# Question: Why Can’T Helicopters Fly At High Altitude?

## How cold is it at 35000 feet?

How cold is it up there.

The higher you get, the colder it gets, up until 40,000 feet.

If the temperature at ground level was 20C, at 40,000 feet it would be -57C.

At 35,000 feet the air temperature is about -54C..

## Can you fly a helicopter to the top of Mount Everest?

Helicopters can fly higher than the summit of Everest but landing to take on a passenger or body is dangerous.

## Why are helicopters not supposed to fly?

Helicopters should be forced to fly, while the airplanes want to fly. Helicopters are inherently unstable and pilots have to work their arse off to try to make it stable. If you trim an airplane properly it will maintain the desired speed and altitude with you doing very little.

## How far can a helicopter fly in 2 hours?

As a general rule, helicopters usually fly around 2.5 to 5 hours before they have to stop and refuel. This translates to a distance of roughly 250 miles, which means that they can fly a lot farther than many people realize before they have to stop.

## What does it mean when a helicopter is circling your neighborhood?

Usually out here when a chopper is circling around it usually means that there is either a fire, robbery or a traffic accident somewhere in the area.

## What happens if a helicopter flies too high?

Going higher also means increasing the angle of attack on all of the blades (“collective pitch”) to keep generating the same amount of lift as the air gets thinner. This means that the rotor system will become progressively less efficient. At the same time, the “stall speed” of the blades will increase.

## Why do planes fly at 38000 feet?

Commercial aircraft typically fly between 31,000 and 38,000 feet — about 5.9 to 7.2 miles — high and usually reach their cruising altitudes in the first 10 minutes of a flight, according to Beckman. … Another reason why planes don’t fly higher is due to the weight of the aircraft.

## What is the safest aircraft?

These models currently have a clean flight record and all tie for being the safest airplane:Airbus: A220, A319neo, A320neo, A321neo, A340, A350 and A380.Boeing: 717, 747-8 and 787.Embraer: 135, 140 and 145.

## What is safer a plane or a helicopter?

Commercial plane travel is extremely safe, despite recent catastrophes like the Boeing 737 Max crashes; in many years the fatal accident rate in the U.S. is zero. Helicopters are more dangerous, according to data from the federal government, with a fatal accident rate of 0.72 per 100,000 flight hours in 2018.

## Do Planes fly over Mount Everest?

Airplanes often avoid air paths that take them over Mt Everest or the Pacific Ocean. … This is because “the Himalayas have mountains higher than 20,000 feet, including Mt Everest standing at 29,035 feet. However, most commercial airplanes can fly at 30,000 feet.”

## Is there oxygen at 35000 feet?

Planes have lower oxygen levels If this didn’t happen, everyone inside the plane would die, as the low air pressure at the elevations planes fly (typically 35,000 feet or so) means there isn’t enough oxygen present for your body to function.

## How high the helicopter can fly?

Turbine-engined helicopters can reach around 25,000 feet. But the maximum height at which a helicopter can hover is much lower – a high performance helicopter like the Agusta A109E can hover at 10,400 feet.

## Why do aircraft fly at 35000 feet?

The “sweet spot” of flying is regarded as between 35,000 and 42,000 feet – too high and the oxygen becomes too sparse to fuel the engines, too low and the air resistance is greater. This optimum height is linked to the usual weight of a commercial jet – that is, heavier planes fly lower, and lighter higher.

## Can a helicopter fly across the ocean?

Two Ohioans made the first successful crossing of the Atlantic Ocean in a helicopter. … The pair successfully flew across the Atlantic Ocean, landing in Prestwick Scotland. The flight covered 3,535 miles and took forty-two hours, twenty-five minutes to complete.

## Which is harder to fly a plane or helicopter?

Is flying a helicopter more dangerous than an airplane? Since helicopters are generally harder to fly than airplanes, they also are more dangerous to fly. … Helicopters crash about 35 percent more often per hour in the air than your average aircraft.