Questions tagged [engine-placement]

For questions about the location of engines on an aircraft.

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3
votes
4answers
334 views

Why are overwing engines so rare?

This comment to a question about underwing vs rear-mounted engines notes the existence of a rarely used third option: overwing engines. There seems to be very few planes using those. What are the ...
29
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3answers
7k views

Why do most airliners have underwing engines, while business jets have rear-mounted engines?

Why have modern airliners converged on a configuration with two or occasionally four underwing engines, while modern business jets have converged on a configuration with two or occasionally three rear-...
3
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2answers
135 views

Eviation Alice Powerplant Placement

I saw an article from the BBC about the Eviation Alice this morning that left me puzzled. The design is a tail wheel tri-motor with the power plants located in a pusher configuration at the wing tips ...
5
votes
4answers
314 views

What are the advantages/disadvantages of in-fuselage engines (eg most fighter jets) vs wing/fuselage mounted engines?

Most modern jet fighter designs incorporate their engine(s) within the fuselage, while most other medium/large aircraft mount them either under the wings or on the rear fuselage. What are the ...
5
votes
2answers
895 views

How does having a bigger engine placed slightly more forward and higher impact the plane in pitch?

I'm asking about general aerodynamics for under-wing twin-jets – I'm not after information/speculation on the Max 8 crashes/systems, but I mention the crash below because of what I see as an unclear (...
3
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1answer
417 views

Why aren't there any jets with horizontal-stabilizer-mounted engines?

Looking at the spectrum of where jet aircraft put their engines, there are examples of almost every place that could conceivably used to carry a jet engine: slung under the wings buried inside the ...
2
votes
1answer
104 views

What are the pros/cons of low/forward powerplants on helicopters?

(Original) The double-decker Westland Wessex has a pair of side-by-side Gnome turbines low and forward (blue rectangle above). What are the pros and cons compared to the center-high more typical ...
3
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0answers
173 views

What is advantages of a wing mounted engine in comparison to tail and fuselage mounted engine? [duplicate]

What is advantages and disadvantages of wing mounted, Tail mounted and fuselage mounted engines?
0
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1answer
302 views

How does the propeller position affect the effectiveness of control surfaces?

I've found several questions about differences between pusher and puller aircraft, but the effectiveness of control surfaces was not discussed in any of them. Consider the following three scenarios: ...
25
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2answers
5k views

Are there helicopters with vertically mounted turbines?

On the helicopter representation in this answer, the turbine is horizontal, with gear required to drive the vertical-axis propeller. Are there helicopters where the turbine is vertical and directly ...
2
votes
1answer
1k views

What are the advantages/disadvantages of placing an engine in the tail? [duplicate]

What are the advantages and disadvantages of having an engine in the vertical stabilizer, a la the DC-10, Lockheed TriStar, and 727? It seems that this has gone out of fashion among jetliners. Is ...
4
votes
2answers
402 views

Why the inward engines-placement on the An-124?

I am curious as to why the engines (specifically engines 1 & 4) are positioned far closer to the fuselage on the An-124 compared to a typical 4-engined jet. I am curious as to whether this design ...
7
votes
4answers
3k views

What advantage(s) are there for the HondaJet's engine mount position?

The HondaJet has over wing mounted engines as can be seen here: Image from LuxuryLaunches.com The advantages v drawbacks of the over wing mount have been discussed here and here. The over wing mount ...
13
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4answers
6k views

Why is the F-35 engine nozzle exposed?

I was wondering why the F-35 engine is exposed. The F-22, F-16 and the YF-23 Black Widow have the exhaust nozzles of their engines blended flush with the fuselage. (YF-23 Black Widow) (F-35) The YF-...
38
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5answers
26k views

Why don't passenger aircraft use the trijet configuration anymore?

As a kid I distinctly remember seeing aircraft like the bright blue KLM MD-11 having the prominent third engine on the tail. https://commons.wikimedia.org/wiki/File:KLM_MD_11_AMS.jpg However, I don'...
-3
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1answer
283 views

Would an engine have more thrust if it was mounted on top of the wing? [closed]

NASA actually did studies that say that it does increase the thrust. Air moves faster on top of the wing than the bottom, so could this have an effect on the engine's performance if there is more ...
3
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4answers
5k views

Why are the Boeing 747-8 engines on the wings spread apart? [duplicate]

I ask this because the Boeing 747-236 had the engines close together while the 747's have them spread apart. Does it have anything to do with the amount of thrust of the aircraft? Look at how spread ...
34
votes
4answers
24k views

How does the mounting location of a jet engine affect aircraft performance?

Different jet airplanes mount the engines in different ways. For example: Under the wing To the fuselage How does the engine location affect aircraft performance? Is one better than the other?