That is about 160 mph.
About 170 mph.
For a fairly new helicopter, around 120 knots. Around 150 mph, except for fast military helicopters.
a helicopter that lifts heavy objects
80
150 knots
148knots
575 mph.
That cannot be calculated without knowing the average speed over that distance.
What would you call "average". I don't see there is an "average" helicopter, all are different.
The speed of a commercial jetliner is around 560 miles per hour.
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.
Lynx ZB-500 249.09 mph world record. Fastest helicopter.