A B-1B Lancer 'gunship' may sound like something a kid doodles on his desk during a 4th-grade math class, but Boeing has actually been awarded a patent for just that.

U.S. Patent 9,963,231 B2 was awarded on May 8th to Boeing. It depicts a number of cannon configurations that can be stowed in a B-1B's weapons bays and extended down outside of those bays for use. Our good friend and marvelous patent sleuth Stephen Trimble of Flightglobal.com was the first to find the patent.

The patent certainly envisions different concepts that could be used to convert the 'Bone' into a heavy-hitting gunship without making many if any permanent changes to its existing configuration or outer mold-line. The cannons are shown mounted in various manners with elaborate mechanisms that allow them to tuck neatly inside the B-1B.

US Patent

US Patent

One includes a trapeze-like system that is mounted inside the aircraft's cavernous weapons bays, and when the bay doors open it drops down and is turreted to fire in different directions. The other shows a few variants of a semi-recessed mounting configuration where the guns drop down into a semi-recessed fairing installed on the belly of the aircraft and are fired sideways from that position.

US Patent

US Patent

US Patent

US Patent

As for the weapons shown, they look similar to M230 30mm cannons as well as the much larger Bushmaster cannon, which can run from 25mms to 40mms in size. One drawing even shows two different sizes of cannons mounted on the same turret side-by-side. The patent's description directly refers to using the guns for close air support and ground attack. It also seems fairly clear that these concepts could be applied to any aircraft with a voluminous weapons bay, not just the B-1B. The idea being that these kits could be able to more easily turn existing aircraft into gunships, packing a huge amount of firepower in a small space via compact, mechanized, space-saving designs.

Patent

The patent also describes how being able to store cannons inside the aircraft, instead of leaving their barrels hanging out in the aircraft's slipstream, results in certain benefits. These include the ability to go supersonic while toting around such weapons, increased range, better maneuverability and overall performance, and most interestingly, stealth:

Patent

Considering the future realities of warfare in anti-access and aerial denial situations, the idea of a stealthy gunship that can move faster and farther than an AC-130 without its massive radar signature is intriguing. Although stealthy transport and tanker aircraft have been and remain attractive concepts to the Pentagon, the B-1B is now slated to retire by around 2035. Although very complex and costly to operate, the jet is fast, has considerable range, is built to penetrate enemy air defenses at low altitude, and has a degree of low-observability (stealth) baked into its design. With that in mind, maybe Boeing will one day pitch a B-1B gunship in an effort to save a number of the aircraft from retirement.

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