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Results tagged with turbofan
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user 15637
A type of jet engine which uses two different airflow streams (one passing through the core and another blown past it by a fan) for obtaining thrust.
0
votes
Turbofan ‐ turboprop/shaft hybrid?
A turbofan engine does not necessarily create more thrust than a turbojet, it’s just more efficient at high subsonic and transonic speeds. … Probably a better way to view a turbofan engine (or at least high bypass turbofans) is that it’s a gas turbine-powered ducted fan, operating on the same principles as the ducted fan engines that you find …
- 75k
-2
votes
Which engine type requires the shortest take-off run: a turboprop or a turbofan?
For two identical airframes, one turbofan powered and the other powered by prop jets, it's going to be a matter of the total available thrust from each as we as the thrust to weight ratio of each engine …
- 75k
5
votes
Why do we refer to "power" for turboprop engines and "thrust" for turbojet/fan engines?
The real reason is that, by definition, a jet engine does not output any kind of power but outputs the thrust force instead. Turbopropeller engines do not output a thrust force but rather output a m …
- 75k
2
votes
Why wasn't the 737 MAX's landing gear lengthened enough to mount the engines under the wings...
The technical answers above are fairly good, but probably the biggest answer is that Boeing corporate out in Chicago was simply too miserly to invest in a clean sheet airplane (which it could have EAS …
- 75k
11
votes
Can electricity be harvested from magnets in jet engines?
Another case of yes, but why would you want to? The starter generator assemblies on most jet engines does the same thing at far less weight and complexity.
- 75k
10
votes
Is it possible to have an afterburner in a turbofan with bypass ratio greater than 1:1?
Can you add reheat to a high bypass turbofan engine? Sure. The real question is what is the purpose for doing so?
The bypass ratio of a turbofan is based largely on its operation regime. … As a result, while it is technically feasible to build a high bypass turbofan with reheat, there is no practical application for it. …
- 75k
10
votes
Why do Western fighters' afterburner glow is reddish orange while Eastern Bloc fighters' is ...
It all depends. I don’t think there’s a distinctive color between the two. I would submit that the photos of the Flanker may be in a early stage of the afterburners lighting versus the photos of the …
- 75k
2
votes
Why do turbofans go faster than turboprops?
Propellers can move a great volume of air at slow speeds but accelerate the gas to a lower exit speed than does a turbojet or a turbofan. … This trend continues through low bypass turbofan engines, turbojets and then ramjets.
And as pointed out turboprops have a beta and reverse pitch range which can produce reverse thrust. …
- 75k
1
vote
Could a F-22's exhaust stall a highjacked Boeing 767's turbofan(s) and force it to land?
Most likely, the answer is no
As pointed out above, jet engines burn quite lean, so there are still is plenty of oxygen in the exhaust gases available for combustion. So much so that during the 1950s …
- 75k
6
votes
What is the operating temperature of a turbofan engine, and how is it kept at that temperature?
Yes, if you could increase the combustion temperature in the hot section of a gas turbine, you could dramatically increase the efficiency of the engine. The problem of course is finding materials whi …
- 75k