HPR Rocket Ejection Charge Holders
thingiverse
Used on my L3 rocket. Currently 4g, 4.5g, 5g, and 6g charge holders. Sizes are calibrated assuming 1g of FFFFg = approximately 1 cc. All should have the same footprint - widths may vary slightly, but the mounting holes should line up. Secure with a stainless 8-32 screw and locknut, and use 2 x 4-40 stainless screws as terminals. Printed with 100% infill for strength. So far these have withstood up to 3 uses. Will probably update & fill in sizes as I have time. You are using black powder - use at your own risk.
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