Model 204
Boeing · United States · Interwar (1919–1938)
The Boeing-Canada C-204 Thunderbird (also Boeing Model 204) was an American-Canadian biplane pusher-configuration seaplane — Boeing-Canada's principal 1929-1934 production aircraft + a derivative of the original Boeing Model 6 / B-1 seaplane lineage. Boeing designed the Model 204 in 1928-1929; Boeing-Canada produced the C-204 variant at Vancouver from 1929. About 11 Model 204s + 8 C-204s were built. The aircraft served private + commercial operators in the Pacific Northwest + British Columbia.
The C-204 used 1 × Pratt & Whitney Wasp 9-cylinder radial (450 hp) in pusher configuration above the upper wing. Maximum speed 160 km/h, range 644 km, service ceiling 3,810 m, MTOW 2,041 kg. Capacity: 3 passengers + pilot, all-wooden hull with linen-covered wood-frame wings. The pusher arrangement kept the propeller well above the waterline + improved forward-pilot visibility — typical of early flying-boat design. The C-204 differed from the US-built Model 204 in minor production details + radio fit for BC operations.
C-204 Thunderbird service spanned 1929-mid-1930s with Western Canada Airways, BC Air Transport, + private owners. The aircraft was particularly used for fish-spotting flights on the BC coast + the occasional charter passenger service. The Model 204 / C-204 family was Boeing's last commercially-significant seaplane design; subsequent Boeing seaplanes (Model 314 Clipper, 1939) addressed long-range trans-oceanic markets. Boeing-Canada production ended ~1934 with shift to other types. About 2-3 Model 204 / C-204 airframes survive in 2026 at North American + Canadian aviation museums.
For Kids — a shorter, friendlier version
The Boeing C-204 Thunderbird was a flying boat biplane built in 1929. It was made in both the United States and Canada. About 19 were built in total. It carried a pilot and three passengers over water.
The Thunderbird had a special engine setup. The engine sat above the upper wing and pushed the plane forward. This is called a pusher design. It kept the spinning propeller high above the water. It also gave the pilot a clear view ahead.
The plane was built mostly from wood. Its wings were covered in linen fabric. It was heavier than a large car, weighing over 2,000 kilograms. It could fly up to 160 kilometers per hour and travel about 644 kilometers on one trip.
The Thunderbird flew routes in the Pacific Northwest and British Columbia. Airlines like Western Canada Airways used it to serve remote areas. It was also used for fish-spotting flights. Small seaplanes like this were very important before roads reached every community.
Fun Facts
- The Thunderbird was built in Vancouver, Canada, starting in 1929.
- Its engine sat above the top wing in a pusher setup — very unusual for its time!
- The plane could carry three passengers plus a pilot on water landings.
- It was heavier than a large car, with a takeoff weight of over 2,000 kilograms.
- The Thunderbird could fly about 644 kilometers on a single tank of fuel.
- Its hull was made entirely of wood, while the wings were covered in linen fabric.
- About 19 Thunderbirds were built across both the United States and Canada.
- The pusher engine design gave the pilot a much better view of what was ahead.
Kids’ Questions
What makes a flying boat different from a normal plane?
A flying boat has a hull shaped like a boat's bottom. It can take off and land on water instead of a runway. The Thunderbird used rivers and bays as its airports!
What is a pusher plane?
Most planes have engines that pull them forward from the front. A pusher plane has its engine behind the wings, pushing the plane instead. The Thunderbird's engine sat above the upper wing and faced backward.
Where did the Thunderbird fly?
The Thunderbird flew in the Pacific Northwest and British Columbia in Canada. It helped connect remote coastal towns and was used for spotting fish from the air.
How long was the Thunderbird used?
The Thunderbird flew from 1929 to the mid-1930s. That is about five to six years of service. It was used by airlines and private owners during that time.
Variants
- Model 204 (US, 1928)
- Original US-built variant. 11 produced.
- C-204 Thunderbird (Canada, 1929)
- Canadian licence-built. 8 produced.
Notable Operators
- Western Canada Airways + private owners (1929-mid-1930s)
- BC coastal commercial + private flying boat operations.
Frequently Asked Questions
Why pusher configuration?
Early seaplane designs faced a fundamental design choice: tractor (propeller in front, pulling) or pusher (propeller behind, pushing). Pusher configurations dominated early seaplanes because (1) the propeller's elevation above the water reduced spray erosion + (2) the pilot's view forward was unobstructed by engine + propeller. The trade-offs: pusher propellers operate in the wake of the wing + hull, reducing efficiency by 5-10%, + maintenance access is restricted. The Model 204 / C-204 followed standard 1920s flying-boat practice. By the late 1930s, more powerful + lighter engines + improved hull aerodynamics let tractor + multi-engine configurations dominate, + pusher single-engine flying boats faded from production.
Sources
See Also
- Boeing 314 Clipper — Later Boeing trans-oceanic seaplane