An airplane cruising


Several factors explain why planes fly at 35,000 feet. This article will focus on four key reasons specific to commercial aircraft, excluding private and military planes.
Cruising altitude, whether 30,000, 35,000, or 40,000 feet, depends on the aircraft’s design, purpose, engine type, and fuel efficiency. Long-haul flights typically cruise between 35,000 and 42,000 feet, a range more common for private or corporate jets.
For long-haul flights, cruising at 35,000 feet and above provides the pilot and passengers with a sense of safety based on weather conditions. For instance, if there is unsuitable weather that may affect the plane, the pilot can climb higher to avoid the issues to a large extent.
Another reason why this happens is that the air is thinner and clearer at 35,000 feet or more; as such, it becomes easier, smoother and better for an airline to cruise (if it is on a long-haul flight). At this height, the plane faces less air resistance, drag, and turbulence, which means it flies at a faster rate and burns less fuel.
However, listed below are the four 4 reasons why planes will continue to fly at 35,000 feet;

1. Weather Turbulence

Most planes fly at 35,000 feet so as to avoid weather situations that may prove dangerous for the aircraft. At this height, the plane will be flying at stratosphere, meaning it will be above the atmosphere where most of the cloudy conditions occur.
At this level, the aircraft will safely fly to its destination without the fear of encountering unfavourable weather conditions.

2. Optimised Performance of the Engine

At this height, the plane's engine works with ease because there is lesser drag on the aircraft itself to operate. However, the aircraft's engine needs air to operate, but at that height, there is cold, and this cools the engine, and should there be an engine problem, it does not immediately affect the aircraft, as it will give the pilot enough time to source a solution to the problem.

3. Air Traffic

There is a lot of traffic in the air. Most people do not know that planes also avoid traffic just like cars do on land. At 35,000 feet, only a few planes are seen, and these are either larger planes or private planes with the capacity to fly at a higher level (preferably 42,000 feet). Smaller planes fly at most 30,000 feet or less, where there is a struggle for air traffic space.
However, there is a limit to how high a (commercial) plane can go. A plane should not go beyond the ceiling level, which is 45,000 feet.

4. Fuel Efficiency (and lesser drag)

At 35,000 feet, the plane flies smoothly and uses less fuel in its operation, operating without pressure. At this level, the plane flies faster than it should and moves through the thin air without being dragged.
Pilots usually inform the passengers about reaching the cruising level of 35,000 and urge them to move around the cabin (but with caution). In some cases, passengers are advised to consider than safety first before helping others, especially if they get to an altitude where the air is thin, and there is lesser oxygen.
When it comes to air traffic, no country beats the United States, the US air space is highly crowded with planes, and this led to the air authorities to enact a law that determines how airlines are to fly; some fly at 36,000 feet while others fly at 35,000 feet and it depends on the side of the country you are flying from and to.