Post on 01-Feb-2016
description
Workshop 1 :• Make a canopy of any shape • Materials : a plastic bag , string• Tools : adhesive tape , scissors• Drop your car model attached to the canopy from
the second floor.• Record the time to reach the ground floor.• Where does it land ? How many meters away ?
Car with Parachute
Conclusions :• What factors to make a good
parachute ?• Big canopy• Long line• Many lines• Light• Shape of canopy• Drop in vertical ?! Wind problem
Workshop 2 :
Search the internet for photos of parachute of different designs such as rectangular , sphere , multiple canopies…
Internet references
• http://precision.aerodynamics.com/tutor/• http://inventors.about.com/library/inventors/blparachute.htm?ia
m=howstuffworks_SKD&terms=parachute
• http://www.howstuffworks.com/ejection-seat2.htm
• http://www.square1.com/Catalog/Catalog.html
• http://www.nationalparachute.com/page3.html
http://showcase.netins.net/web/herker/ejection/chute.html#quarter%20bag
http://www.xs4all.nl/~pdj/chute.htm
Workshop 2 :
Parachute
Pilot chute
canopyapex
Suspension lineskirt
Steering line
Workshop 2 :
WHY ?
Fall in vertical or in curve ?Workshop 2 :
Car with ParachuteWorkshop 3 :
• Repeat workshop 1
• Rope or string - length & how many ?
• Plastic sheet – shape & size ?
• How long to reach ground ?
• Fall in vertical or in curve ?
Big canopy , long rope ?
Big canopy , short rope ?
small canopy , short rope ?
Different shapes of parachutePlastic sheet , adhesive tape
X mm X / 2 mm X / 4 mm
Make a 8-sided polygon with one cutMaterials : plastic sheet
Tools : scissors
cut
References :Workshop 3 :
Car with Parachute : making of a 8-sided canopy
Up side down
Workshop 3 :
Car with parachute thro’ a tunnel
• how to hide & open parachute ?
• http://www.xs4all.nl/~pdj/chutfold.htm
Workshop 4 :
Program for parachute sizes
Package of parachute
Unpackaged of parachute Ground floor
WHY ?
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Parachute : canopy & lines
Do you need a packet to hold the parachute ?
A bag
Rectangle
Too small
Pilot chute
Big chute with pilot