Republic SD-4 Swallow

SD-4 Swallow
Role Reconnaissance drone
National origin United States
Manufacturer Republic Aviation
Primary user United States Army
Number built 0

The Republic SD-4 Swallow was an early high-speed reconnaissance drone developed by Republic Aviation for the United States Army. Intended for use by the U.S. Army Signal Corps to target tactical ballistic missiles, it was cancelled before the first prototype could be completed, and did not see operational service.