Their maximum speed is listed as 315 km/h.
Retreating blade stall.
Most helicopters fly at about 170 knots, but some are faster.
No, a Cobra helicopter cannot break the sound barrier. The maximum speed of a Cobra helicopter is around 185-190 mph, which is significantly lower than the speed of sound (about 767 mph at sea level).
Not all army helicopters have the same weight. The Sikorsky UH-60 Blackhawk helicopter weighs 13,648 pounds when empty. This helicopter has a maximum speed of 173 miles per hour.
That depends on type of helicopter
When an object is dropped from a helicopter, it will fall due to gravity. Its speed and direction will be influenced by air resistance and any wind present. The object will accelerate until it reaches its terminal velocity, which is the maximum speed at which the air resistance equals the force of gravity.
The weight of the helicopter affects the terminal speed by influencing the rate at which the helicopter falls. A heavier helicopter will reach a higher terminal velocity compared to a lighter helicopter, as the force of gravity will be greater on the heavier helicopter, causing it to accelerate faster. Additionally, a heavier helicopter may require more lift to counteract its weight, which can also impact its terminal speed.
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There are many different helicopter engines, most of them now jets
Cruising speed is about 150 mph.
About 170 mph.
The helicopter begins to fall because gravity is pulling its weight. As the helicopter accelerates, the air passing past the helicopter creates drag, as the helicopter continues to accelerate the drag Increases until the drag becomes equal to the weight, stopping it from accelerating. Even if the helicopter did not auto rotate it would still reach a terminal speed, however the terminal speed for the non auto rotating helicopter would be a lot higher and the helicopter would take longer to reach this speed.