Hovercraft - Unique Transport

Have you ever ridden on a hovercraft? it's like glide on a cushion of air! actually, that is specifically what you are doing—a craft could be a vehicle that glides over a swish surface on a cushion of air. as a result of a craft will travel over flat land or water, it's associate degree amphibian. during this activity, you will get to create your own mini craft employing a CD or videodisc, a pop-top lid from a plastic bottle, some glue and a balloon. however can completely different amounts of air within the balloon have an effect on however long the craft hovers?
Because a craft could be a vehicle that glides over a swish surface by riding on a cushion of air, it's conjointly known as associate degree air-cushion vehicle, or ACV. however is that the air cushion created, and the way will it enable the vehicle to glide over it therefore freely? Vents or currents of slow, unaggressive  air ar ejected downward against the surface below the craft. trendy ACVs usually have propellers on prime that make the air currents. These currents ar pushed below the vehicle with the employment of fans. encompassing the bottom of the ACV could be a versatile skirt, conjointly known as the curtain, that traps the air currents, keeping them beneath the craft. The unfree air currents will produce associate degree air cushion on any swish surface, land or water! The cushion greatly reduces friction, permitting the vehicle to glide freely over the sleek surface below.
    Pop-top lid from a plastic drinking bottle. (Reusable plastic drinking bottles typically use these varieties of lids.)
• associate degree recent CD or videodisc which will be created unusable
•     Craft glue or Super Glue
•     A medium-size balloon (should be able to inflate up to a minimum of twenty eight centimeters, or eleven inches)
• stopo watch or timer
• massive flat surface for testing the craft
 take away a pop-top lid from a plastic drinking bottle.
•     Glue the bottom of the lid to the CD (or DVD) in order that the lid covers the opening within the center. If you employ Super Glue, have associate degree adult facilitate, use caution, and follow all of the directions and safety warnings on the packaging.
• enable the glue to dry fully.
Procedure
• confirm the pop-top lid is closed.
•     Blow the balloon up as massive as you safely will while not sound it, then pinch the neck in order that no air will escape.
•     Stretch the neck of the balloon over the pop-top lid, being careful to not let any air escape. rigorously center the balloon's gap on top of the pop-top lid gap. Your completed craft ought to have CD flat on the lowest, pop-tip lid on top of and therefore the inflated balloon's neck stretched snugly round the closed lid. Your craft is currently able to do some hovering!
•     Tip: If the pop-top lid detaches from the CD and you used craft glue to attach them along, rigorously re-glue them victimization Super Glue.
•     Place the craft on a flat surface. begin your stopo watch or timer, open the pop-top lid and push the craft. Stop the stopo watch once the craft stops hovering. however long did the craft hover? Detach the balloon from the pop-top lid.
•     Repeat this method 2 a lot of times, inflating the balloon as massive as you safely will, reattaching it to the pop-top lid, and temporal arrangement however long the craft hovers. Did the CD hover for constant quantity of your time every flight, or was there some variation?

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