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For the vehicle design where the vehicle's skin is used as a load-bearing element, see Monocoque. 1921 ABC opposed twin unit construction engine / transmission 1923 BMW R32 unit construction engine / transmission. Unit construction is the design of larger motorcycles where the engine and gearbox components share a single casing.
The length previously required for one web + bearing + web group is now replaced by a single bearing length, also acting as both webs. As this reduced crankshaft length also reduces the spacing between cylinders, it was one factor in encouraging the use of tunnel crankshafts in V engines , where there is more axial distance available between ...
The wet weight of a motorcycle includes, but is not limited to fuel, engine oil, coolant, brake fluid, and battery. There is no global standardized way to test the wet weight of a motorcycle. In the EU, Council Directive 93/93/EEC specifies wet weight as "mass in running order", which includes all equipment normally fitted to a bike such as ...
Motorcycle testing and measurement#Weight To a section : This is a redirect from a topic that does not have its own page to a section of a page on the subject. For redirects to
Nikolai Pavlovich Petrov's method of lubrication analysis, which assumes a concentric shaft and bearing, was the first to explain the phenomenon of bearing friction.This method, which ultimately produces the equation known as Petrov's law (or Petroff's law), is useful because it defines groups of relevant dimensionless parameters, and predicts a fairly accurate coefficient of friction, even ...
Weight transfer is generally of far less practical importance than load transfer, for cars and SUVs at least. For instance in a 0.9g turn, a car with a track of 1650 mm and a CoM height of 550 mm will see a load transfer of 30% of the vehicle weight, that is the outer wheels will see 60% more load than before, and the inners 60% less.
The limited-production De Tomaso Vallelunga mid-engine car prototyped in 1963 used the engine as a stressed member. [ 5 ] In GM's Chevrolet Bolt and Tesla Motors Model S and Roadster electric cars, the battery pack is a stressed member to increase rigidity.
Mean time to first failure – Average service life for non-repairable components; Mean time to repair – Measure of the maintainability of repairable items; Power-on hours – The length of time that electrical power is applied to a device; Reliability engineering – Sub-discipline of systems engineering that emphasizes dependability