LOST FIGHTERS A History of U.S. Jet Fighter Programs That Didn’t Make It List of Chapters: Chapter 1 Background Chapter 3 Lost Air Force F-100s and F-110s Series Fighters Chapter 2 Lost Air Force F-70s, F-80s, and Republic XF-103A F-90s Series Fighters Convair F-106X, F-106C/D Delta Dart Northrop XP-79A/B Follow-On Northrop MX-324 North American YF-107A Consolidated-Vultee XP-81 North American F-108 Rapier Bell XP-83 F-109 Republic XF-84H (XF-106) Thunderscreech McDonnell F4H-1/F-110A Spectre McDonnell XP/XF-85 Goblin Grumman/General Dynamics F-111B North American F-86H Sabre Jet YF-112 and Beyond Curtiss XP/XF-87 Blackhawk YF-112 Designator McDonnell XF-88/XF-88A Voodoo YF-113 Designator McDonnell XF-88B Voodoo YF-114 Designator Lockheed XF-90 YF-115 Designator Republic XF-91 Thunderceptor YF-116 Designator Convair XP-92/XF-92 Dart F-121 Designator North American YF-93A North American XF-95 Chapter 4 Lost Navy F1s and F10s Series Republic YF-96 Thunderstreak Fighters Lockheed YF-97A Convair YF2Y-1 Sea Dart Hughes XF-98 Falcon Douglas F3D-3 Skyknight Boeing XF-99A/B Bomarc McDonnell XF3H-1 Demon Douglas F5D Skylancer Douglas F6D-1 Missileer Vought XF6U-1 Pirate Vought XF8U-3 Crusader III Grumman F9F Cougar Grumman XF9F-9 and F11F-1 (Tiger), and F11F-2 and F11F-IF (Super Tiger) Vought F9U Grumman XF10F-1 Jaguar Grumman XF12F-1 Tiger Ryan XFR-1, XFR-2, XFR-3, and XFR-4 Fireball Variants Ryan XF2R-1 Dark Shark LOST FIGHTERS A History of U.S. Jet Fighter Programs That Didn’t Make It Chapter 5 Lost Air Force and Navy F-10s Chapter 7 Lost Air Force Major Modifi ed and F-20s Series Fighters Fighters Northrop F-5G Tigershark Piper Enforcer Fighter Convair F-7 Sea Dart Convair F-16XL (F-16E) SCAMP Lockheed YF-12 Blackbird Lockheed X-27 Lancer F-13 Republic XRF-84F FICON F-16/79 and F-16/101 F-16/79 Designator Chapter 8 Lost Air Force and Navy Fighter F-16/101 Designator Concepts Northrop YF-17 Cobra Temco 39 (Temco Corporation) F-19 D-188 (Bell) Northrop F-20 Tigershark D-188A (Bell) F-21A K r Adam II (Ling Temco Vought) Northrop-McDonnell YF-23 Black Widow II Advanced Day Fighter (General Dynamics) F-24 Unnamed Gull-Wing Fighter (Boeing) Unnamed Tactical Multi-Role Fighter (Grumman) Chapter 6 Lost Air Force, Navy, and NASA Unnamed Fighter Concept (Boeing) VTOL, STOL, and Research-Type Unnamed Swing-Wing Fighter Concept Fighters (Boeing) Lockheed XFV-1 Salmon Advanced Tactical Fighter Proposal Convair XFY-1 Pogo (Rockwell International) Zero-Length-Launch Fighters Advanced Tactical Fighter Concept Northrop X-4 Bantam (McDonnell Douglas) Bell X-5 Micro ghter (U.S. Air Force) Ryan X-13 Vertijet Supersonic Cruise Fighter Concepts (NASA) North American Rockwell XFV-12A Naval VTOL Concept Fighter (General X-21A EFM Dynamics) X-21A VECTOR Forward-Sweep F-16 Concept Fighter Grumman X-29A (General Dynamics) Rockwell International/MBB X-31A, and Boeing/ Thrust-Augmented VTOL Fighter Concept U.S. Navy/German BWB Agency and EADS (NASA) Company X-31A VECTOR L-133 Concept Fighter (Lockheed) McDonnell Douglas Losing Joint Strike Design 607A Concept Fighter (Grumman) Fighter Proposal Design 97 Concept Fighter (Grumman) Boeing Losing Joint Strike Fighter X-32 Night ghter Concept Fighters (Boeing) Proposal McDonnell Douglas X-36 About the Author.