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The surface of the pusher for the secondary is now so hot that it is also ablating or expanding away, pushing the rest of the secondary (tamper, fusion fuel, and fissile spark plug) inwards. The spark plug starts to fission. Not depicted: the radiation case is also ablating and expanding outwards (omitted for clarity of diagram).
A boxer-style flat-six engine is able to have perfect primary and secondary balance.As in other six-cylinder engines, the overlapping of the power strokes of the different cylinders (with a firing interval of 120 degrees in a four-stroke engine) reduces the pulsating of the power delivery relative to that of similar engines with fewer cylinders.
British 64 pounder rifled muzzle-loading (RML) gun on a Moncrieff disappearing mount, at Scaur Hill Fort, Bermuda The BL 8 inch disappearing gun of the South Battery, at North Head in Devonport, New Zealand A U.S. Coast Artillery battery with two guns on disappearing carriages Annotated photograph of an M1901 Buffington–Crozier disappearing carriage for an M1900 12-inch gun Inside a ...
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The recoil system can either be integral with the barrel or the carriage. Some guns designed before recoil mechanisms became integrated on the gun carriage could be attached to an external shock absorber which was a spring/rubber tether that attached to an eyelet on the base of the gun carriage and was attached to a ground anchor at the other end.
The Koehler Depressing Carriage was a novel type of gun carriage invented in 1782 by Lt George Frederick Koehler of the Royal Artillery. It was devised to enable cannon to be fired at a steeply downward-facing angle and was made necessary by the peculiar circumstances that the British Army faced during the Great Siege of Gibraltar between 1779 ...
The most common type of flat-four engine is the boxer-four engine, each pair of opposed pistons moves inwards and outwards at the same time. A boxer-four engine has perfect primary and secondary balance, however, the two cylinder heads means the design is more expensive to produce than an inline-four engine. There is a minor, secondary ...
Commissioned as a publicity stunt by THQ (a video game publisher that has since gone out of business) for Queen Elizabeth II, this gold-plated Wii stands out as a literal gem in gaming history.