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RCUniverse Glossary





Total Words: 412
Words Found in Search: 42
Viewing Records: 1 - 30
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WordDefinition
SAVS
Stabilized Aerial Video System.


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Added by: Clement7
SAW
Short for "straightaway" on a boat or car course.


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Added by: Ron Olson
Schurnle
An engine design that uses more than one port (or bypass) to supply fuel to the combustion chamber. Most modern engines have schnurle porting.


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Added by: fritzke
Scratch Build
Building an aircraft from plans, using materials of various components, complementing originality & concept, including finishing and research.


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Added by: larrypaul
Servo
A small electrically powered motor encased in plastic or metal (typically plastic) with an arm protruding from the side or top. The servo takes control input from the receiver and is used to translate transmitter control changes into movement of control rods, levers or other mechanical linkages on the radio controlled vehicle or aircraft.


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See also: Battery Eliminator Circuitry (BEC) | Receiver | Servo Reverse Switch | Y-Harness | Servo Saver Added by: mkranitz
Servo Arm
An attachment to the drive gear on a servo to transfer rotational (circular) force to directional (fore and aft) force.


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Added by: Rob40
Servo Reverse Switch
Most transmitters have switches that permit the user to reverse the direction of the servo controlled by the applicable channel reversing switch.


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See also: Servo Added by: mkranitz
Servo Saver
Servo Savers help reduce stress on Servo gears. They are most often used for high-stress areas such as Steering.

They most often have a spring inside the servo horn that improves servo control by eliminating servo saver flex, and it should only typically be used along with a steering servo that has metal gears. One should use caution when being used with plastic-geared servos because the high strength spring inside will strip the gears.


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See also: Servo Added by: avalanche wolf
Settling with Power
This occurs when a helicopter settles in its own downwash. Can be caused by a high vertical rate of descent and low forward airspeed. Pulling in pitch only makes things worse. To get out of it. make a tailrotor turn and get some airspeed. It"s rare in R/C but does happen and can be mistaken for mechanical failure.


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Added by: Cyclic Hardover
Sheeting (wing)
The outer skin of a wing structure. Can be wood (balsa, plywood, obechi), paper or a composite such as kevlar or fiberglass. A sheeted wing may have no structure other than a core and the outer skin.


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See also: Core (wing) Added by: fritzke
Shock Absorber
A device that softens the shock that occurs when a car wheel runs over an obstacle, turns sharply or drops sharply into a rut in the road. Shock absorbers can be made using a coiled spring assembly or by using a piston and oil setup that uses the viscosity of the shock oil to regulate the stiffness of the shock absorber.


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See also: Damping Added by: mkranitz
Short Kit
A partial set of components for a model. It typically includes wing ribs and fuselage formers, and may include formed pieces. It typically does not include sheeting and hardware.


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Added by: fliir
Shot Down
Radio interference causing a crash.


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Added by: deves
Simulator
Software running on a computer that can represent the flying characteristics of a model. This allows beginners to learn and the more experienced to practice without expensive crashes.


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Added by: foxabilo
Single Channel
A type of RC system using only RF carrier or RF carrier modulated with a single tone for control data transmission. The resulting control outputs were typically non-simultaneous and non-proportional.


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See also: Pulse Proportional Added by: grotto2
Skeg
A fin on a boat to aid in getting the boat to track straight. On some hulls such as a cracker box they are mounted on the keel near the center of the boat and they are also made into many of the drive struts


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Added by: superrod
Skids
The section of a helicopter's landing gear that makes contact with the ground. The skids are mounted parallel to the helicopter's fuselage and usually turn up in the front to avoid "stubbing" on heavy takeoffs.


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Added by: deves
Slats
Leading edge devices usually found on airliners and some fighter jets used to increase leading edge area thus increasing total lift. Normally used in conjunction with flaps for takeoff and landing.


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Added by: Sportflyr
Slip
(AKA Side Slip) This is a maneuver where the rudder is moved opposite to the aileron input, which results in a yaw or "Crab". Due to the excessive amount of drag created, a slip is usually performed on final approach to drop altitude without increasing speed.


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Added by: MinnFlyer
Slipper Clutch
Typically found on monster trucks and other offroad vehicles, the slipper clutch regulates how much engine power is transmitted from the drive gears to the wheels. The device is used to maximize a vehicle's traction.


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Added by: mkranitz
Slotted Flap
The concept is similar to that of a split flap, with the difference that the flap actually extends outboard and separates from the wing, leaving a gap or "slot" between the flap leading edge and the wing's trailing edge. This "slot" reduces some of the drag created by the flap, but at the same time increasses lift.


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Added by: FalconWings
Smackdown
From WWF (wrestling) fame. It is a byproduct of a mistake make by one of two pilots hovering in formation when he finds himself in the prop wash of the other plane. The radical loss of thrust can lead to an Aunt Jemima or a compactor.


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See also: Aunt Jemima | Compactor Added by: marcv
Smoke
The process of injecting oil into an aircraft muffler for the purpose of creating a visible white or grey trail. Used for enhancing a demonstration or highlighting a maneuver. Smoke oil can be pumped into the muffler with a pump or with pressurization from an exhaust pressure tap.


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Added by: Rob40
Snap roll
A maneuver where a pilot is going wide open throttle and enters a elevator and aileron controlled roll. The roll is quick and spontaneous and the goal of the maeuver is to make it happen in the blink of an eye.


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Added by: Mr.Extra 260
Snapasaurus
This is a 3D snap entered from high speed with high throttle. Audible ripping of the air by the wings is heard over the engine noise.


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See also: Depth Charge Added by: marcv
SPAD
An acronym for Simple Plastic Airplane Design.

In the most basic design, SPADs are airplanes with corrogated plastic (Coroplast) wings and gutterpipe fuselages. More complicated and unconventional airframes can be made completely of Corrogated plastic. U-channel aluminum fuselages are common.


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See also: Coroplast Added by: casniffer
Spar
The main spanwise structural member(s) of the wing that run from wing tip to wing root. Spars help prevent the wing from overly flexing or failing during flight maneuvers. Wings with solid cores may not have spars.


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Added by: fritzke
Speed Controller
Electronic Speed Control. This device controls the throttle function on electric vehicles and aircraft. Some ESC's come with an automatic shut-off feature that simply shuts the motor down if the voltage in the battery becomes too low. This is done to conserve power for servos that operate the control surfaces (usually on aircraft).


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See also: ESC | Tamiya plug Added by: mkranitz
Split S Turn
Fly straight and level. Throttle to idle, and as you do this roll inverted and as the plane rolls inverted apply up elevator to pull to level in the opposite direction, throttle up.


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Added by: deves
Spoiler
Control surfaces on the wing that destroy lift. They "spoil" it. They are used on sailplanes because they can steepen the very flat glide of the aircraft, which makes landings much easier. On full-size aircraft, spoilers are also used to kill lift on landing to make sure the airplane is firmly on the ground. They also add a lot of drag to help with aerodynamic braking.


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Added by: Rich83
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