What would you call "average". I don't see there is an "average" helicopter, all are different.
That cannot be calculated without knowing the average speed over that distance.
About 170 mph.
No. The submarine came about long before the helicopter.
That is about 160 mph.
I doubt that any helicopter can fly from Antarctica to Australia.
A helicopter should be a be able to hover as long as it has fuel to. And the current atmospheric conditions and pilot fatigue levels permit.
47 feet
It hovers as long as the fuel tank lasts.
For a fairly new helicopter, around 120 knots. Around 150 mph, except for fast military helicopters.
$89,874 according to Salary.com
An average remote controlled helicopter has a range of 500 meters. This however can be boosted by some technical know-how to up to 2 miles if you wanted to.
till it runs out of gas