Simple and reliable black powder gas generator for cone ejection, stage separation or parachute deployment.
This resin printed bulb is designed to fit a specific amount of black powder for a given rocket. The E match is hot glued into place and designed to fire with common flight computers like the Easymini, Marsa33, and Raven4.
CAD cross section of the bulb: The internal scoring is to prevent excessive fragmentation, and the ribbing at the base is to help hold the hot glue in place. The bulb can be easily customized to work with other current levels or black powder loadings as needed.
Bulb in action, there's some unburnt powder, you may be able to increase combustion efficiency with a thicker bulb and not completely filling the bulb.
Bulb after firing, the internal score actually works. These bulbs can also be rendered safe by smacking them against a hard surface to shatter the top and release the black powder.
Bulbs fitted into rocket for nose cone ejection and parachute deployment.
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