Solid fuel and ignition system

Internal Combustion Chamber:

The inside of the combustion chamber will be similar to the Systeme Solarie design. In many hybrid systems the solid fuel is molded like clay into a cylindrical shell with the shape of the combustion chamber. We could do that, but the solid fuel we are looking at using will be in a granular form. As shown above, inside the combustion chamber will be the ignition charge and a metal cylindrical shield. As shown below, the solid fuel will be placed on the outside of the metal shield. The fuel granules will burn from the top down, the exhaust gas will accelerate through the metal shield and then through the convergent divergent nozzle to create the thrust.

Cutaway view of the combustion chamber

Ignition Charge construction:

The Ignition charge is constructed from a vintage WWII Browning 0.50 caliber casing with the neck and shoulder cut off. The tri-leg stand was fabricated from a 1/16th inch plate and holes were drilled to accommodate the 1" set screws. The shell will be filled with potassium nitrate and topped off with an electric ignitor, some wading will be placed at the top to ensure ignition.