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Muskets of the 16th to 19th centuries were accurate enough to hit a target of 50 cm (20 in) in diameter at a distance of 100 m (330 ft). At the same distance, musket bullets could penetrate a steel bib about 4 mm (0.16 in) thick, or a wooden shield about 130 mm (5.1 in) thick.
An H engine is a piston engine comprising two separate flat engines (complete with separate crankshafts), most often geared to a common output shaft. The name "H engine" is due to the engine blocks resembling a letter "H" when viewed from the front. The most successful "H" engine in this form was the Napier Dagger and its derivatives
The Nock volley gun. Henry Nock (1741–1804) was a British inventor and engineer of the Napoleonic period, best known as a gunmaker.Nock produced many innovative weapons including the screwless lock and the seven-barrelled volley gun, although he did not invent the latter despite it commonly being known as the Nock gun.
An engine is described as undersquare or long-stroke if its cylinders have a smaller bore (width, diameter) than its stroke (length of piston travel) - giving a ratio value of less than 1:1. At a given engine speed, a longer stroke increases engine friction and increases stress on the crankshaft due to the higher peak piston acceleration.
Victaulic is a developer and manufacturer of mechanical pipe joining systems, and the originator of the grooved pipe couplings joining system. [1] The firm is a global company with 15 major manufacturing facilities, 28 branches, and over 3600 employees worldwide.
nock The throat of the mainsail. [2] non-self-sustaining See self-sustaining. nun A type of navigational buoy, often cone-shaped, but if not, always triangular in silhouette, colored green in IALA region A or red in IALA region B (the Americas, Japan, Korea, and the Philippines). In channel marking its use is opposite that of a "can buoy".
Easton Sports, Inc. originated in the archery company Jas. D. Easton, Inc., which was founded in 1953 by James Douglas "Doug" Easton (1907–1972). In 1922, while recuperating from a shotgun accident, Easton read the book Hunting with the Bow and Arrow by Saxton Pope , and soon began making bows and arrows.
David Nock (1829–1909), politician in South Australia; William Nock (cricketer) (1864–1909), West Indian cricketer; Albert Jay Nock (1873–1945), American author; Arthur Darby Nock (1902–1963), English classical scholar and theologian; O. S. Nock (1905–1994), British engineer and railway historian; Bello Nock (born 1968), American ...