| S-40 | |
|---|---|
 Sikorsky S-40 PanAm 1931 | |
| General information | |
| Type | Amphibious flying boat |
| National origin | United States |
| Manufacturer | Sikorsky Aircraft |
| Designer | |
| Primary user | Pan American Airways |
| Number built | 3 |
| History | |
| Introduction date | August 7, 1931 |
| First flight | 1931 |
| Developed from | Sikorsky S-38 |
| Developed into | Sikorsky S-42 |
The Sikorsky S-40 was an American amphibious flying boat built by Sikorsky in the early 1930s for Pan American Airways. During WW2 they were used by the United States Navy for training.
This was the first of flying clippers, large flying boats of the 1930s used for long distance air travel. More advanced designs soon followed, but the S-40 was big step forward as it could carry 38 passengers as opposed to the S-38's eight.