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This is a simple 10 minute catapult that I built using the 521 piece K'NEX set. Using a strong rubber band I have been able to fire a marble ...
Here's a parts list. 4 red rods 3 yellow rods 3 bendable orange rods 2 white rods 11 green rods 6 grey 45 degree connectors 6 red 90 ...
first connect 2 red connectors with a green rod (X3) then attach the two grey sliding connectors, with the two blue connectors. next connect both of the blue ...
connect the two red assemblies with the blue green assembly as shown in the picture.
then create the vertical boom piece of the catapult with two yellow rods, and a red assembly. then attach two purple pieces with green connectors too the center ...
put two red pieces, with two straight orange snaps. then, attach the two pieces with two light grey connectors. the bottom grey piece is the one that one ...
slide a yellow rod through the two purple pieces and attach the arm. Then add two tan, two black, and a small gear as show in the picture.
now to make the pieces to help strengthen the body. attach two green connectors with a green rod, and two more light grey pieces to that with 2 ...
Attach the green piece tho the two main red rods of the body, and add two light grey connector on the inside of the two red rods. (see ...
After this add the final orange bendy rod to the back assembly. (see picture)
Now look at the included pictures to see where to attach the rubberbands.
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