Why Are Jet Engines Flat On The Bottom?

Why does the 737 have no landing gear doors

Since the plane was deliberately designed to be low, there wasn’t enough space under the aircraft to accommodate wheel well doors for the main landing gear.

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If the 737 were to be equipped with landing gear bay doors, and they fail to close up before landing, things wouldn’t be good when the plane touches down..

How far can a 737 fly without refueling

Currently, Boeing 737 aircraft is deployed into various routes around the world. The distance covered by the older models is much less than that of the re-engined MAX series, for example. Still, the plane can cover up to 3,600 nautical miles and stay over eight hours in the air.

Why were engines on the back of fighter planes instead of the front

Low wings do not allow the necessary space for engines, so the next best location is on the rear fuselage. Also, small aircraft have a relatively short fuselage, and the gear can be made short (and light) without risking a tail strike on rotation. … The engines are easy to access (if mounted at the rear fuselage.

How many engines does a 737 have

8,000Powering the Boeing 737 Next-Generation family 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.

Why do some planes have 4 engines

Fitting an aircraft with four engines also increases power, enabling more passengers, heavier payloads, and increased performance. This was especially important for early jet airliners, as jet engines at the time produced less thrust.

What is the max speed of a 737

839 km/hBoth the Boeing 737 MAX 8 and Boeing 737 MAX 9 have a maximum cruise speed of 839 km/h (521 mph) and a flight range up to 6,510 km (4,045 mi).

How many 737s have crashed

According to the Aviation Safety Network, the 737-800 involved in Wednesday’s crash was delivered to UIA in July 2016. It is just one of more than 7,000 variants of the 737NG planes to have entered service across 20 years. According to Boeing data, seven of the aircraft have been involved in fatal crashes.

How much does a CFM56 engine cost

CFM International CFM56 (F108)Engine Type:Two-Spool High-Bypass Turbofan EngineApplications:C-40 Clipper; Boeing 737 AEW&C; P-8A Poseidon; KC-135/RC-135; E-6B MercuryStatus:In ProductionManufacturer:General Electric Co. and SafranPrice/Unit Cost:CFM56-2A2: $8.75 million (in 2015)

Who makes the engines for Airbus

The Engine Alliance GP7000 is a turbofan jet engine manufactured by Engine Alliance, a joint venture between General Electric and Pratt & Whitney. It is one of the powerplant options available for the Airbus A380, along with the Rolls-Royce Trent 900.

Why do pusher propellers have low base drag even with high aft fuselage angles

Aerodynamics. A pusher may have a shorter fuselage and hence a reduction in both fuselage wetted area and weight. In contrast to tractor layout, a pusher propeller at the end of the fuselage is stabilizing. … Wing profile drag may be reduced due to the absence of prop-wash over any section of the wing.

How old is a Boeing 737

Technical SpecificationsFirst flightApril 9, 1967Model number737-100/-200ClassificationCommercial transportSpan93 feetLength93 feet 9 inches6 more rows

What plane has an engine in the tail

Most smaller aircraft, like the Hawker Siddeley Trident, the Boeing 727 and the Tupolev Tu-154 have two side-mount engine pylons in a T-tail configuration. The larger widebody Lockheed TriStar and DC-10/MD-11 mount an engine underneath each wing.

What is hanging off the tail of the 737 Max

Video – This strange shuttlecock hanging off the tail… It is in fact, the “Trailing Cone”. … To measure the static pressure, commercial aircraft are in fact fitted with sensors on the fuselage; sensors that are therefore subject to disturbed air-flow and thus giving inaccurate data.

Why are Boeing 737 engines flat at the bottom

When the plane debuted, the Boeing 737 had rounded engines. But in 1985, Boeing decided to redesign the 737 to fit more passengers. … The flattening of the engine’s nacelle provided extra clearance from the ground. Of course, the engine itself is not flat, it is circular because the fan is circular.

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.

Why do some planes have 3 engines

This was because three-engined aircraft were more fuel-efficient. Indeed, three-engined widebodies were seen as the ‘sweet-spot’ between twin and quad-jet aircraft, having better range, payload capabilities, and capacity than twin-jets, without the excessive fuel consumption of quad-jets.

What does CFM56 stand for

product lineCFM is not an acronym, so it doesn’t stand for anything. The company (CFM), and product line (CFM56), got their names by a combination of the two parent companies’ commercial engine designations: GE’s CF6 and Snecma’s M56.

Why are jet engines under the wing

Placing engines on the wing provides beneficial wing bending relief in flight. The further the engines are away from the fuselage the greater the wing bending relief so engines buried in the wing root provide little relief.

Why is the front of a jet engine never painted

Mainly, it’s about heat. Or, really, heat as it applies to safety. Ice forming on the front of jet wings and their engines is a real risk when flying through cold clouds, so jets have the ability to redirect some hot air they’re already generating to this front ring to keep it hot and prevent ice from forming.

Which planes use Rolls Royce engines

ApplicationsAirbus A330.Airbus A330neo.Airbus A340 (-500 and -600 series only)Airbus A350.Airbus A380.Boeing 777 (-200, -200ER and -300 series only)Boeing 787 Dreamliner.

How far can a 737 fly

3,850 nautical milesHow far are you going? That’s another way you can tell that you’re on a 737 MAX. This aircraft sets new standards in fuel efficiency and performance, increasing its range by 19 percent to over 3,850 nautical miles.