Sikorsky S-1

In February 1910 work began on the pusher configured biplane powered by a 15 hp (11 kW) Anzani three-cylinder, air-cooled engine.

The machine was completed in April and Sikorsky began his first attempts at flight.

In early May during a take-off attempt on a windy day the machine briefly became airborne due mostly to a favorable headwind.

Further attempts were less successful, and Sikorsky disassembled it, saving the main wing section to construct the S-2.

[1] Data from Russian Aviation Museum[2]General characteristics Performance