Final Project

Final Test Launch Stats

Our rocket went about 339 feet, not as far as our first test launch. Also the nose cone was dented beyond repair. This is the end of our rocket.

Modifications From Test Launch

For our next launch we will have to remake the nose cone because when the rocket landed the nose cone was dented beyond repair

First Test Launch

In our first test launch our rocket went past the last milk jug to the final small soccer goal. I think to improve our    rocket we could smooth it down even more to make it more aerodynamic.

today we constructed and designed our rockets. we started by making all the the other parts. we made the fins out of cardboard and covered them in duck tape to make them waterproof. we made them diamond shaped. Then we made the nose cone (its a parabola, because we found that its the most aerodynamic shape) by cutting the top of a bottle off, and cutting the neck off of that. We then go our bottle pressurized so that it wont shoot out when we launch it. Then we connected all the parts with hot glue, and reinforced everything with duct tap. We are ready to test launch tomorrow and make corrections. 

i was on a website (http://www.water-rockets.com/article.pl?121,0) that said the fins should be a diamond shape, and to put the fins as close to the bottom as possible

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.