COB-exact: timeline 1:1 from ARMACA.COB (rev31.gp3, the 3.1 balance). the ARM builder bird — its wings SLIDE out 5.6 elmo for construction, and that is its entire animation.
Animation

PNG frames

Frame 0 / 610.00 s
COB timeline (ARMACA.COB)
- 0.00–0.40 s — Cruise — wings stowed (the build scripts are empty returns; the nano spray is an engine effect)
- 0.40–1.44 s — RequestState: the wings SLIDE out 5.6 elmo each side at 5.6 elmo/s (1042 ms)
- 1.44–2.60 s — Construction hold
- 2.60–3.64 s — Wings fold back in (1042 ms)
- 3.64–4.10 s — Cruise
Activate/Deactivate/StartBuilding/StopBuilding are empty returns in this COB — construction itself is the engine's nano spray.