Designed to open.

Research record

The detail behind
the study.

Source-linked work for this revision. Reported checks describe the stated model or test; physical qualification and applicability to the current retrofit remain separate.

The current exterior Core adds a defined seal groove, captive screw closure and pinned cover. Graphite surfaces and restrained orange markings carry the Subfield family identity.

Concept — not released for manufacture. Material, clamp force, physical sealing, electrical packaging and production tolerances remain open. Pending evidence below is not a passing result.

Component table and individual STEP downloads

Seal and captive-screw calculations

Engineering scope and remaining work

The assembly has thirty separate solids, a continuous seal groove and hard-stop land, two captive commercial screw envelopes, custom pinned hinges and an opening stop. Closed, screw-released, 45° and 110° service poses use the same authoritative CAD. Individual parts retain their closed-assembly coordinates. Presentation axes are [construction X, -construction Z, construction Y + 300], in millimetres.

**CONCEPT. Not released for manufacture.** This is mechanical development and geometric evidence. Functional electronics, internal attachments, production material/process/tolerances, electrical protection, achieved seal compression, physical ingress, strength, wear and service qualification remain open.