The COR-VALK — Valkyrie, air transport — closes its four grabber arms around the cargo on pickupscr and opens them again on dropoffscr. The choreography is COB-exact: four concurrent y-turns at ~41°/s (arm1 +54.7° / arm2 −52.3° / arm3 −54.7° / arm4 +54.1°, 1326 ms), then the reverse at the same rate (1325 ms). The cargo itself is engine-side — the arms close on empty space here, and HitByWeapon’s base rock is an engine-driven hook (kept out of the loop).
Animation
PNG frames
Frame 0 / 960.00 s
COB timeline (CORVALK.cob)
- 0.00–0.40 s — Rest - arms parked
- 0.40–1.73 s — Arms close (COB pickupscr, 1326 ms)
- 1.73–4.73 s — Carry hold (preview: the cargo is engine-side in game)
- 4.73–6.05 s — Arms open (COB dropoffscr, 1325 ms)
- 6.05–6.45 s — Rest - loop close
All four arm turns run concurrently in the COB (no sleeps between them); the script’s trailing sleeps just hold the pose. Loop closes pixel-identically (seam gate: frame 0 == frame 96). 97 PNG frames at 67 ms.