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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.
Valve timing diagram for a 4-stroke engine. With traditional fixed valve timing, an engine will have a period of "valve overlap" at the end of the exhaust stroke, when both the intake and exhaust valves are open. The intake valve is opened before the exhaust gases have completely left the cylinder, and their considerable velocity assists in ...
The triple-barrel shotgun is the rarest configuration, and arguably is an odd variant of a double-barreled shotgun rather than a drilling since it lacks the rifle/shotgun combination that all the other drillings have. The triple-barrel shotgun is generally laid out like a side-by-side shotgun, with the third barrel centered and below the other two.
Nikonov machine gun: Izhmash: 5.45×39mm Soviet Union: 1977 Nordenfelt gun United Kingdom: 1873 Rheinmetall MG14Z: Tactics Group GmbH: 7.62×51mm NATO Germany: 2014 Rheinmetall RMG 7.62: Rheinmetall Defence: 7.62×51mm NATO Germany: 2013 Twin Bren: 7.62×39mm China: 1935 Type 89 machine gun: 7.7×58mm Arisaka Japan: 1929 Type 100 machine gun: 7 ...
Four-stroke cycle used in gasoline/petrol engines: intake (1), compression (2), power (3), and exhaust (4). The right blue side is the intake port and the left brown side is the exhaust port. The cylinder wall is a thin sleeve surrounding the piston head which creates a space for the combustion of fuel and the genesis of mechanical energy.
The common valve spring system is satisfactory for traditional mass-produced engines that do not rev highly and are of a design that requires low maintenance. [1] At the period of initial desmodromic development, valve springs were a major limitation on engine performance because they would break from metal fatigue.
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AADE – American Association of Drilling Engineers [1] AAPG – American Association of Petroleum Geologists [2] AAPL – American Association of Professional Landmen; AAODC – American Association of Oilwell Drilling Contractors (obsolete; superseded by IADC) AAV – Annulus access valve; ABAN – Abandonment, (also as AB and ABD and ABND)