Parachutes and Projectiles

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by RTN789
Last updated 6 years ago

Discipline:
Science
Subject:
Experiments

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Parachutes and Projectiles

Louis-Sebastien Lenormand made the first ever parachute in the 18 centries. It was first made of linen. Then Jean-Pierre Blanchard started making it out of folded silk. The first public jump was in 1783. The name parachute came from a french word "paracete", which means to protect against, and the french word "chute", that means fall. Now we parachutes in the military, skydiving, dragracing, and many other events.

Parachutes

Prototype (circle)Trial 1:Terminal Velocity - 1.428 m/sAcceleration - 7.497 m/s/sTrial 2:Terminal Velocity - 1.608 m/sAcceleration - 6.103 m/s/sFinal Design (rectangle)Trial 1:Terminal Velocity - 1.983 m/sAcceleration - 4.210 m/s/sTrial 2:Terminal Velocity - 2.074 m/sAcceleration - 2.776 m/s/sAM Class AveragesVelocity:-Prototype: 1.993 m/s-Final: 2.448 m/sAcceleration:-Prototype: 3.494 m/s/s-Final: 3.190 m/s/s

Testing Results

Our protoype design was a circlular parachute. It was made out of a trash bag with strings attached to it. We were told to make the parachute and then test it. After we got to desgin our own type of parachute with the same area as our prototype. There were many other designs we could have chose from; rectangular, to a pentagon shaped one, and to a hexagonal shaped one. We decided to make a rectangular parachute because we thought it was easier to make and test.

Graphs

Parachutes and Projectiles

History

Designs

Testing Video

Final Design (T1)

Prototype (T2)

Protopype (T1)

Final Design (T2)

Richard TranWesley Widener

Sub-SystemsThe two systems that are most important for a parachte are control and guidence. Guidence is steering the vehicle, or in this case the parachute. In the video to the left, the parachute doesn't fly straight down from where it was dropped. It landed off to the side. That means there is something effecting the parachute to make it go off course. A way to guide it better is make sure there is no wind currents. Control is how your vehicle goes and stops. For a parachute, the person letting go and gravity that is pushing down on the parachute are the controls. As it is going down air resistance is pushing against the parachute making it slow down to a constant velocity. You have to have a larger area in order for your parachute to fall at a slower velocity.


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