Short Mayo Composite
| S.20 Mercury | |
|---|---|
| Image from a contemporary newspaper article, depicting Mercury atop Maia | |
| General information | |
| Type | Transport seaplane carried to flight altitude by Short S.21 Maia | 
| National origin | United Kingdom | 
| Manufacturer | Short Brothers | 
| Designer | 
 | 
| Primary users | Imperial Airways | 
| Number built | 1 | 
| History | |
| Introduction date | 14 July 1938 | 
| First flight | 5 September 1937 | 
| Retired | 1941 | 
| S.21 Maia | |
|---|---|
| General information | |
| Type | Flying-boat, launch aircraft for S.20 Mercury | 
| National origin | United Kingdom | 
| Manufacturer | Short Brothers | 
| Designer |  Arthur Gouge Robert H. Mayo | 
| Status | destroyed by enemy bombing 11 May 1941 | 
| Primary user | Imperial Airways | 
| Number built | 1 | 
| History | |
| Introduction date | 14 July 1938 | 
| First flight | 27 July 1937 | 
The Short Mayo Composite was a piggy-back long-range seaplane and flying boat combination produced by Short Brothers to provide a reliable long-range air transport service to North America and, potentially, to other distant places in the British Empire and the Commonwealth.