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RCUniverse Glossary





Total Words: 412
Words Found in Search: 12
Viewing Records: 1 - 12
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WordDefinition
1/2 A
A glow engine size class with cylinder displacement of .050 cubic inches and less.


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Added by: fritzke
2 stroke
“2 Stroke” is short for “two-stroke cycle,” which refers to a type of engine used on model airplanes, leaf blowers and other machines. The two strokes are the downward and upward motions of the piston inside the cylinder. The downward stroke causes pressure in the crankcase, which forces fuel/air mixture up a passage to an opening in the cylinder, where it also assists the spent fuel to exit the exhaust opening. The upward stroke causes the piston to cover the exhaust and bypass openings, and pressure is reduced in the crankcase. This causes a new charge of fuel/air mixture to be drawn in through the carburetor, while pressure is increased in the cylinder until the compressed fuel/air mixture is ignited by the glow plug. Pressure from the burning fuel then drives the piston downward to begin the next cycle. Note that two-stroke engines “fire” each time the piston reaches the top. (See 4 Stroke)


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See also: 4 Stroke Added by: twostroke
2/3 AA
A type of battery found in many park flyers and also in some 1/18th scale buggies/trucks. The cells are about 2.8cm length and 1.8 wide

They range from 300mah to 1400mah and voltages of 7.2 volt to 10.8 volt


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Added by: E-SKY_FLYER
27 MHz
A frequency reserved for general commercial use. Often used in toys and other consumer electronics that transmit data wirelessly. Because of this, it is easier to get interference with your radio system while using this band. Often toy grade r/c equipment using this band will not mark which channel it is operating on, making it harder to use multiple toys at the same time.


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Added by: pace_likethesalsa
3D
Flying beyond the stall!!!

Example Maneuvers: Prop Hang Torque Roll Harrier (inverted, upright, rolling and other combos) Elevator (as above) Blender Waterfall and more...


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See also: Harrier | Torque Roll Added by: Ian.W
4 Stroke
“4 Stroke” is short for “four-stroke cycle,” which refers to a type of engine used on model airplanes, automobiles and other machines. The four strokes are two downward and two upward motions of the piston(s) inside the cylinder(s). The first (downward) stroke is called “intake,” which reduces pressure in the cylinder. With the intake valve open, this draws fuel/air mixture into the cylinder from the carburetor. The second (upward) stroke is called “compression,” and with both valves closed the fuel/air mixture is compressed until it is ignited by a glow plug or spark plug. The third (downward) stroke is called “power,” where the pressure from the burning fuel drives the piston downward. The fourth (upward) stroke is called “exhaust,” and with the exhaust valve open the piston forces the spent fuel out the exhaust pipe. Note that four-stroke engines “fire” every-other time the piston reaches the top. (See 2 Stroke)


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See also: 2 stroke Added by: Ralph Morris
4 Wheel Drive
4 Wheel Drive is when all four wheels are powered by the engine/motor through a drivetrain. The use of four wheel drive allows a buggy, monster truck or car to obtain better traction.


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Added by: Ryan_rammstien
4-link
a form of truck suspension that houses a straight axle mounted by 4 links to the truck and a shock to the top. Used in rock crawling or accuracy in building a custom truck.


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Added by: chadchm8
4D
Power system capable of reverse thrust.


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Added by: mrblucor
50-Grit Pass
A knife edge or inverted pass low enough to leave some monokote, balsa and foam on an asphalt runway. On a grass runway this is also known as a 'Cartwheel'.


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See also: Yard sale Added by: marcv
72 Mhz
FM Frequency band reserved for general air vehicles (planes, helicopters, etc.). Often used in remote control vehicles with dedicated receiver and transmitter with interchangeable crystals. Channels 11-60 are available channels in this band.


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Added by: Primodus
75 MHz
FM Frequency band reserved for general ground vehicles (cars, boats etc.). Often used in remote control vehicles with dedicated receiver and transmitter with interchangeable crystals. Channels 61-90 are available channels in this band.


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See also: TX Added by: heavyaslead
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