5mm:
Parameters
Bottle Volume 2800 cc
Diameter 120 mm
Water Fill 900 cc
Launch Pressure 608 Kpa (88 PSI, 6.00 Bar)
Nozzle diameter 5.0 mm
Nozzle viscous losses 0.16
Dry mass 300.0 grams
Coefficient of drag 0.30
Initial Velocity 0.0 m/s
Launch Tube length 0.0 mm
Launch Tube diameter 5.0 mm
Results
Launch and thrust phase
Initial thrust 20.6N
Initial burn acceleration 7.4 m/s2 (0.8G)
Average acceleration 16.5 m/s2 (1.7G)
Burnout
Burnout after 1631 milliseconds
Burnout Velocity 27.0 m/s (97.1 kmh, 60.4mph)
Burnout Altitude 13.7 metres (44.9 feet)
Burnout acceleration 23.6 (2.4G)
Drag force at burnout 0.6 newton (0.1kgf)
Deceleration due to drag 0.2G
Speed increase due to air pulse 7.0m/s
Coast
Drag-free coast 37.1 metres to apogee at 50.8 metres after 4.4 seconds
Actual apogee at 43.56 metres (142.9 feet) after 4.03 seconds
Crashdown
Crashdown speed 25.4 m/s (91.5 kmh, 56.9mph)
Total flight time 7.15 seconds
11mm:
Parameters
Bottle Volume 2800 cc
Diameter 120 mm
Water Fill 900 cc
Launch Pressure 608 Kpa (88 PSI, 6.00 Bar)
Nozzle diameter 11.0 mm
Nozzle viscous losses 0.16
Dry mass 300.0 grams
Coefficient of drag 0.30
Initial Velocity 0.0 m/s
Launch Tube length 0.0 mm
Launch Tube diameter 11.0 mm
Results
Launch and thrust phase
Initial thrust 100.6N
Initial burn acceleration 74.0 m/s2 (7.5G)
Average acceleration 119.0 m/s2 (12.1G)
Burnout
Burnout after 336 milliseconds
Burnout Velocity 40.0 m/s (144.0 kmh, 89.5mph)
Burnout Altitude 5.1 metres (16.7 feet)
Burnout acceleration 156.0 (15.9G)
Drag force at burnout 1.8 newton (0.2kgf)
Deceleration due to drag 0.6G
Speed increase due to air pulse 7.0m/s
Coast
Drag-free coast 81.6 metres to apogee at 86.6 metres after 4.4 seconds
Actual apogee at 59.71 metres (195.9 feet) after 3.48 seconds
Crashdown
Crashdown speed 28.4 m/s (102.1 kmh, 63.4mph)
Total flight time 7.21 seconds