(automotive) A four-stroke twin-cylinder engine with an altered firing order designed to give power pulses similar to a single-cylinder four-stroke engine.
welting
welting
noun
The act of making reinforcing welts.
verb
present participle of welt
winglet
winglet
noun
(aeronautics) A winglike structure at a wingtip set at an angle to the plane of the wing designed to reduce drag by its effect on wingtip vortices.