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Model Engineering Glossary


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Vapour Carburettor

Consists of a container of fuel (roughly half full), air is sucked in at one end at the top and out at the other end at the top - as the air is drawn in through the top it impinges on the surface of the fuel which has a tendency to splash the fuel around and so increase the surface area. The fuel vapourises and this gets mixed with the air. The result is a fuel air mixture that is drawn into the engine.


Vernier Caliper

Vernier Caliper The vernier caliper is a useful addition to any model makers set of tools as it is easy to use and provides inner, outer and depth gauge all in one. If you don't know how to read a vernier scale it is explained in simple terms here (just click on Vernier Caliper in the above heading). more......

See also: Micrometer.


Vicker's Hardness

Determined by indenting the material with a diamond pyramid under a specific load and then measuring the size of the impression.


Volume

See also: Conversion of Units, Sphere.


Volumetric Efficiency

The components of the air intake system restrict the amount of air that can be drawn into an engine. It can only be used with four-stroke engines as they have a distinct induction process. It is defined as the volume flow rate of air into the intake system divided by the rate at which volume is displaced by the piston.


V-Twin Engines

A 2 cylinder engine configuration with the cylinders arranged around the crankshaft such that when you look along the line of the crankshaft they form a "V".


A B C D E F G H I J K L M N O P Q R S T U V W X Y Z