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Ammonium Perchlorate Composite Propellant; 7.5% Aluminum; 82.5% Solids
70 inches of characterized propellant in three 5.125” outer diameter grains of varying geometry to balance regressivity (finocyl) and progressivity (BATES)
Phenolic liner and casting tubes; bonded to liner with polyurethane; one liner splice
Stepped cores to mitigate erosive burning.
Parameters (as calculated in Burnsim 3.0):
Kn: 267-331 | Max Pc: 779.7 psi | Web: 1.69 in |
Burn Time: 8.2 sec | Propellant Length: 70 in | Propellant Mass: 74.12 lb |
Class: P9067 | Delivered ISP: 225 sec | Volume Loading: 84.4% |
Initial Thrust: 1786 lb | Thrust/Weight: 24.1 | Impulse: 74347 N s |
Hermes 2 burnsim file from January 19th 2019:
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