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The interceptor's launch is one sequence: the cap opens, the round is thrown out unlit and slows under linear gas drag (`cold` ticks), the motor lights where it has reached, it turns with a growing rate while thrust spools up (`boost` ticks), and full guidance starts only at `cold + boost`. A rail launch lights at once but spools over the same `boost` ticks; the electric P1-SUN has no rocket spool or plume. S-400/500 now hold the unlit ejection for 20/24 ticks (1.00/1.20 s at 20 Hz); IRIS-T/Tor keep shorter 8-tick throws. Ignition, its sound, flame and recorded MotorIgnition event all use the missile's current position. The RM48U strike follows the same 20-tick choreography, counts the throw in its flight time and starts its recorded smoke at ignition. Maximum speed, turn, accel, pk and every collision rule are unchanged. Co-Authored-By: Kimi Code <noreply@kimi.com>