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Mould surface handover note - Sérac Aero SA-1 (v7, 2100 mm)

For the pattern maker / composite shop. Files in remo-spec/styled_v6/ (A-surface) and remo-spec/v7/ (engineering).

Coordinate system

Millimetres. X across the box (+X to the right looking forward), Y along the box (−Y nose, +Y tail), Z up from the underside of the floor.
Origin on the floor underside, box centre. Closed outer envelope: X ±480, Y −1045 to +1045, Z 0 to 395.
Hinge axis: Y = −500, Z = 335, parallel to X. Lid opens 30° about this axis. Lid mass 5.0 kg with hardware.

Files

File	Use
`styled_v6/styled_base.stl`, `styled_v6/styled_lid.stl`	A-surface (outer skin) with the v1 styling: nose scoop, roof ribs, tail fins. Already split at the lid parting plane. Use these for the master models.
`v7/serac_box_v7_base.step`, `v7/serac_box_v7_lid.step`	engineering solids with 6 mm wall, flanges, seal groove, bosses, channels, holes. Use for inner surface, flange geometry, trim lines and hole positions.
`v7/serac_box_v7.step`	complete assembly with 19 hardware bodies (hinges, strut brackets, lock, rods, nose block, floor core).
`v7/serac_box_v7_hardware.stl`	hardware bodies as mesh, for interference checks.
`v6/zone_map_v6.svg`, `v7/laminate_v7.json`	laminate zones and layups.
`docs/silt.svg`	label artwork; label pocket 100 × 60 × 1.5 mm at Y = −440 under the lid.

Parting and trim

Lid parting plane: through (Y −500, Z 230) and (Y +1000, Z 185), i.e. sloping 1.7° down toward the tail. The A-surface STLs are already cut on this plane.
Base flange: 25 mm wide, 6 mm thick, with a 9 to 17 mm × 4 mm seal groove (EPDM D-profile 10 mm). Lid flange 25 × 3 mm, lifted 0.2 mm above the plane in CAD (zero gap when the seal is compressed).
Forward of the hinge the lid does not exist: the base continues as a fixed nose cap up to the hinge line at Y −500 (parting there is a plain vertical cut at Y −500 above Z 230).
Draft: the A-surface was designed for a two-part open mould per shell (base: pull up; lid: pull down). Minimum draft 3° on sides; the floor channels (Y −360 and +320, ridge Z 68) are open to the underside and pull with the base mould. Please check the nose scoop undercut (styled surface, Y < −900) and advise if a loose piece is needed.

Tolerance and surface

Master model accuracy ±0.3 mm on the flange plane, ±1.0 mm elsewhere. Flange plane flatness 1.0 mm over the length is the controlling tolerance (seal compression).
A-surface finish: gloss, ready for in-mould clear gel coat or post-applied 2K clear. Ribs and fins keep sharp edges with 1.5 mm radius minimum.
Inner surface: release film / peel ply texture acceptable.

Inserts and hardware positions (engineering STEP has them all)

Clamp bosses: 8 × M8 inserts at X ±320 and ±380, Y −360 and +320 (channel centres), boss top Z 68.
Hinges: two leaves per side at X ±300, Y −545/−515 (base) and −485/−455 (lid), 4 × Ø5.5 holes per leaf.
Gas springs: ball studs Ø8.2 holes through the side walls at Y −25, Z 259 (lid) and Y −275, Z 205 (base), both sides.
Latches: slots both sides at Y −150 and +450, one at the rear Y 926; lock cylinder Ø19 at Y +300, right side.
Strap anchors: Ø30 pads with Ø10 holes at X ±350, Y ±700. Strap slot 40 × 30 mm in the lid rear edge.
Drains: Ø8 at (0, −800) and (0, +480).

Note: the v7 STEP has the hole pattern; five holes on the right-hand lid (hinge screws and the strut stud) are listed in v7/v7_info.json under holes_fixed. If a hole is missing there, drill per this list and the mirrored left side.