Sunday, April 13, 2014 at 6:45PM. Generations of southerners have welcomed Chinese snowball viburnum, Viburnum macrocephalum 'Sterile', into their gardens. With multitudes of flower clusters up to eight inches across, this classic shrub is a thing of beauty when it blooms.
Stroke refers to how the pistons move in the cylinder(s). The basic meaning is the length of the piston travel. Short stroke engines can turn over faster, but long stroke engi â¦ nes tend to have more pulling power. Stroke can also be used as 2-stroke and 4-stroke, which refers to the different work phases of the engine.
Stroke is linear/reciprocating motion converted into rotary motion by a (4-bar) chain. Power stroke pushes piston away from TDC whence there can be utmost one of it per revolution, as in a 2-stroke engine ( or 4-stroke double acting). In the case of 4-stroke engine - one power stroke plus one for suction - requires 2 revolutions to a cycle - i.e. 1 power stroke in 2 revolutions. Rather elementary.