38mm rocket motor retainer
thingiverse
This motor retainer fits 38mm Loki Research high power rocket motors in a slim diameter rocket airframe. It attaches to the motor with a 1/4-20 bolt and stays put in the airframe by three 4-40 screws going through the wall. Three holes on top let you hook up a recovery harness using knotted ends. This retainer works best when paired with a fiberglass bulkhead plate, especially if you're attaching the harness directly to it instead of an eyebolt. To find the right spot for the holes, check out this drill guide: https://www.thingiverse.com/thing:3659562
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