const DROP_SECONDS: 8
How long a drop takes, seconds of wall clock.
Long enough that the scale change reads — a drop from an orbit worth of altitude to eye height crosses six or seven decades of height — and short enough that it is a move and not a wait. Tuned against a drop onto Earth from the default framing: at six seconds the ground arrived before the horizon had time to be a horizon; at ten the last decade dragged.
entryArc.ts:224