The Sikorsky S-34 was a 1920s American six-seat sesquiplane, designed and built by the Sikorsky Manufacturing Corporation. Only one was built, but the design led to the successful Sikorsky S-38.
Design and development.
The S-34 was a sesquiplane amphibian with a boat hull, being powered by two tractor Wright Whirlwind J-4 engines. It had a boom-mounted twin-rudder tail unit and room inside the hull for five passengers. During a test flight in November 1927, one engine failed and the S-34 crashed and sank. Igor Sikorksy and the others on board escaped without injury but the S-34 was destroyed. It was the first Sikorsky aircraft with a boat hull and would lead to a family of similar flying boats and amphibians.
Specifications.
"Data from" General characteristics* Crew: one* Capacity: five* Length: ()* Wingspan: () * Height: ()* Wing area: () * Empty weight: ()* Gross weight: ()* Powerplant: 2 × Wright Whirlwind J-4
 , 200 hp (149 kW) 
Performance* Maximum speed: (, ) * Range: (, ) * Endurance: 3 hours 0 minutes* Service ceiling: ()
References.
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