Rocket Motor

An Improvised Plastic Casing Retainer (Rocket Motor)

To make a casing retainer without metal working tools you can improvise. The improvised retainer is not as convenient to use as the welded steel kind, but it works just fine, as the 10.000 readers of my first topic can verify. To make an improvised retainer, proceed as follows. Cut a piece of Schedule 40. […]

Casing Retainers (Rocket Motor)

To make a dense and solid propellant grain and a tight fitting nozzle that won’t blow out. you have to ram in the propellant and the nozzle clay with considerable force. The expansive pressure generated when doing this is enough to split a cardboard tube, and you have to wrap something around the tube to […]

Core Spindles (Rocket Motor)

A core spindle {Figure 4-35 ) forms a rocket motor’s nozzle throat, and the hollow bore hole through the motor’s propellant grain. During the loading process the propellant and the nozzle clay are packed tightly around the spindle. When the motor is finished, the spindle is removed, leaving a long, narrow hole of the proper […]

An Improvised Core Spindle (Rocket Motor)

To make a core spindle without a metal lathe, again you can improvise. 1. Cut a piece of stainless steel rod slightly longer than the length indicated in the drawing. Square up the ends on a belt sander. and with a scribe or a sharp, indelible marking pen. mark the point where the taper begins. […]

Tamps (Rocket Motor)

Tamps (Figure 4-51) are used to ram the nozzle clay and the rocket propellant into the motor casings. Tamps have to be durable so that they last, but they also have to be light, so that they transmit the force of your hammer blows to the material being loaded. These two requirements completely rule out […]

Wooden Tamps – A Homemade Boring Jig (Rocket Motor)

To make a tamp without a metal lathe, you can improvise with a hardwood dowel. But the dowel you choose must be absolutely straight. The dowels sold by hobby shops, lumber yards, and hardware stores are often warped. When shopping for a dowel, sort through the whole pile, and pick the straightest one you can […]

An Improvised Wooden Tamp (Rocket Motor)

To use the jig. and make a wooden tamp, proceed as follows. 1. Saw the dowel to the proper length, and sand the ends square and smooth. Mount the dowel in a wood lathe, and sand its diameter down to a point where it slides in and out of the motor casing loosely without binding. […]

A Homemade Vacuum Chamber (Rocket Motor)

Important note. You do not need a vacuum chamber to make these rocket motors. Most of them run on propellants that contain a glue called a “binder”. During the loading process you soften the binder with a small amount of solvent. Before a motor can be fired the solvent has to evaporate, and these motors […]

Homeniade Sieves (Rocket Motor)

Homemade sieves are used to granulate oxidizers, and separate crushed coal and charcoal into different particle sizes. You” nl them to process the Mesqmte charcoal for the KG3 prcpellan, and possibly to granulate homemade sodium nitrate ( page 183). Figure 4-78 ts a photo of the 3 Steves you’ll need. You make them by stapling […]

A Homemade Coal Crusher (Rocket Motor)

The gadget in Figure 4-80 is a homemade coal crusher. It amounts to a piece of 4″ galvanized water pipe, 2 feet long with a flat cap on one end. and a piece of 2″ pipe, 4 feet long with a cap on one end. The small pipe fits inside the large pipe. To make […]

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