Research Summary Day 1

Water Rocket Simulation Results

Simulation number 2000, for 208.108.81.7

Parameters

Bottle Volume	1000 cc
Diameter	110 mm
Water Fill	500 cc
Launch Pressure	827 Kpa (120 PSI, 8.16 Bar)
Nozzle diameter	22.0 mm
Nozzle viscous losses	0.16
Dry mass	100.0 grams
Coefficient of drag	0.30
Initial Velocity	0.0 m/s
Launch Tube length	0.0 mm
Launch Tube diameter	22.0 mm

Results

Launch and thrust phase

Initial thrust 575.8N
Initial burn acceleration 949.8 m/s² (96.9G)
Average acceleration 1191.5 m/s² (121.5G)

Burnout

Burnout after 45 milliseconds
Burnout Velocity 53.2 m/s (191.4 kmh, 118.9mph)
Burnout Altitude 1.0 metres (3.3 feet)
Burnout acceleration 1677.7 (171.1G)
Drag force at burnout 3.1 newton (0.3kgf)
Deceleration due to drag 3.1G
Speed increase due to air pulse 6.2m/s

Coast

Drag-free coast 144.1 metres to apogee at 145.1 metres after 5.5 seconds
Actual apogee at 52.50 metres (172.2 feet) after 2.84 seconds

Crashdown

Crashdown speed 21.9 m/s (78.8 kmh, 49.0mph)
Total flight time 6.61 seconds

Water Rocket Simulation Results

Simulation number 2004, for 208.108.81.7

Parameters

Bottle Volume	1000 cc
Diameter	110 mm
Water Fill	750 cc
Launch Pressure	827 Kpa (120 PSI, 8.16 Bar)
Nozzle diameter	22.0 mm
Nozzle viscous losses	0.16
Dry mass	100.0 grams
Coefficient of drag	0.30
Initial Velocity	0.0 m/s
Launch Tube length	0.0 mm
Launch Tube diameter	22.0 mm

Results

Launch and thrust phase

Initial thrust 577.7N
Initial burn acceleration 669.8 m/s² (68.3G)
Average acceleration 407.1 m/s² (41.5G)

Burnout

Burnout after 94 milliseconds
Burnout Velocity 38.2 m/s (137.6 kmh, 85.5mph)
Burnout Altitude 1.9 metres (6.1 feet)
Burnout acceleration 573.5 (58.5G)
Drag force at burnout 2.0 newton (0.2kgf)
Deceleration due to drag 2.0G
Speed increase due to air pulse 0.4m/s

Coast

Drag-free coast 74.5 metres to apogee at 76.3 metres after 4.0 seconds
Actual apogee at 38.54 metres (126.5 feet) after 2.56 seconds

Crashdown

Crashdown speed 20.5 m/s (73.8 kmh, 45.9mph)
Total flight time 5.67 seconds

By only changing the amount of water inside of the rocket I found that we should add less water in order to make the rocket spend more time in the air and it will go higher in the air.