| FF / SF "Fifi" | |
|---|---|
 | |
| General information | |
| Type | Naval fighter |
| Manufacturer | Grumman |
| Designer | |
| Primary users | United States Navy |
| Number built | 116[1] |
| History | |
| Manufactured | 1932–1934 |
| Introduction date | June 1933 |
| First flight | 29 December 1931 |
| Retired | 1940 |
| Developed into | Grumman XSBF |
The Grumman FF "Fifi" (company designation G-5) is an American biplane fighter aircraft operated by the United States Navy during the 1930s.[2] It was the first carrier aircraft with retractable landing gear.[3] It was produced under licence in Canada and known as the Goblin in Canadian service and Delfín (English: "Dolphin") in Spanish service.