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Torque effect is an effect experienced in helicopters and single propeller-powered aircraft is an example of Isaac Newton's third law of motion, that "for every action, there is an equal and opposite reaction." In helicopters, the torque effect causes the main rotor to turn the
Loss of tail-rotor effectiveness (LTE) [1] occurs when the tail rotor of a helicopter is exposed to wind forces that prevent it from carrying out its function—that of cancelling the torque of the engine and transmission. Any low-airspeed high-power environment provides an opportunity for it to occur.
Another way to eliminate the effect of torque created by the rotorwing is by mounting the engine on the tips of the rotorwing rather than inside the helicopter itself; this is called a tip jet. One example of a helicopter using such a system is the NHI H-3 Kolibrie , which had a ramjet on each of the two wingtips, and an auxiliary power unit to ...
Keen to ensure the best outcomes for their children, helicopter parents tend to hover over their kids, constantly trying to prevent misadventure or harm. But child experts say this can lead to a ...
Flicker vertigo, sometimes called the Bucha effect, is "an imbalance in brain-cell activity caused by exposure to low-frequency flickering (or flashing) of a relatively bright light." [ 1 ] It is a disorientation -, vertigo -, and nausea -inducing effect of a strobe light flashing at 1 Hz to 20 Hz, approximately the frequency of human brainwaves .
The tail rotor pushes or pulls against the tail to counter the torque effect, and this has become the most common configuration for helicopter design, usually at the end of a tail boom. [citation needed] Some helicopters use other anti-torque controls instead of the tail rotor, such as the ducted fan (called Fenestron or FANTAIL) and NOTAR.
This can damage the rotors and presents serious and costly maintenance problems. [46] Abrasion strips on helicopter rotor blades are made of metal, often titanium or nickel, which are very hard, but less hard than sand. When a helicopter flies low to the ground in desert environments, sand striking the rotor blade can cause erosion.
A childhood acquired brain injury can have a huge variety of effects on the child, at different times during the development of their brain function. Depending on how well informed another person is about the injury and about the nature of brain development , it can often be easy to ascribe aspects of a child's behaviour (or 'presentation') to ...