sl-mechanical
d93919e26f
Three new chassis design files for the SaltyTank continuous-track variant: • saltytank_chassis.scad — Deck plate (500×360×8mm Al, DXF export), 2× side track frames (6mm Al, CNC/laser), idler tensioner sliding block, 4× CSI corner camera mounts (45°/20°), D435i front bracket (8° tilt), stem collar (Ø25mm shared). Drive sprocket mounts accept hoverboard hub motors with caliper-verified D-cut bore (16.11mm/13mm flat) + 52mm BC hub flange bolt pattern. M6 tensioner bolt adjusts idler ±15mm for track tension. Shared FC 30.5×30.5mm + Jetson 58×49mm M3 patterns. Electronics bay footprint matches rover_electronics_bay.scad exactly. • saltytank_skid_plate.scad — Sacrificial underside skid panel (360×500mm). 4mm HDPE (DXF) or PETG print; countersunk M4 FHCS bolt-on. 4× drain/ inspection slots; optional printed ribs (RIB_PRINT=true). Ground clearance of hull between tracks: 90mm (exceeds 50mm requirement). • saltytank_BOM.md — Full BOM: deck plate, side frames, drive sprockets, idler wheels + tensioners, road wheels (2/side), track belts (1109mm circumference calc), skid plate, sensor brackets, electronics bay (rover_electronics_bay.scad reused unchanged). Frame mass ≈ 2.98 kg (just under 3 kg target). Assembly sequence and track tensioning procedure included. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>