| Alpha Draco | |
|---|---|
 The Alpha Draco test vehicle | |
| Type | Experimental ballistic missile |
| Place of origin | United States |
| Service history | |
| In service | 1959 |
| Used by | United States Air Force |
| Production history | |
| Designed | 1957-1958 |
| Manufacturer | McDonnell |
| No. built | 3 |
| Specifications | |
| Length | 46.1 feet (14.05 m) |
| Diameter | 31 inches (790 mm) |
| Wingspan | 7.1 feet (2.16 m) |
| Engine | First stage, Thiokol TX-20 50,000 lbf (222 kN) Second stage, Thiokol TX-30 12,300 lbf (54.8 kN) |
| Propellant | Solid fuel |
Operational range | 240 miles (390 km) |
| Flight ceiling | 100,000 feet (30,000 m) |
| Maximum speed | Mach 5+ |
The Alpha Draco missile, also known as Weapons System 199D (WS-199D), was an experimental ballistic missile developed by McDonnell Aircraft in the late 1950s to investigate the aerodynamic physics of the boost-glide reentry trajectory. Three test flights were conducted in 1959, of which two were successful.