Timelines · Aviation · 3 of 9
The first airliner that made money carrying nothing but passengers.
1935·290 km/h·~2 400 km·2× P&W R-1830 Twin Wasp radials, 1 200 hp each·21–28
· THE STORY
Before the DC-3, airlines survived on government mail contracts and treated passengers as a sideline. The DC-3 changed the arithmetic: it carried enough people, fast enough, far enough, and cheaply enough that ticket sales alone turned a profit. Within four years it was carrying most of the world’s airline passengers, and hundreds still fly today.
· WHY IT MATTERED
Twenty-one seats, 290 km/h and coast-to-coast in three hops meant revenue per flight finally beat cost per flight. The DC-3 is the aircraft that turned flying from a subsidised adventure into an industry.
· WHY IT MATTERED
All-metal stressed-skin construction, retractable landing gear, wing flaps, variable-pitch propellers and cowled radial engines had each appeared separately. The DC-3 combined them into one rugged, efficient package — the template every airliner since has followed.
· WHY IT MATTERED
Over 16 000 were built, including the military C-47 that carried the D-Day airborne landings. Operators joke that the only replacement for a DC-3 is another DC-3 — some have logged more than 80 000 flying hours.
· TRY IT
An airliner sells the area under this curve: every kilogram of payload displaces a kilogram of fuel once the aircraft is full. Slide the payload and watch the Breguet range equation price the trade — the economics that made the DC-3 revolutionary, drawn as physics.
Breguet range, R = η·(h/g)·(L/D)·ln(mᵢ/m_f) — ideal still-air numbers with no reserves or winds. The revolution is the shape of the curve: 21 passengers and 1 500+ km was, for the first time, a profitable combination without a mail subsidy.