enow.com Web Search

Search results

1. Results from the WOW.Com Content Network

2. British Association screw threads - Wikipedia

   en.wikipedia.org/wiki/British_Association_screw...

   A 2BA thread is used to connect the metal barrel of a dart to its shaft — as such, it is one of the few common uses of this thread in North America. In the UK, 2BA threads are commonly found in the old imperial British Engineering Standards Association (BESA) conduit boxes , and 4BA threads in light switch and socket back boxes which are ...

3. Spear-thrower - Wikipedia

   en.wikipedia.org/wiki/Spear-thrower

   A silver Peruvian atlatl from the 12th-15th century Atlatl in use. A spear-thrower, spear-throwing lever, or atlatl (pronounced / ˈ æ t l æ t əl / ⓘ [1] or / ˈ ɑː t l ɑː t əl /; [2] Nahuatl ahtlatl [ˈaʔt͡ɬat͡ɬ]) is a tool that uses leverage to achieve greater velocity in dart or javelin-throwing, and includes a bearing surface that allows the user to store energy during the ...

4. Crossbow bolt - Wikipedia

   en.wikipedia.org/wiki/Crossbow_bolt

   An unusually small crossbow bolt with a tapered "waist" shaft section and rear skirt compared to a 1 euro cent coin A bolt or quarrel is a dart -like projectile used by crossbows . [ 1 ] The word quarrel is from the Old French quarrel (> French carreau ) "square thing", [ 2 ] specialized use as quarrel d'arcbaleste (> carreau d'arbalète ...

5. Undercut (turning) - Wikipedia

   en.wikipedia.org/wiki/Undercut_(turning)

   They are often used at the end of the threaded portion of a shaft or screw to provide clearance for the cutting tool, and also referred to as thread relief in this context. A rule of thumb is that the undercut should be at least 1.5 threads long and the diameter should be at least 0.015 in (0.38 mm) smaller than the minor diameter of the thread ...

6. British Standard Whitworth - Wikipedia

   en.wikipedia.org/wiki/British_Standard_Whitworth

   The Whitworth thread was the world's first national screw thread standard, [1] devised and specified by Joseph Whitworth in 1841. Until then, the only standardization was what little had been done by individual people and companies, with some companies' in-house standards spreading a bit within their industries.

7. Plumbata - Wikipedia

   en.wikipedia.org/wiki/Plumbata

   The plumbata consisted of a lead-weighted head attached to a wooden shaft with fletching, which allowed soldiers to throw them effectively over long distances. The Roman work De rebus bellicis and the Byzantine manual of war Strategicon , confirm their use and describe variations, such as the spiked plumbatae ( plumbata tribolata ).

8. Blowgun - Wikipedia

   en.wikipedia.org/wiki/Blowgun

   Dart is 15 to 56 cm (6 to 22 in) long and made of locustwood or other available hardwoods such as oak, ash, maple, walnut, etc., fletched with thistle down or rabbit fur, that provides an air seal. [8] Jakaltek — wooden blowgun averages 1 m (3 ft) long with a sight placed 30 cm (12 in) from the end. Clay pellets are the most common type of ...

9. Armour-piercing fin-stabilized discarding sabot - Wikipedia

   en.wikipedia.org/wiki/Armour-piercing_fin...

   Armour-piercing fin-stabilized discarding sabot (APFSDS), long dart penetrator, or simply dart ammunition is a type of kinetic energy penetrator ammunition used to attack modern vehicle armour. As an armament for main battle tanks , it succeeds armour-piercing discarding sabot (APDS) ammunition, which is still used in small or medium caliber ...