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Typical trim tabs on aileron, rudder and elevator. Trim tabs are small surfaces connected to the trailing edge of a larger control surface on a boat or aircraft, used to control the trim of the controls, i.e. to counteract hydro- or aerodynamic forces and stabilise the boat or aircraft in a particular desired attitude without the need for the operator to constantly apply a control force.
This construction is called "The Saye's Rigg". Another version of wind vane self steering on sail boats is known as the vertical axis vane and usually, because of the inferior steering force output compared to servo pendulum devices it makes use of a trim tab hung off the rudder to control the course of the boat. The vane spins at right angles ...
A Piper PA-48 Enforcer, N202PE, c/n PE2-1001, crashed after structural failure due to flutter caused by a Piper-modified elevator trim-tab, off Vero Beach, Florida. [80] Four of the heavily modified, turbine-powered TF-51 derivatives were built for the counter-insurgency role with two tested at Eglin AFB , Florida in 1983–1984, but no orders ...
In these incidents, there was a failure of control system components themselves (e.g. cables, hydraulics, flaps, slats, ailerons, rudder, stabilizer, trim tabs, auto-pilot). (Control system fatigue failures are here, but improperly installed or incorrectly adjusted controls in the next section.) United Airlines Flight 585, Boeing 737, March 3 ...
Ships and boats are usually steered with a rudder. Depending on the size of the vessel, rudders can be manually actuated, or operated using a servomechanism, or a trim tab or servo tab system. Rowing may be used to steer rowboats by using specific paddle strokes. Boats using outboard motors steer by rotating the
Most fixed-wing aircraft have a trimming control surface on the elevator, but larger aircraft also have a trim control for the rudder, and another for the ailerons. The rudder trim is to counter any asymmetric thrust from the engines. Aileron trim is to counter the effects of the centre of gravity being displaced from the aircraft centerline ...
As one post on the Movie Mistakes site points out, “Suddenly adding about 200kg to a Huey in flight like that is going to cause all sorts of problems with the trim and airspeed of the aircraft ...
The NTSB critically investigated the incident and found that the plane was traveling about 445 knots (510 mph; 825 km/h) when it experienced a left roll upset at 17.3 Gs and a section of the left elevator trim tab separated in flight. Deteriorated locknut inserts allowed trim tab attachment screws to become loose, ultimately leading to ...
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