Why are some jet engines flat on the bottom?

Subsequently, the engines on future 737s were flattened along the bottom. This allowed them to contain a larger fan and turbine without compromising on ground clearance. The solution was not perfect, as it did have certain negative aerodynamic properties, causing more drag than a round engine.

Why are Boeing engines flat?

But when the aircraft was stretched it changed the center of gravity and reduced the ground clearance. In order to resolve the problem of the new center of gravity, Boeing redesigned the engine pylons. The flattening of the engine's nacelle provided extra clearance from the ground.

Why do some jets have engines on the tail?

Positioning the engines on the tail also made a jet easier to control in the event of an engine failure, as the thrust line of both engines was then closer to the centerline of the airplane. Such a unique design was not without drawbacks.

Why don't they put screens in front of jet engines?

The extra weight of a screen would decrease fuel efficiency. But the main reason is concern that screens would impede airflow into engines, possible causing an engine to shut down. Screens could ice over — airliners typically cruise at altitudes where temperatures are well below zero. Ice would also disrupt airflow.

How do jet engines deal with rain?

As the incoming air moves into the rotating fan blades, the spinning motion flings the heavier water outward like a centrifuge. The water is then blown through the bypass air ducts that surround the engine core. In this way, the water is carried through the engine without ever entering the combustion chamber.

Why Are The Bottom Of Boeing 737 Engines Flat?

Why can't turboprop fly at high altitudes?

A turboprop is a constant pressure engine, so as you climb, you kinda need to go faster and faster, but basically you still burn the same amount of air/fuel. You will lose power as you climb in a turboprop, but that's mostly cause the propeller loses efficiency at the higher speeds you fly higher up.

Why is there a spiral on jet engines?

The primary function of the spiral is to warn the ground crew working around the aircraft that the engine is on and to ensure nobody comes up too close to the running engine.

What happens if a bird gets sucked into a jet engine?

When a bird flies, or is sucked into, the engine of a plane, the poor critter usually disintegrates. However, in incidents with larger birds there can be extensive damage to the engine. “Losing one engine is not going to cause an aircraft to crash because they are designed to fly with one engine down,” said Landells.

Can a bird destroy a jet engine?

When a bird hits one of those fan blades, there's a tremendous energy transfer from the bird to the engine, and that's basically why a bird can cause serious damage to an aircraft engine. We do know that for this flight today, Canada geese would be the most likely species.

Can a 4 engine plane fly with one engine?

Can a plane fly with one engine? Most commercial airplanes have two engines, but they are designed to be able to fly almost exactly the same if one fails. So if an engine fails mid-flight, a pilot should have little to no problems getting the plane to land safely with only one engine.

Can a DC 10 fly on one engine?

Airliners can fly with one engine out, but there is concern with the DC-10 that failure of any engine which involves it coming apart endangers the hydraulic system.

Why do private jets have engines at the back?

Thrust Control: Engines close together at the rear means that if you lose an engine, you don't have to fight the force of having a lot of thrust on one side and none on the other.

Why is the 737 so low?

The 737 was originally designed to be a smaller aircraft serving more regional routes. The original JT8D low-bypass turbofans easily fit under the wings, and allowing the plane to sit lower to the ground made it easier for the plane to operate at smaller airports without support equipment.

What engine does a 737 use?

The CFM56-7B is the exclusive engine for the Boeing Next-Generation single-aisle airliner. In total, over 8,000 CFM56-7B engines are in service on 737 aircraft, making it the most popular engine-aircraft combination in commercial aviation.

How many engines are on a 737?

The Boeing 737 Next Generation, commonly abbreviated as 737NG, or 737 Next Gen, is a narrow-body aircraft powered by two jet engines and produced by Boeing Commercial Airplanes.

How high does a jet fly?

The highest that a business jet can fly is 51,000 feet. The highest that a commercial airplane can fly is 45,000 feet. Most military planes fly at around 50,000 feet and sometimes higher. Some rocket-powered planes can fly as high as 100,000 feet but they are specially designed for this purpose.

How do pilots avoid birds?

Birds don't fly at night. Birds don't fly in poor visibility, such as in clouds, fog, rain, or snow. Birds can detect airplane landing lights and weather radar and avoid the airplane. Airplane colors and jet engine spinner markings help to repel birds.

How many planes have birds brought down?

Nearly 500 planes have been damaged by collisions with birds since 2000, according to the Federal Aviation Administration. Some 166 of those planes had to make emergency landings.

Do jet engines go in reverse when landing?

The engine is not really reversed. While reverse thrust does cause some stress on the engine and pylon, they are designed for it. Q: When the plane lands, you can hear the engines being used to decelerate.

Which way do jet engines rotate?

On most twin or multi-engine propeller driven aircraft, the propellers all turn in the same direction, usually clockwise when viewed from the rear of the aircraft. In a counter-rotating installation, the propellers on the right wing turn counter-clockwise while those on the left wing turn clockwise.

What is a graveyard stall?

In aviation, a graveyard spiral is a type of dangerous spiral dive entered into accidentally by a pilot who is not trained or not proficient in flying in instrument meteorological conditions (IMC).

What is the highest a prop plane can fly?

Are turboprops safer than jets?

Turboprop vs Jet Safety

Both turboprops and jets are powered by turbine engines, so they are essentially the same thing and thus, are considered to be equally as safe.

At what height do propellers stop working?

Most commercial jetliners have a service (or certificated) ceiling of about 42,000 feet and some business jets about 51,000 feet. Many military jets are able to fly substanitally higher but it is classified. The SR71 in 1976 published a world record 85,135 feet, however I'm sure they and some others can go higher.