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How to make a helicopter (for kids) out of a coffee cup

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Picture of How to make a helicopter (for kids) out of a coffee cup
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 This was an idea that came to me when I had a box cutter in one hand, and a coffee cup on the other, and I literally made it in 2 minutes. It's a quick and easy way that is good for entertaining kids (and adults too, sometimes)

Of course, it wasn't very symmetrical, and it didn't fly in a steady way, so I made another (this took about 10 minutes total, if you exclude the time I took to take the photos), and I took videos of it.





 
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Step 1: Marking the circle

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First I made the outline (of the top of the cup) on a piece of paper, and then I folded the paper in half, and then folded in half again to make into a quarter.

I then divided the quarter circle approximately into thirds. This I then used to make 12 markings on the cup.

The same was repeated for the bottom of the cup. (Pictures not included)

Step 2: Drawing the lines

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This one is fairly self explanatory. I used a felt pen to mark straight lines from the top  to the bottom of the cup

Step 3: Cutting along the lines

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I used a utility knife. The blades, being thin, do not distort the card too much while it is being cut.

After cutting along all 12 lines, I alternately cut along the top of the card to make the 'blades'

Step 4: Folding back

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After making the alternating cuts at the wider end of the cup, fold back the 'blades' at the base of the cup until it's level with the base.

Step 5: Launching it

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My first attempts at launching. They weren't upto par, as I discovered a few days after I took the video, since I found I could make it move about 10 feet forward by giving it a forward push.

A sharp twist of the wrist, while throwing it upwards is usually enough.  Feel free to try other methods.




To see if it could be launched bottom up, I found that it worked quite well.



And of course, the control.

To prove that this design actually converts a coffee cup into a flying object, I tried using the same hand motion on an uncut coffee cup



Step 6: Possible modifications


matass3 years ago
lol
anicolae5 years ago
 Nice Job!
sfcsarah (author)  anicolae5 years ago
Thanks!
Kiteman5 years ago
Have you tried giving the leading edge of each wing a slight upwards twist?
sfcsarah (author)  Kiteman5 years ago
 I have just tried, but it causes the helicopter to move backwards (video to be uploaded by the morning). A friend of mine suggested making the blades slightly tapered, and I shall upload that soon.

Thanks for the suggestion, though, it gave me something to try out.
:)
sfcsarah (author) 5 years ago
no, but I have been trying different cuts and bending the wings to see how it affects its movement. Are we allowed to edit the instructable while it is in the voting phase?