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The weapon has two hammerless shotgun barrels with a single rifle barrel underneath, firing two 12 gauge or 16 gauge shotgun shells (16 gauge seems to have only been used on the commercial version) alongside a single 9.3×74mmR rifle round. The M30 has two triggers and a sliding selector directly behind the lever for opening the breech.
Tilting-disc inconel check valve Check valve symbol on piping and instrumentation diagrams.The arrow shows the flow direction. Vertical lift check valve. A check valve, non-return valve, reflux valve, retention valve, foot valve, or one-way valve is a valve that normally allows fluid (liquid or gas) to flow through it in only one direction.
The Derringer used manufacturing techniques that were considered new at the time it was developed. Butt-joined, flush-riveted, chemically-milled and stretched skins are used throughout the airframe. Development of a two-seat Coin/military trainer version designated Wing D-2M Derringer was begun [4] but failed to develop further than the design ...
Robert Hillberg (August 27, 1917 – August 12, 2012) was a firearm designer and the head of Research & Development at the High Standard Manufacturing Company.His designs included the folding shotgun stock, the Whitney Wolverine lightweight pistol, Wildey.45 gas-operated pistol, COP .357 Derringer pistol, and M60 machine gun. [4]
The Coffman engine starter (also known as a "shotgun starter") was a starting system used on many piston engines in aircraft and armored vehicles of the 1930s and 1940s. It used a cordite cartridge to move a piston, which cranked the engine.
Double-barreled shotguns are also inherently more safe, [7] as whether the shotgun is loaded or can be fired can be ascertained by anyone present if the action is broken open, for instance on a skeet, trap or hunting clays course when another shooter is firing; if the action is open, the gun cannot fire. Similarly, doubles are more easily ...
An unusual feature of the Harrier family of aircraft is their use of two types of flight control to provide pitch, roll and yaw control: conventional control surfaces for wingborne flight, and a system of reaction control valves directing jets of bleed air from the high-pressure compressor of the engine out through the extremities of the nose ...
An alternative design concept for recoil-operated firearms is the inertia operated system, the first practical use of it being the Sjögren shotgun, developed by Carl Axel Theodor Sjögren in the early 1900s, a Swedish engineer who was awarded a number of patents for his inertia operated design between 1900 and 1908 and sold about 5,000 ...