Originally Posted by RockSim Simulation

Long-Payload Cherokee Double-D - Simulation results

Engine selection
[D12-0] [C11-5]
Simulation control parameters
Flight resolution: 800.000000 samples/second
Descent resolution: 1.000000 samples/second
Method: Explicit Euler

Launch conditions
Altitude: 0.00000 Ft.
Relative humidity: 75.000 %
Temperature: 80.000 Deg. F
Pressure: 29.9139 In.
Wind speed model: Calm (0-2 MPH)
Low wind speed: 0.0000 MPH
High wind speed: 2.0000 MPH
Wind turbulence: Fairly constant speed (0.01)
Frequency: 0.010000 rad/second
Wind starts at altitude: 0.00000 Ft.
Launch guide angle: 0.140 Degrees from vertical (RockSim came up with this number based on my input of 8 degrees)
Latitude: 31.000 Degrees

Launch guide data:
Launch guide length: 48.0000 In.
Velocity at launch guide departure: 46.8769 ft/s
The launch guide was cleared at : 0.307 Seconds
User specified minimum velocity for stable flight: 43.9993 ft/s
Minimum velocity for stable flight reached at: 43.8339 In.

Max data values:
Maximum acceleration:Vertical (y): 344.773 Ft./s/sHorizontal (x): 75.067 Ft./s/sMagnitude: 360.050 Ft./s/s
Maximum velocity:Vertical (y): 262.5643 ft/sHorizontal (x): 61.5565 ft/sMagnitude: 269.6709 ft/s
Maximum range from launch site: 356.43826 Ft.
Maximum altitude: 1028.80608 Ft.

Engine ejection charge data:
Using a delay time of : 5.000 Seconds
Velocity: 59.5263 ft/s
Altitude: 1021.48746 Ft.

Recovery system data
P: Parachute Deployed at : 7.462 Seconds
Velocity at deployment: 59.5263 ft/s <<<----- This is the killer figure. Instant shread...
Altitude at deployment: 1021.48746 Ft. <<<----- You should have pegged 1000', if only by a little margin!
Range at deployment: 314.46184 Ft. <<<----- Matches your estimate...

Time data
Time to burnout: 2.463 Sec.
Time to apogee: 8.005 Sec.
Optimal ejection delay: 5.542 Sec.

Landing data
Successful landing
Time to landing: 64.756 Sec.
Range at landing: 356.43826
Velocity at landing: Vertical: -18.1257 ft/s , Horizontal: 0.8891 ft/s , Magnitude: 18.1475 ft/s

Competition settings
Competition conditions are not in use for this simulation.