Instructables

Step 5: Pour the litter

Put about 1/4 inch of kitty litter into the tube being sure to press tightly against the working surface so not to spill any out.

Then,put the pencil in after to litter

Starting slowly, pound the pencil into the tube compressing the kitty litter

  • The reason Kitty Litter is used is because it is almost 100% Bentonite clay which is the same thing used in model rockets (the sealant)
 
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chemguy4 years ago
No, it is there to direct the hot gases and flames from the rocket to provide thrust. It's a nozzle.
ctimm154 years ago
its there to block up the ends
what exactly does the litter do?