight: 1.65038 pounds, 748.6 grams
Grain Diameter: 1.6"
Core Diameter: .5"
Nozzle Throat Diameter: .435"
Kn: 306 initial, 355 maximum, 311 ending
Density: .0605 pounds per cubic inch
Burn Time: 2.534 seconds
Total Impulse: 215.47 pound seconds
Peak Thrust: 212.35 pounds
Maximum Chamber Pressure: ~1,000 psi (estimated)
Well, here we go, the inverted "V" thrust curve. I'm becoming more convinced it's a result of running the propellant at higher chamber pressure. The problem is, the Isp of 130 is very nice, but to get the high Isp the propellant must run at higher chamber pressure which seems to lead to the odd thrust curve.