Skillman Experimental Rocketry

Test 1, 2020-05-21-1

Ambient Temperature = 62 F

     ~Propellant Properties~
Fuel Mixture: potassium nitrate - sorbitol
Burn Time = 2.1 s
Grain Mass = 305 g
Segment Lengths = 3.97, 4.02 in
Grain Density = 1.7343 g/cm^3

         ~Performance~
Average mass flow = 0.14524 kg/s
Impulse = 299.3361 N-s
Isp = 100.0785 s
c* = 960.9145 m/s
Avg. CF = 1.0213

         ~Peak Values~
Max Thrust= 290.2558 N
   at t= 1.0536 s
Max Pressure= 557.2019 psi
   at t= 1.0556 s
Max Temeprature= 84.0983 F
   at t= 0.12563 s

           ~Misc.~
Burn start time after DAQ start: 46.6 s
Burn end time after DAQ start: 48.7 s
Note: 60/40 O/F, easy cast, slight oval
in one grain, 20.5hr dry