Launch cadence is the number that separates the field

Every launch vehicle has an impressive payload chart. Very few have a flight rate, and flight rate is what decides whether a vehicle is a business or a demonstration.

Why cadence dominates

Fixed costs in launch are enormous — pads, ranges, integration facilities, standing engineering teams — and they are largely the same whether a vehicle flies twice a year or twenty times.

At two flights a year the fixed cost per flight is crushing. At twenty it is manageable. This is why per-kilogram comparisons between a high-cadence vehicle and a low-cadence one are close to meaningless.

What cadence requires

Pad turnaround — how fast the pad can be reset. Often the binding constraint and rarely discussed. Range availability — ranges are shared and scheduled; a vehicle can be ready and still wait. Stage production or refurbishment throughput. Payload supply — a vehicle cannot fly faster than customers deliver satellites.

That last point is underrated. Operators flying their own constellations have a payload supply nobody else has, which flatters their cadence relative to vehicles dependent on the external market.

Reading a manifest honestly

Announced manifests are aspirational. Compare announced flights for a year against achieved flights in the prior year. A vehicle that flew four times and announces sixteen is telling you about ambition.

Sources: NASA and Space.com. Analysis ours.