McDonnell Douglas F-85 Goblin: – This early jet fighter was underpowered and lacked sufficient armament, making it ineffective in combat situations.
Brewster F2A Buffalo: – Despite being heavily promoted by the U.S. Navy, the Brewster Buffalo was outclassed by enemy aircraft during World War II due to its slow speed and poor maneuverability.
Grumman XF5F Skyrocket: – This twin-engine fighter aircraft suffered from engine reliability issues and inadequate performance, leading to its cancellation after only a few prototypes were built.
Lockheed XFV Salmon: – Designed as a vertical takeoff and landing (VTOL) aircraft, the Lockheed XFV Salmon was plagued by stability and control problems, resulting in its inability to transition from vertical to horizontal flight effectively.
McDonnell XF-85 Goblin: – Intended as a parasite fighter to be carried by larger bombers, the McDonnell XF-85 Goblin's small size and limited range rendered it impractical for operational use.
Saab 21R: – This Swedish fighter aircraft suffered from poor performance and reliability issues, making it unsuitable for combat operations despite being heavily modified from its predecessor.
Avro Canada CF-105 Arrow: – Despite its advanced design and capabilities, the Avro Canada CF-105 Arrow was canceled by the Canadian government in 1959, leading to the loss of a promising aircraft program and talented aerospace workforce.