Rod seal longshot breech
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Experimental longshot breech using rod seal instead of conventional piston seal - abandoned
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https://www.reddit.com/r/Nerf/comments/q412iw/rod_seal_longshot_experimentation_details_in/
Longshot rod seal (instead of pusher piston seal) breech experiment
pusher_01 was the one I used, that eventually snapped.
pusher_02 and pusherreinforce should hopefully hold together a little better (oring seat a little more narrow also).
Uses 3.5mm (28mm ID) o rings for lipless base, and 2.5mm (14mm ID) o ring for the rod seal at the breech
I eventually abandoned the notion of 3D printed breeches due to struggles with reliability, but for the record, it worked OK, I found it only slightly less efficient than conventional brass/pusher breeches (I suspect that the improved airflow mitigated leakage and dead space losses), and reliability didn't seem too bad.
Category: Mechanical Toys