Of the three heavy lift rockets Amazon booked four years ago for its 3,236 satellite Kuiper broadband constellation, Europe's Ariane 6 is the only one currently flying payloads, leaving hundreds of finished satellites waiting in Florida.
Several hundred flight-ready Amazon internet satellites are sitting in a Florida payload processing facility, with several more rolling off the manufacturing line every day. The company can build its planned 3,236-satellite Kuiper broadband constellation faster than almost any competitor. The problem is getting them to orbit: of the three new heavy-lift rockets Amazon booked four years ago to launch the constellation, only one is currently flying payloads.
That working rocket is the European Ariane 6, operated by Arianespace from Kourou, French Guiana. An Ariane 6 is set to carry three dozen Amazon Leo (Kuiper) satellites into low Earth orbit on Wednesday, with liftoff targeted for 7:53 a.m. ET from the Guiana Space Centre, according to Ars Technica.
The other two rockets Amazon contracted have not yet carried a Kuiper payload, per Ars Technica's reporting on Amazon's launch bottleneck. Blue Origin's New Glenn and United Launch Alliance's Vulcan, the heavy-lift successors to the workhorses of the early commercial space era, have lagged the cadence Amazon was banking on. The Atlas V, which flew most of Amazon's early missions, is heading to retirement, with one flight remaining before it is phased out.
"The rockets were the long pole," Steve Metayer, Amazon's vice president of Leo production operations, said on a press teleconference the day before the next Ariane 6 launch. "They're built, and sitting in a payload processing facility waiting for trips to orbit. We're currently manufacturing several satellites a day."
The bottleneck leaves Amazon in an unusual position. The company has solved the hardest part of building a broadband mega-constellation, which is manufacturing at scale, only to find that launch is now the constraint. To date, Amazon has launched 331 Leo satellites, the majority on Atlas V rockets. Roughly 10% of the planned 3,236-satellite constellation is in orbit.
Arianespace has become a critical launch partner by default, according to Ars Technica, precisely because the alternatives have not materialized as planned. The European rocket flew its first commercial missions after a development cycle that ran long, and it is now one of the few operational heavy-lift options Amazon can rely on. For the moment, the company is essentially a customer of a single rocket family, the exact concentration risk that a multi-launcher strategy was meant to eliminate.
The episode is a case study in how "new heavy lift exists on paper" and "new heavy lift is actually flying your payload" remain very different propositions, even for a customer with the capital to book capacity on multiple vehicles. Diversification only works if the alternatives are real.
What to watch next: whether Wednesday's Ariane 6 launch proceeds on schedule, how quickly Blue Origin returns New Glenn to flight, and whether ULA's Vulcan can pick up a Kuiper mission before the constellation's planned coverage targets start to bind.