Linked Questions

4
votes
2answers
3k views

Why don't turboprop planes have push engines that use thrust more effectively? [duplicate]

The Piaggo P-180 is one of the fastest private planes out there and uses the push system.
5
votes
2answers
678 views

What are the factors considered while placing a propeller on a plane? [duplicate]

I have read the post where it describes about the push and pull configurations of the engine, advantages/dis-advantages in them but not the purpose. I have seen images of a figter where the ...
1
vote
0answers
75 views

Would propellers be more efficient if they were mounted at the rear of the aircraft? [duplicate]

The propellers of a front-mounted propeller plane push air back directly on a collision course with the aircraft's body. That results in zero thrust or negative thrust from at least some sections of ...
63
votes
8answers
24k views

Why are military drones shaped so strangely?

Military drones, such as the Predator drone or the Global Hawk, tend to have a weird shape with a whale-like head, and engines concentrated at the back. The wings tend to be of very high aspect ratio, ...
24
votes
9answers
8k views

Has a fixed-wing aircraft ever been built that featured multiple turbines powering a single propeller?

Has a fixed-wing aircraft ever been conceived, prototyped or built that features multiple turbines powering a single propeller? The concept of a twin-engine aircraft with a single propeller is ...
12
votes
4answers
3k views

What are the reasons behind this pusher propeller configuration?

Can a pusher configuration sort of like this have its propeller close to the tail (if it were one of those split tails like on a A-10)? Why did they put the propeller above the cabin and not in ...
6
votes
5answers
3k views

Could turbine or compressor stages of a jet engine be switched off to improve fuel efficiency?

Active fuel management is a technology developed by General Motors, which is used to improve engine efficiency in the times when the engine is operating under loads which are considerably less than ...
8
votes
4answers
3k views

Is there anything wrong with this more symmetric aircraft design, and why isn't it used?

I imagine a fixed wing airplane design that's a lot more symmetric than what I see today. This symmetric design has wings in the middle of the fuselage (neither high wing nor low wing), and the ...
10
votes
2answers
8k views

What are the differences in aircraft performance between tractor and pusher propeller designs?

Some aircraft have pusher type propellers. In what ways is it different from a tractor type propeller? What's are the advantages and disadvantages over a tractor type.
6
votes
4answers
947 views

Can wing-tip vortices be reduced/eliminated with a rear-facing propeller near the wing-tip?

Let's say we have a propeller-driven aircraft in the pusher configuration (rear-facing propellers). If we could somehow put an engine at the wing tip (ignoring structural concerns), and maybe make the ...
2
votes
2answers
783 views

Why do helicopters typically have blades at the top?

This question has several great answers showing that it's perfectly possible for a helicopter to fly with its blades underneath the rest of the aircraft. There are some obvious issues with having a ...
5
votes
2answers
1k views

Is 1 propeller always more efficient than 2?

Based on other answers I've read here (1) (2) (3), a single large blade propeller is the most efficient type of thrust you can get. There are 2 reasons for this (as I understand it). Firstly, ...
3
votes
4answers
575 views

Which 'pusher' propeller aircraft have been used in active military service?

The only 'pusher' aircraft I know of that has been used in active military service is the SAAB 21. There are several prototypes out there, but I can't see that any others were used. Which, if any, ...
3
votes
3answers
194 views

Does propwash increase pitch stability?

Here is a polar for a piston single-engine aircraft: (This is lifted from a Russian manual for Yak-52, so $C_x$ is drag, $C_D$, and $C_y$ is lift, $C_L$). 1 is the 'normal' case without propwash. 2 ...
-1
votes
1answer
227 views

Which propeller configuration is the one that generates the least turbulent flow in a wind tunnel?

I looked at the post here but still have some questions Why are push-propellers so rare, yet they are still around? This is along the same idea but the answers are not too helpful either. Pros and ...

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