3 2 1 blast off l.jpg
This presentation is the property of its rightful owner.
Sponsored Links
1 / 18

3, 2, 1, Blast Off! PowerPoint PPT Presentation


  • 74 Views
  • Uploaded on
  • Presentation posted in: General

3, 2, 1, Blast Off!. Process. Read and understand the rules Research Design Build Test Analyze Fix. Important Rules. Build up to 2 rockets before the tournament Rockets will use 2 liter carbonated bottles MUST WEAR SAFETY GLASSES Nothing within 5 cm of the nozzle

Download Presentation

3, 2, 1, Blast Off!

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


3 2 1 blast off l.jpg

3, 2, 1, Blast Off!


Process l.jpg

Process

  • Read and understand the rules

  • Research

  • Design

  • Build

  • Test

  • Analyze

  • Fix


Important rules l.jpg

Important Rules

  • Build up to 2 rockets before the tournament

  • Rockets will use 2 liter carbonated bottles

  • MUST WEAR SAFETY GLASSES

  • Nothing within 5 cm of the nozzle

  • Launched at 75 psi

  • Can use any recovery system

  • Best single rocket time will win


What makes it work l.jpg

What makes it work?

  • Water is poured into the pressure chamber

  • Air is then pumped into the bottle.

  • When the rocket is released, the air forces the water out of the bottle.

  • Newton‚Äôs Third Law of Motion kicks in


Parts of the rocket and forces l.jpg

Parts of the Rocket and Forces


Pressure chamber l.jpg

Pressure Chamber

  • 2 Liter soda bottle

  • Do not cut or scratch the pressure chamber.

  • Can glue fins to pressure chamber with silicone or polyurethane glues.

  • If pressure chamber is damaged it will not be launched


Slide7 l.jpg

Fins

  • Fins keep the rocket stable in flight

  • There must be at least 3

  • Fins must be rigid

  • Backswept fins work best


Fin shapes l.jpg

Fin Shapes


What does it mean to be stable l.jpg

What does it mean to be stable?

  • Stability:the tendency of the rocket to return to equilibrium

  • This means if the rocket begins to veer, it will straighten back up on its own.

  • To be stable, the center of mass must be closer to the top of the rocket than the center of pressure


Nose cones l.jpg

Nose Cones

  • Popular types:

    • Conical

    • Blunted Conical

    • Elliptical

    • Spherical

  • Nose cones reduce drag

  • Conical are easy to make but can be difficult to get straight.


Recovery systems l.jpg

Recovery Systems

  • A recovery system is something that slows the rockets descent.

  • The two most popular at the parachute and the back-slider


Recovery systems12 l.jpg

Recovery Systems

  • The velocity of a falling object can be shown as follows

    where v(t) is velocity, g is acceleration do to gravity, c is the coefficient of air resistance, t is time, and v(0) is initial velocity.

  • C is much larger for a parachute than a backslider; therefore, it will fall much more slowly


Parachute l.jpg

Parachute

  • Parachutes work best but are harder to get to work consistently

  • The size needs to match the rocket.

  • It should have 8 to 10 strings

  • Fold it like an accordion and then wrap extra string around it to keep it folded


Making a parachute l.jpg

Making a Parachute

Cut Here


Making a parachute15 l.jpg

Making a Parachute


Backslider l.jpg

Backslider

  • Backslider is made by making the center of gravity close to the center of pressure

  • This prevents the rocket from turning over at apogee and instead floating down on its side.

  • Fins on this type of rocket should be larger to help slow it down.


Example backslider l.jpg

Example Backslider


Examples l.jpg

Examples


  • Login