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RCUniverse Glossary





Total Words: 412
Words Found in Search: 6
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WordDefinition
Vapor Lock
This occurs when an engine has been running at an excessive heat, normally for 15 minutes or more and the crankcase heat transfers to the carbueretor, boiling fuel before it enters the combustion chamber.


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Added by: NITROHOLICS ANONYMOUS
Variable Propeller
A "Propeller" with blades that can increase or decrease in angle thus changing the amount of momentom for the airplane or boat.


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Added by: cobby1
Vectored Thrust
The ability of an aircraft to direct the thrust from its main engine(s) in a direction other than parallel to the vehicle's longitudinal axis.


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Added by: darenm
Venturi
1. A short tube with a constricted throat used to determine fluid pressures and velocities by measurement of differential pressures generated at the throat as a fluid traverses the tube.

2. A constricted throat in the air passage of a carburetor, causing a reduction in pressure that results in fuel vapor being drawn out of the carburetor bowl.


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Added by: felix.ragav
Vertical Stabilizer
Also known as a vertical fin, this non-moving control surface provides stability about the yaw axis.


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See also: Yaw Axis Added by: mkranitz
Volts
The three most basic units in electricity are voltage (V), current (I) and resistance (r). Voltage is measured in volts, current is measured in amps and resistance is measured in ohms. If we compare an electrical system to a water system, it would shake out like this:

The voltage is equivalent to the water pressure, the resistance is equivalent to the pipe size and the current is equivalent to the rate at which the water is flowing. The relationship between these three can be stated as follows:

I = V/r (Current in Amps is equal to voltage divided by resistance)

So, using our water analogy, let's say you had a power nozzle on your hose. If you open the faucet more, you will increase the pressure in the hose and the water will flow faster. In electrical terms, increasing the pressure is like increasing voltage and the resulting increase in flow is an increase in current.


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See also: mAh Added by: mkranitz
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