Private jets have better power to weight ratio than commercial jets so it is easier to ascend to greater heights. Commercial jets also carry more fuel which needs to be burned off to lighten the plane to go higher.
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All the reasons private jets fly at a higher altitude are for increased safety and to reach their destinations faster.
It can climb directly to an altitude of 37,000 feet in eighteen minutes, then continue to 43,000 feet for a high speed cruise of 488 knots, or climb to 45,000 feet for a long-range cruise of 459 knots. The highest altitude that it is certified to fly at is 51,000 feet.
The biggest reason for flying at higher altitudes lies in fuel efficiency. The thin air creates less drag on the aircraft, which means the plane can use less fuel in order to maintain speed. Less wind resistance, more power, less effort, so to speak.
A major reason for flying at that altitude is money; After labor, fuel is the greatest expense for airlines. That's why airlines are constantly working to maximize their fuel efficiency. Cruising at 36,000 feet helps with that. The higher altitude means thinner air.
Both the Gulfstream G-650 and the Dassault Falcon 7X are capable of speeds of up to 685 mph. A Boeing 747 can reach a cruising speed of about 500 mph, making it far slower than the typical private aircraft. A commercial airliner's cruising speed, on the other hand, may be anywhere from 460 to 575 miles per hour.
The biggest reason for flying at higher altitudes lies in fuel efficiency. The thin air creates less drag on the aircraft, which means the plane can use less fuel in order to maintain speed. Less wind resistance, more power, less effort, so to speak.
Fifty years ago, the federal government banned all civilian supersonic flights over land. The rule prohibits non-military aircraft from flying faster than sound so their resulting sonic booms won't startle the public below or concern them about potential property damage.
Current rules prohibit commercial airplanes from flying at supersonic speeds over land because of the noise levels associated with sonic booms and the negative impacts to humans and animals.
Aerodynamic altitude: If a commercial airliner flies too high, it will encounter less dense air passing over the wings to create lift. This can cause the plane to stall and fall out of control. Depending on the weather conditions and aircraft weight, this can occur anywhere between 40,000 and 45,000 feet.
A higher elevation will require a longer climb, meaning the aircraft will burn more fuel in order to reach its cruising altitude. Additionally, 35,000 feet gives more time for airline crew to address any unexpected mid-flight incidents.