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  2. Contra-rotating - Wikipedia

    en.wikipedia.org/wiki/Contra-rotating

    Contra-rotating, also referred to as coaxial contra-rotating, is a technique whereby parts of a mechanism rotate in opposite directions about a common axis, usually to minimise the effect of torque. Examples include some aircraft propellers , resulting in the maximum power of a single piston or turboprop engine to drive two propellers in ...

  3. Superior Air Parts - Wikipedia

    en.wikipedia.org/wiki/Superior_Air_Parts

    Thielert already had a business relationship with Superior, as it had been engaged in the production of Superior's after-market engine cylinders. [ 3 ] In 2008, Superior Air Parts' parent company Thielert declared bankruptcy , Superior itself filed for Chapter 11 bankruptcy on 31 December 2008 and laid off many of its staff.

  4. Matheson (compressed gas & equipment) - Wikipedia

    en.wikipedia.org/wiki/Matheson_(compressed_gas...

    In May 2010, MATHESON acquired Western International Gas & Cylinders, Inc. of Texas, USA, [10] the largest acetylene wholesaler in the world, and manufacturer of cylinders, valves, and related handling equipment. On July 1, 2010, Matheson Tri-Gas, Inc. changed its logo and public name to "MATHESON."

  5. Revolving cylinder engine - Wikipedia

    en.wikipedia.org/wiki/Revolving_Cylinder_Engine

    Most revolving cylinder, axial piston engine designs utilize a fixed, multi-lobed barrel-type cam and rollers on the pistons to control the reciprocating movement of the pistons. [1] The benefit of this approach, versus a conventional crankshaft -and- connecting-rod mechanism, is that the kinematics of the piston motion can be optimized with ...

  6. O'Neill cylinder - Wikipedia

    en.wikipedia.org/wiki/O'Neill_cylinder

    The Island Three design, better known as the O'Neill cylinder, consists of two counter-rotating cylinders. They are 6.4 km (4 mi) [ 3 ] or 8.0 km (5 mi) [ 4 ] in diameter and are capable of being scaled up to 32.2 km (20 mi) long. [ 7 ]

  7. Cylinder (firearms) - Wikipedia

    en.wikipedia.org/wiki/Cylinder_(firearms)

    At the end of the 20th century, the most widely adopted method of loading and unloading a revolver is the swing-out cylinder, invented by several people in early 1860s, not counting Daniel S. Moore's swinging barrel and cylinder assembly [12] in 1860, [13] amongst them were Charles W. Hopkins in 1862, [14] and Benjamin F. Joslyn in 1863, [15 ...