Propulsion as Financing Engine

Boom is trying to turn propulsion from a cost center into the financing engine for the whole company. Most airframers buy engines from a specialist and give up a big share of lifetime economics. Boom is doing the opposite. It is building Symphony itself, then selling a closely related stationary turbine called Superpower into AI data centers years before Overture enters airline service, so the same core technology can start generating revenue, field data, and manufacturing scale earlier.

• The airline side is a classic aircraft OEM model. Overture is sold to airlines, and Boom already lists orders and pre orders from United, American, and Japan Airlines. That gives Boom a visible customer set, but the larger prize is owning the engine and its aftermarket over decades of operation.
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• Selective vertical integration matters because engines are the hardest subsystem to outsource without losing control. Symphony is purpose built for supersonic cruise, and Boom set up its own Colorado test site in April 2025. That keeps schedule, performance, and certification learning inside the company instead of depending on Rolls Royce or GE.
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• Superpower makes the model unusual. Boom says the turbine shares about 80% of its hardware with Symphony, and Crusoe ordered 29 units for 1.21 GW with first delivery in 2027. In plain terms, data center buyers may fund the engine program before airlines ever take passenger delivery.
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If this works, Boom starts to look less like a single aircraft bet and more like a propulsion company with two markets. The next phase is about proving the shared core in the field, ramping turbine production, and carrying that reliability record into Overture certification and long term service revenue.