The YF-118G, explained: The Paramount+ streaming service could practically rebrand itself “Star Trek TV” – although it is also the home to the acclaim Yellowstone prequel 1883. Fans of the Star Trek series are likely familiar with the Klingon “Bird of Prey,” which remains one of the most common fictional starships to appear in the franchise. It was first introduced in the 1984 film Star Trek III: The Search for Spock, and has appeared in five of the films and frequently appeared in Star Trek: The Next Generation and Deep Space Nine.
The ship has been a fan favorite, which explains why a very real yet experimental aircraft developed by McDonnell Douglas and Boeing in the 1990s received the moniker “Bird of Prey.” Unlike the Klingon ship, the Boeing YF-118G doesn’t feature a “cloaking device” to make it invisible to the naked eye as well as scanners, yet the black project aircraft was in fact developed to demonstrate stealth technology.
As part of a secret project that ran from 1992 to 1999, the single-seat aircraft was actually a demonstrator used to test “low observable” stealth techniques as well as new methods of aircraft design and construction.
Sci-fi fans should also appreciate that the experimental craft was tested at the top-secret “Area 51,” where it made its debut flight in 1996.
The YF-118G Legacy
While it didn’t boldly go where no one had gone before, the YF-118G took to the skies a total of 38 times, and it was used to determine ways to make aircraft less observable not only to radar but also to the eye. More importantly, the program helped validate new ways to design and build aircraft using large single-piece composite structures, as well as “virtual reality” computerized design and assembly and disposable tooling.
Boeing also utilized standard “off the shelf” technology to reduce costs to develop the test aircraft, and that further sped its production. Among the not-so-secret components was its control system which is all-manual with no computer assists, while its landing gear was adapted from Beech King Air and Queen Air aircraft.
The Bird of Prey couldn’t reach warp speed either – as it was powered by a single, readily available Pratt & Whitney JT15D-5C turbofan that still provided 3,190 pounds of thrust, and allowed the craft to reach a maximum speed of 300 miles per hour, and a ceiling of 20,000 feet.
The aircraft made its final flight in 1999 and it was declassified three years later when its design techniques had become standard practice. Thanks to the Bird of Prey, Boeing was able to use those techniques in the development of X-32 Joint Strike Fighter demonstrators and later in its X-45A Unmanned Combat Air Vehicle prototype.
Part of the lasting legacy of the Bird of Prey remains its ability to demonstrate advances in stealth concepts, notably the “gapless” control surfaces that were developed to blend smoothly into the wings to reduce radar visibility, while the engine intake was completely shielded from the front.
Boeing donated the sole YF-118G Bird of Prey to the National Museum of the United States Air Force at Wright-Patterson Air Force Base (AFB), outside of Dayton, Ohio in 2002.
The once top-secret aircraft was put on public display on October 18, 2002 – and despite its stealthy technology, it is ready to be seen and photographed on a daily basis.
Bonus Photo Essay: Meet the F-22 Raptor
- A Lockheed Martin F-22A Raptor fighter streaks by the ramp at the 2008 Joint Services Open House (JSOH) airshow at Andrews AFB.
- Maj. Joshua “Cabo” Gunderson, F-22 Raptor Demonstration Team commander, performs at the Thunder Over New Hampshire Air Show at Pease Air National Guard Base in Portsmouth, N.H., Sept. 11, 2021. The mission of the F-22 Demonstration Team is to showcase the unmatched maneuverability of the Air Force’s 5th generation air dominance stealth fighter, highlight the history of the Air Force’s service though heritage formation flights, and interact with local communities through outreach events. (U.S. Air National Guard photo by Tech. Sgt. Steven Tucker)
- A U.S. Air Force F-22 Raptor receives fuel from a U.S. Air Force KC-135 Stratotanker assigned to the 340th Expeditionary Air Refueling Squadron, above the U.S. Central Command area of responsibility, March 14, 2022. The F-22 Raptor is a fifth-generation aircraft that combines stealth, supercruise, maneuverability, integrated avionics, and is designed to project air dominance, rapidly and at great distances, and deter regional aggressors while deployed in the USCENTCOM AOR. (U.S. Air Force photo by Staff Sgt. Frank Rohrig)
- Eight F-22 Raptors with the 325th Fighter Wing at Tyndall Air Force Base, Florida, receive fuel from a KC-135 Stratotanker from the 507th Air Refueling Wing from Tinker Air Force Base, Oklahoma, Feb. 7, 2022, while the Okies flew to the U.S. Virgin Islands for training. (U.S. Air Force photo by Lauren Kelly)
- A U.S. Air Force F-22 Raptor from the 95th Fighter Squadron, Tyndall Air Force Base, Fla., moves into position behind a KC-135 Stratotanker from the 100th Air Refueling Wing, RAF Mildenhall Air Base, England, to conduct aerial refueling Sept. 4, 2015, over the Baltic Sea. The U.S. Air Force has deployed four F-22 Raptors, one C-17 Globemaster III, approximately 60 Airmen and associated equipment to Spangdahlem Air Base, Germany. While these aircraft and Airmen are in Europe, they will conduct air training with other Europe-based aircraft. (U.S. Air Force photo by Tech. Sgt. Jason Robertson/Released)
Now a Senior Editor for 1945, Peter Suciu is a Michigan-based writer who has contributed to more than four dozen magazines, newspapers and websites. He regularly writes about military hardware, and is the author of several books on military headgear including A Gallery of Military Headdress, which is available on Amazon.com. Peter is also a Contributing Writer for Forbes.
