Skillman Experimental Rocketry

Test 2, 2020-05-18-2

Ambient Temperature = 68 F

     ~Propellant Properties~
Fuel Mixture: potassium nitrate - sorbitol
Burn Time = 1.55 s
Grain Mass = 303 g
Segment Lengths = 4, 3.86 in
Grain Density = 1.7519 g/cm^3

         ~Performance~
Average mass flow = 0.19548 kg/s
Impulse = 332.5367 N-s
Isp = 111.9125 s
c* = 979.2567 m/s
Avg. CF = 1.1207

         ~Peak Values~
Max Thrust= 382.2352 N
   at t= 0.82273 s
Max Pressure= 724.905 psi
   at t= 0.82773 s
Max Temeprature= 91.4739 F
   at t= 1.3737 s

           ~Misc.~
Burn start time after DAQ start: 69.65 s
Burn end time after DAQ start: 71.2 s
Note: red grain, no rtv, cast 5/17 9pm
Infared temperature sensing of plume. Not
sure how accurate absolute value is but
can be used to compare different motors