Level 1 Rocket
Reloadable Motors
Single Use Motors
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Motors - General Information for Newcomers and the Curious
When I got into the hobby of high power rocketry, reloadable motors were a big scary mystery. There was a lot of text floating around on the internet, but not a lot of visual representations. Here are some 3D cutaway renderings of a 38mm reloadable motor system (color coordinated with the page). I'll try to add some more documentation later

Forward Closure Assembly
Left to Right
Ejection Charge Cap (paper adhesive disc)
Forward Closure (purple)
Black Powder Charge
Rubber Seal (blue)
3/32" Delay o-ring
Delay Insulator (dark grey fiber washer)
Delay Element
Spacer (green)
1/8' Forward o-ring
Forward Insulator
Propellant Grain and liners

Aft Closure Assembly
Propellant Grain and liners
Aft Insulator (dark grey fiber washer)
Aft 3/16" o-ring
Nozzle
Aft Closure (gold color)