Skillman Experimental Rocketry

Test 2, 2020-05-21-2

Ambient Temperature = 63 F

     ~Propellant Properties~
Fuel Mixture: potassium nitrate - sorbitol
Burn Time = 2.5 s
Grain Mass = 308 g
Segment Lengths = 3.97, 3.99 in
Grain Density = 1.7404 g/cm^3

         ~Performance~
Average mass flow = 0.1232 kg/s
Impulse = 278.569 N-s
Isp = 92.2282 s
c* = 1033.795 m/s
Avg. CF = 0.87488

         ~Peak Values~
Max Thrust= 191.4689 N
   at t= 1.3619 s
Max Pressure= 449.8718 psi
   at t= 0.43887 s
Max Temeprature= 87.7861 F
   at t= 1.3609 s

           ~Misc.~
Burn start time after DAQ start: 63.3 s
Burn end time after DAQ start: 65.8 s
Note: 70/30 O/F, 3 drops surfactant,
hard to insert, 1 grain uneven core