Backyard Rockets by Instructables.com

Author:Instructables.com [Instructables.com]
Language: eng
Format: epub
Publisher: Skyhorse Publishing
Published: 2012-12-31T21:00:00+00:00

Step 1: Materials and Tools

Materials

• Some clay kitty litter (a few ounces of clean, clay-based kitty litter will do). This will make the fireproof plugs at both ends of the engine.

• A Milky Way candy bar for fuel

• Some potassium nitrate (salt peter; as pure as you can get) oxidizer

• Some thin-wall PVC pipe (about the same internal diameter as the carriage bolt head), cut into 2.5” lengths

• Some cannon fuse or model rocket engine igniter

Tools

• A small scale

• A hammer

• A grinder (mortar and pestle like I show here or a coffee grinder you don’t plan to use for food again)

• An anvil, chunk of steel, or other hard object to pound on

• A domed head carriage bolt (I believe the head size of mine was ¾” and it was about 4” long.)

• A drill, with 7 mm drill bit, and a counter sink drill bit (or a larger ½” bit will do too)

• A permanent marker

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