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A vehicle can perform controlled descent using the anti-lock braking system (ABS) and in some cases engine braking. [1] [2] If a vehicle accelerates under the force of gravity, the system will automatically apply brakes to slow down to the desired vehicle speed. Cruise control buttons can adjust the speed on some vehicles. [2]
To increase or decrease overall lift requires that the controls alter the angle of attack for all blades collectively by equal amounts at the same time, resulting in ascent, descent, acceleration and deceleration. A typical helicopter has three flight control inputs: the cyclic stick, the collective lever, and the anti-torque pedals. [2]
Descend at 2,500–3,000 ft/min (760–910 m/min). RA: Reduce climb. Intruder is probably well below. Climb at a slower rate. RA: Reduce descent. Intruder is probably well above. Descend at a slower rate. RA: Climb; climb now. Intruder that was passing above, will now pass below. Change from a descent to a climb. RA: Descend; descend now.
The Lockheed Tristar was fitted with a system called Direct Lift Control that used the spoilers on landing approach to control descent. Airbus aircraft with fly-by-wire control utilise wide-span spoilers for descent control, spoilerons, gust alleviation, and lift dumpers. Especially on landing approach, the full width of spoilers can be seen ...
In aeronautics, a descent is any time period during air travel where an aircraft decreases altitude, and is the opposite of an ascent or climb.. Descents are part of normal procedures, but also occur during emergencies, such as rapid or explosive decompression, forcing an emergency descent to below 3,000 m (10,000 ft) and preferably below 2,400 m (8,000 ft), respectively the maximum temporary ...
The procedures vary depending on whether the diver is using scuba or surface supplied equipment. Scuba divers control their own descent and ascent rate, while surface supplied divers may control their own ascents and descents, or be lowered and lifted by the surface team, either by their umbilical, or on a diving stage, or in a diving bell.
A control system includes control surfaces which, when deflected, generate a moment (or couple from ailerons) about the cg which rotates the aircraft in pitch, roll, and yaw. For example, a pitching moment comes from a force applied at a distance forward or aft of the cg, causing the aircraft to pitch up or down.
Hill descent control helps drivers maintain a safe speed when driving down a hill or other decline. [40] These systems are typically enacted if the vehicle moves faster than 15 to 20 mph when driving down. When a change in grade is sensed, hill descent control automates the driver's speed to descend down the steep grade safely. [40]