Questions tagged [engine-placement]

For questions about the location of engines on an aircraft.

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optimal airplane propeller placement along the vertical axis?

is there a guideline for optimizing flight based on where the engine/propeller is placed along the vertical axis? some planes have the propellers well below the wings, some on the wings, some above ...
stuart's user avatar
  • 125
0 votes
0 answers
61 views

Which would be the best placement of an engine for a supersonic buisness jet that has an intake of 2-D ramp? [duplicate]

I would also like to know if possible which would be the advantage/disadvantage of placing the engine under or over the wing for example.
AlejandroArias's user avatar
10 votes
6 answers
7k views

Is everything OK with engine placement depicted in Flight Simulator poster?

Does the Airbus A320neo depicted in Microsoft Flight Simulator 2020 box cover photo has the right engine in all the wrong place? Here is the snapshot: Is it only me, who clearly sees that it is way ...
trejder's user avatar
  • 4,162
15 votes
2 answers
2k views

Are the A380 engines interchangeable (given they are not all equipped with reverse)?

I have noticed that the A380 only uses the two engines closest to the fuselage to reverse thrust to brake. Are all four engines the same (i.e.: could they theoretically swap engine 1 and engine 2) or ...
Sam Creamer's user avatar
1 vote
3 answers
195 views

Where can I place an engine in a twist morphing wing?

I am designing an electric aircraft with a wing that is completely based on the idea of biomimicry, whereas the wing has multiple winglets and can also morph by twisting. It is more like an experiment ...
Nameera's user avatar
  • 11
8 votes
2 answers
925 views

Why are the B-47’s inboard and outboard engines mounted so differently?

The B-47 has six underwing GE TG-190 engines, two on each inboard pylon and one on each outboard pylon. The inboard engines are mounted on a long pylon that extends well below and forward of the wing,...
Vikki's user avatar
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4 votes
4 answers
986 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 ...
Eth's user avatar
  • 763
30 votes
3 answers
11k 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-...
quiet flyer's user avatar
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4 votes
2 answers
342 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 ...
dlu's user avatar
  • 141
6 votes
4 answers
2k 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 ...
Ketan Rajan Singh's user avatar
7 votes
3 answers
2k 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 (...
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2 votes
1 answer
1k views

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

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 ...
Vikki's user avatar
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2 votes
1 answer
264 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 ...
user avatar
3 votes
0 answers
231 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?
MajidMozafari's user avatar
0 votes
1 answer
659 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: ...
Robe's user avatar
  • 618
26 votes
2 answers
8k 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 ...
Eth's user avatar
  • 763
2 votes
1 answer
3k 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 ...
AllTradesJack's user avatar
4 votes
2 answers
598 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 ...
chickenricekid's user avatar
9 votes
4 answers
5k 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 ...
FreeMan's user avatar
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10 votes
2 answers
6k views

How do you choose engine placement for under wings engines?

I'd like to know how you choose the location of the engines under the wings, in the case of a 4-engines aircraft with low wings (and therefore with engines under the wings). Concerning the ...
tintindu34's user avatar
12 votes
4 answers
8k 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-...
Hyden's user avatar
  • 417
38 votes
6 answers
37k 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'...
codedude's user avatar
  • 986
-3 votes
1 answer
310 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 ...
Ethan's user avatar
  • 9,289
3 votes
4 answers
9k 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 ...
Ethan's user avatar
  • 9,289
59 votes
9 answers
50k views

Why not mount airliner jet engines above the wings?

It seems that most airliners put the engines below the wings, i.e. the Boeing 7*7 series and the Airbus A3** series. This requires long (heavy) landing gear, and the engines are close to the ground ...
dotancohen's user avatar
  • 6,317
33 votes
4 answers
33k 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?
Lnafziger's user avatar
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