Final Project(:

Practice Launch!

This is the video of our rocket in action!! It went 88 meters!!!!

I think we should take the sparkles off of the fins...we need to reduce the drag.

Fin design :)

Other side of our fins!

Our blueprint

Almost done...I love all the glitter!!!

I can't wait to attach our fins tomorrow...I hope it works as planned! [fingers crossed]

Cat fins

Cat

Our two rockets combined

Our sparkly rocket

Almost done! :D

Day 1: Designing.

Our bottles at the beginning of the process.

Our Blueprint.

Emily, working hard . (;

Emily disassembling a rubber band ball.

Our competition, James Moore.

Today we did a lot of designing and actually starting to build our rocket.  First, we drew our blueprint.  In our blueprint, we have one bottle going inside of the other with a rubber band ball in it.  We then measured all of our distances and started to assemble.  From Emily's research, we found out that we need a parabola shaped nose cone so we constructed one from cardboard, ductape, and the remanning bottle.  From my research, we concluded that to be more aerodynamic and try and minimize drag, we needed to use 3 triangular shaped fins instead of 4.  After, we got the rubber band ball and stuck it inside of the nose cone.  I'm looking forward to seeing how our constructing goes today and what else we can accomplish.

Today we made blueprints and started making our rocket. We have decided to use a parabola shaped nose cone because from the website below and many other reliable sources we have found that this is the best design to use. We have decided to construct the nose cone out of cardboard and duct tape because by using the rocket simulator I found that it was best to use that kind of material. Form Addison's use of the rocket simulator we found that it is best to use three fins instead of four because it decreases the rockets mass which helps it cut through the air quicker.

B.T.W. I will be posting the blueprint tomorrow because I forgot to bring my tablet home.

http://www.education.com/science-fair/article/rocket-nose-cone-science/

DATA SHEET

Flight One Flight Two Body: Payload Height (cm): 1.905 Nozzle Radius (cm):.9525 Fairing: Yes Fairing radius (cm): .007 oz/in2 Nose Cone: Shape: conical Material:Cardboard Propulsion: Water (liters):? Pressure (KPa): ? Fin Design: Fin Height: 1.5 Fin Shape: trapezoidal Number of Fins: 3 Fin Dimensions: 1.5 by 1 by 0 Body: Payload Height (cm): 1.905 Nozzle Radius (cm): .9525 Fairing: Yes Fairing radius (cm): .007 oz/in2 Nose Cone: Shape: Conical Material: Cardboard Propulsion: Water (liters): ? Pressure (KPa): ? Fin Design: Fin Height:  1.5 Fin Shape: Trapezoidal Number of Fins: 4Fin Dimensions: 1.5 by 1 by 0 Launch Stats: Max Altitude (m): 34 Max Velocity (m/s): 24 Launch Stats: Max Altitude (m): 26 Max Velocity (m/s): 17 This is my data.  I, like Emily, decided to only change one factor at a time.  The factor that i decided to change was the number of fins. When i had less fins, it made the rocket lighter.  This made the rocket go higher and faster then the rocket with 4 fins.  From this data, i have concluded that Emily and i should use not 4, but 3 fins.

Data from rocket simulator

DATA SHEET
Flight One Flight Two Body: Payload Height (cm): 1.905 cm Nozzle Radius (cm): 0.9525 cm Fairing: Yes Fairing radius (cm): 0.032 g/cs Nose Cone: Shape: Conical Material: Hollow Plastic Propulsion: Water (liters): ? Pressure (KPa): ? Fin Design: Fin Height: 3.81 cm Fin Shape: trapezoidal Number of Fins: 3 Fin Dimensions: 2.54 by 3.81 by 0 Body: Payload Height (cm): 1.905 cm Nozzle Radius (cm): 0.9525 cm Fairing: Yes Fairing radius (cm):  0.032 g/cs Nose Cone: Shape: Conical Material: Gray Cardboard Propulsion: Water (liters): ? Pressure (KPa): ? Fin Design: Fin Height: 3.81 cm Fin Shape: trapezoidal Number of Fins: 3 Fin Dimensions: 2.54 by 3.81 by 0 Launch Stats: Max Altitude (m): 7 Max Velocity (m/s): 13 Launch Stats: Max Altitude (m): 37 Max Velocity (m/s): 27

 This is my data...I used all of the same variables for everything except in the second flight I changed the nose cone material. It made a huge difference. When we build our rockets we are going to make our nose cone out of cardboard because it makes it cut through the air better and increases its velocity.

#1 Rocket Research

https://docs.google.com/viewer?a=v&pid=gmail&attid=0.1&thid=1376fd8bd1407475&mt=application/pdf&url=https://mail.google.com/mail/ca/?ui%3D2%26ik%3Dca71049099%26view%3Datt%26th%3D1376fd8bd1407475%26attid%3D0.1%26disp%3Dsafe%26zw&sig=AHIEtbRYuCLf99rkTcMXFZGxMuo7ei-IRw

This is my research from today...there are a lot of pros and cons to the size and shape of the fins. What do you think we should use? Also in the man's video I got this info from he does not use a closed pressure chamber...we will have to modify his design because we do not have anything to weld the bottles back together. For this experiment we will need two bottles, a weight (rubber band ball), poster card (for the nose) and a scale...I can get a rubber band ball and possibly a few bottles. I can also get the poster board...could you (Addison) bring a few other bottles for different shape types? Thanks :)