Hovercraft

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Hovercraft

• By Paul, Daniel, Brett,Keith

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How a Hovercraft works
A hover craft is a machine that rides on air
under pressure that is continuously supplied by
the lift system. A flexible curtain called a
skirt is attached to the base. The hovercraft is
propelled by a thrust propeller. The steering is
applied by using a rudder on the back of the
propeller.stopping is achieved with the reduction
of power engines or turning 180 degrees and
applying full thrust.
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History of the Hovercraft
The formative years of todays practical
hovercraft began as an idea to reduce the drag
placed on boats and ships as they plough through
water at high speeds. The term hovercraft was
actually a commercial name patented in 1955, then
subsequently released to public domain. The
hovercraft concept, however, can be traced back
to the early 1700s.The principle behind todays
hovercraft was originally demonstrated by Sir
Christopher Cockerell in 1955, using a
contraption constructed with a cat food can, a
coffee can and a set of kitchen scales.During
recent decades, this early demonstration has
metamorphosed into a vehicle that now performs a
multitude of vital services saving lives in
rescue operations transporting military troops
ferrying passenger and providing a vast array of
recreational opportunities to people throughout
the world.
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Basic hovercrafts
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Idea 1
Our first idea was basically a leaf blower motor
that blows air though a hole in ply wood. It will
also contain a hollow tire for the skirt.
L Leaf Blower Motor
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Idea 2
Our second idea was two leaf blower motors that
blow through two holes in a circular plywood
sheet into a round common skirt made from plastic
or rubber
L Leaf Blower Motor
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Idea 3
Our third idea was to have a triangular piece of
plywood with three separate leaf blower motors
at each corner, the leaf blowers blow into a
common skirt made of plastic
L Leaf Blower Motor
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Design sketch
This is our design for the hovercraft w/all the
lengths measured
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Materials needed

• 5/8 inch 4X8 particle board10.88
• Rubber lawn edge 20ft 5in..7.84
• 3 leaf blowers.priceless
• Duct tape.again priceless

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General safety procedures

• Always walk- do not run
• Never talk to or interrupt anyone who is working
  on a machine
• Remove power plug or turn off power supply to a
  machine when changing cutters or blades
• Never leave tools or pieces of stock lying on the
  table surface of a machine being used
• When finished with a machine, turn off the power
  and wait until the blade or cutter has come to a
  complete stop before leaving
• Always carefully check stock for knots, splits,
  metal objects, and other defects before
  machining.
• Do not use a machine until you understand it
  thoroughly. Any tool can cause serious injury if
  mishandled.

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Table Saw Safety procedures

• Table saw kickback can be caused by the workpiece
  getting pinched between the blade and the fence.
  It can also be due to the saw kerf closing up
  behind the blade. In each case, the workpiece can
  be hurled towards the operator at great speed. To
  avoid the danger, take the following precautions
• Make sure the fence is exactly parallel to the
  blade.
• Never tilt the sawblade towards the fence
• Feed stock straight through the blade crooked
  cuts are dangerous
• Never stand directly behind the blade. If stock
  is kicked back, this is the path it will take.
• When the width of the board is six inches or more
  use ripping cuts
• Crosscutting is used for short boards under six
  inches

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Drill safety procedures

• Disconnect the power plug before installing or
  removing drill bits
• Make certain the drill bit is clamped securely in
  the chuck
• Be sure the chuck key has been removed
• Do not force the drill. Use an even steady
  pressure
• Never use a bit with a square, tapered tang in an
  electric drill. The drills chuck will not hold
  this kind of bit securely
• When laying the drill down, always have the point
  away from you, even when it is coasting to a stop
• Never drill through cloth
• Always clamp small pieces do not hold them with
  your fingers when drilling

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Jig saw safety procedure

• Select the correct blade for the work and
  properly secure it in the chuck
• Be certain the material to be sawed is properly
  clamped
• Keep the cutting pressure constant. Do not force
  the cut
• When finished, turn off the power switch and
  allow the saw to come to a dead stop before
  setting the saw down.
• Hold the base down securely on the work when
  cutting.

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Staple gun procedures

• Always wear eye protection when using a stapler.
  Hearing protection also is recommended
• Never try to clear a jammed stapler while it is
  still connected to an air supply. Disconnect the
  tool from the air supply before performing any
  maintenance on it
• Never fire the stapler unless the nose piece is
  in contact with the work piece to be stapled
• Never carry a stapler with your finder on the
  trigger. If you should accidentally bring the
  nose of the stapler in contact with an object, a
  staple could be fired accidentally
• The moral of these rules are DONT SHOOT YOUR
  FRIEND

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Bibliography

• www.hovercraft.com/menu_how_it_operates.html
• http//groups.physics.umn.edu/pforce/hovercraft.ht
  ml
• http//www.howstuffworks.com/hoverboard.htm/printa
  ble