Boeing CQM-121 Pave Tiger
A tailless SEAD drone that reached flight testing before cancellation.
The Boeing CQM-121 Pave Tiger was an unmanned aerial vehicle built by Boeing for the U.S. Air Force. Designed to suppress enemy air defenses (SEAD), it was flight-tested but ultimately canceled.
Development started in 1983 when Boeing received a contract for a small drone to counter enemy air defenses. The prototype, the YCQM-121A, was a tailless craft with a two-stroke engine. It was stored in a 15-cell container with folded wings; the container’s sides opened for launch via a rail and solid-fuel rocket booster. After launch, the drone followed a pre-set route, using electronic countermeasures or a small warhead to disable or destroy air defense systems.
Thirteen YCQM-121A aircraft began flight tests in 1983, but the project ended the following year. It was revived in 1987 as an alternative to the AGM-136 Tacit Rainbow anti-radar missile. This anti-radar version, designated YCGM-121B and codenamed "Seek Spinner," first flew in 1988. It carried a warhead to destroy enemy radars and could loiter until it detected a radar signal. This program was canceled in 1989.
Also in 1987, the Air Force ordered an electronic countermeasure variant, the YCEM-138A Pave Cricket, equipped with an AN/ALQ-176 jammer. That program was also canceled in 1989.
Variants included the YCQM-121A Pave Tiger (original jamming drone, 13 built), the YCGM-121B Seek Spinner (loitering anti-radar missile), and the YCEM-138A Pave Cricket (electronic countermeasure version of the YCGM-121B).
Quick Facts
- Aircraft Type
- Anti-radar drone
- National Origin
- United States
- Manufacturer
- Boeing
- Primary User
- United States Air Force
- Number Built
- 13 (YCQM-121A)
- Retired
- 1989
- First Flight
- 1983
Facts from the source article.
Lore & Background
The CQM-121 program began in 1983, with Boeing awarded a contract to develop a small drone for suppressing enemy air defenses. The resulting YCQM-121A, codenamed Pave Tiger, was a tailless aircraft powered by a two-stroke engine. The drones were fitted in 15-cell containers with wings folded; the sides of the container would open to allow launch on a rail using a solid-fuel rocket booster. The aircraft would then follow a pre-programmed route and could either use electronic countermeasures to suppress air defense systems or use a small warhead to directly destroy them.
Flight testing of the 13 YCQM-121A aircraft began in 1983, but the following year the project was terminated. The aircraft was resurrected in 1987 as an alternative to the AGM-136 Tacit Rainbow anti-radar missile. The anti-radar version, designated YCGM-121B and codenamed Seek Spinner, first flew in 1988. It was equipped with a warhead for the destruction of enemy radars and could loiter while awaiting detection of an enemy radar set. This program was terminated in 1989.
Also in 1987, the U.S. Air Force ordered an electronic countermeasure version, designated YCEM-138A Pave Cricket, equipped with an AN/ALQ-176 jammer. That program was also cancelled in 1989.
Reader's Guide
The Boeing CQM-121 Pave Tiger represents an early attempt by the United States Air Force to field a dedicated unmanned aerial vehicle for the suppression of enemy air defenses. Its development spanned several variants, each tailored to a different aspect of the SEAD mission: radar jamming, direct destruction of radars, and electronic countermeasures. Despite reaching flight testing with 13 aircraft built, the original Pave Tiger was cancelled in 1984. The concept was revived in 1987 as the YCGM-121B Seek Spinner, a loitering anti-radar missile that first flew in 1988, and the YCEM-138A Pave Cricket electronic countermeasure version. Both were terminated in 1989. The program's cancellation highlights the challenges of developing cost-effective drone-based SEAD systems in the 1980s, though its design—a tailless, container-launched drone with a two-stroke engine—influenced later approaches to expendable unmanned systems.
Did You Know?
- The drones were stored in 15-cell containers with wings folded and launched on a rail using a solid-fuel rocket booster.
- The YCEM-138A Pave Cricket was equipped with an AN/ALQ-176 jammer.
Frequently Asked Questions
What is the Boeing CQM-121 Pave Tiger?
It is a tailless, expendable drone that Boeing built for the U.S. Air Force starting in 1983, intended to fly into contested airspace and take down hostile radar and missile batteries.
What was the Boeing CQM-121 Pave Tiger's primary mission?
Its sole job was Suppression of Enemy Air Defenses (SEAD): it was meant to follow a pre-programmed flight path into enemy territory, deliver electronic countermeasures or a warhead against air-defense sites, and be sacrificed in the process.
How was the Boeing CQM-121 Pave Tiger launched?
The drone sat inside a 15-cell container with its wings folded; when the container's side panels swung open, a rail and a solid-fuel rocket booster shot it into the air.
What happened to the Boeing CQM-121 Pave Tiger program?
Thirteen YCQM-121A prototypes were built and put through flight testing, but the Air Force ultimately canceled the project, so the aircraft never entered operational service.
Why do UAV fans find the Boeing CQM-121 Pave Tiger interesting?
Its combination of a tailless airframe, a two-stroke engine, and a container-launched delivery method made it a strikingly unconventional approach to the SEAD problem, and it remains a notable example of early 1980s drone experimentation before the field matured.
More in Unmanned Aerial Vehicles by Country, Part 4 1-24
Spotted an error? Know more?
Reader corrections go straight into our review queue. Suggest an edit · How this site is sourced