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Q: Why PW4000 turbofan engines are smokey?
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What type of engines does a Boeing 747-400 have?

The Boeing 747-400 series have a PW4000 turbofan engine aircraft. Each 747 carries 4 of them; 2 on each wing.


What type of starting system in high bypass turbofan engine?

High Bypass turbofan engines use pneumatics (air) for starting the engines.


Are there spark plugs in turbofan engines?

No. There are not "spark plugs" on turbofan engines. There are ignitors, which help to ignite the fuel during start, but unlike spark plugs, ignitors do not run constantly.


How many engines does a B 52 bomber have?

A B-52 has 8 TF33-P-3 turbofan engines


How many engines are there on an Airbus a330?

The Airbus A330 has 2 engines, 1 on each wing. These engines can be: General Electric CF6, Pratt & Whitney PW4000, and Rolls-Royce Trent 700.


How is an Airbus propelled?

Airbus airliners use high bypass turbofan jet engines.


What Model enegine does an A-10 have?

It has two General Electric TF34-GE-100A turbofan engines.


What are three major types of jet engines?

Turbojet, turbofan and turboprop. Also, turboshaft and ramjet.


Is a embraer rj145 a prop or jet engines?

I think they are jet aircraft although they have turbofan engines. You can check more on thee link below


What is used to speed gas through gas pipelines?

Gas Tubines/ Jet (Turbofan) Engines used as compressors.


What has the author Ronald H Soeder written?

Ronald H Soeder has written: 'Effect of combined pressure and temperature distortion orientation on high-bypass-ratio turbofan engine stability' -- subject(s): Airplanes, Turbofan engines


Which engine is more efficient in jet engines. Turbo jet or the Turbo fan?

The term "Turbofan" is actually quite broad, but can be broken down into two categories…high and low bypass. The question you are really trying to ask is which engine type (high bypass or low bypass) turbofan engine is more efficient? High bypass engines are used on most commercial airplanes (except the Concord) and these engines are favorable because they have a balance of high thrust, and efficiency. Aircraft that need supersonic capabilities (like the Concord) use a low bypass turbofan engine. These engines produce the thrust required to propel a plane beyond the speed of sound, but at the cost of efficiency. They burn a lot of fuel in doing so. So one could draw the conclusion that high bypass turbofan engines are more efficient, but this would not be true. In order to propel a plane beyond the speed of sound the low bypass turbofan engine is the most efficient way of doing so. On the flipside, the high bypass turbofan engine is most efficient for practical air travel. Both engine types are very different, but each are specialized to achieve different goals.