#289 1962 · Rolls-Royce · Aerospace / jet engines
Rolls-Royce stopped selling jet engines and started selling flying hours, so a broken engine became the manufacturer's bill, not the airline's
the problem
A manufacturer selling a machine has no ongoing stake in whether it keeps working after the sale
background
A jet engine sold outright puts all the downstream risk on the buyer: once the sale closes, every hour the engine is grounded for unscheduled repair is the airline's lost revenue and the airline's maintenance bill, while the manufacturer has already been paid in full and has only a warranty period's worth of financial stake in whether the engine keeps running well after that. That split incentive is baked into almost every capital-equipment sale — the standard fix operators reach for is buying a service contract layered on top of ownership, which still treats maintenance as a cost the buyer manages, not a promise the seller is on the hook for.
Rolls-Royce introduced its Viper engine on the new de Havilland/Hawker Siddeley 125 business jet in 1962, a smaller, newer aircraft segment where unpredictable maintenance costs were a real barrier to operators willing to commit to owning and flying it. Rather than sell the engine and let operators absorb whatever maintenance turned out to cost, Rolls-Royce restructured the entire commercial relationship around the metric operators actually cared about.
what everyone would do
The standard fix operators reached for was layering a separate maintenance or service contract on top of an outright engine sale — the airline still owned the engine and paid a provider, often the manufacturer, for repairs as they arose. That still front-loaded the manufacturer's revenue at the point of sale, leaving it with only a warranty period's worth of financial stake in whether the engine kept performing well after the check cleared.
what they saw
Rolls-Royce saw that the problem wasn't a missing service offering, it was that revenue and reliability were structurally disconnected — the manufacturer got paid the same amount whether the engine flew flawlessly or spent half its life grounded for repair. Billing by verified flying hours instead of by the unit itself made Rolls-Royce's own income literally contingent on the engine staying in the air, turning reliability from a promise into the seller's own financial exposure.
the move
Rolls-Royce offered operators of the Viper-powered HS125 a complete engine and accessory replacement and maintenance service billed at a fixed cost per flying hour, rather than selling the engine and its upkeep separately — trademarking the arrangement 'Power-by-the-Hour.' Because Rolls-Royce's revenue depended on the plane flying reliably rather than on the initial sale, the manufacturer now bore the financial consequence of engine failures directly, instead of passing that risk to the customer at the point of sale.
why it works
Once revenue depends on flying hours rather than the initial sale, every unscheduled repair that grounds an aircraft costs Rolls-Royce money directly, not just the airline — which gives the manufacturer, not only the customer, a hard financial reason to design more reliable engines, stock spares efficiently, and respond fast to failures. Operators get predictable per-hour costs instead of unpredictable repair bills, removing a real barrier to adopting the aircraft in the first place, and because both sides now earn or save money exactly when the plane flies more, the arrangement scales without either side having to fight over who pays for each individual failure.
the payoff
Power-by-the-Hour became embedded in how Rolls-Royce sells and services engines industry-wide, and the model evolved into the CorporateCare programme launched in 2002 for business-jet engines, adding real-time engine health monitoring and a global maintenance network on top of the original per-hour billing; by the time Rolls-Royce marked the concept's 50th anniversary in 2012, more than half of the company's £11.3 billion in 2011 revenue came from services rather than one-time equipment sales.
where it breaks
The model needs flying hours (or whatever usage metric is billed) to be reliably verifiable independent of the customer's own reporting, and it needs the manufacturer to genuinely control enough of the reliability drivers — design, parts supply, maintenance network — to profitably absorb the risk it's taking on; a manufacturer with little influence over failure rates would just be accepting unpriced exposure. It also depends on a customer base large and diversified enough that individual catastrophic failures average out into a cost the manufacturer can price into the hourly rate — a single buyer with erratic usage or unusually harsh operating conditions can break the economics for both sides. And the administrative overhead of usage-based billing and monitoring only pays for itself on expensive, failure-consequential equipment; it isn't worth building for cheap gear where a repair bill was never a serious barrier to begin with.
what came after
The term 'Power-by-the-Hour,' though a Rolls-Royce trademark, became the generic name used across the aerospace and industrial-equipment world for performance-based or usage-based service contracts, and is now taught in operations and services-marketing curricula as the origin case for 'servitization' — manufacturers converting product sales into ongoing, outcome-tied service revenue, a model later echoed by everything from Software-as-a-Service pricing to equipment-as-a-service leasing in unrelated industries.
references
- [1]Rolls-Royce celebrates 50th anniversary of Power-by-the-HourRolls-Royce plc, 2012rolls-royce.com
- [2]Airplanes: Power by the HourGabelli Funds (GAMCO Investors), 2023gabelli.com