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Questions tagged [throttle]

Levers in the cockpit that control engine thrust

14
votes
1answer
2k views

Why does the B-29 not have pilot-accessible thrust?

Watching this incredible B-29 Superfortress flight, I was amazed to see that it required a dedicated person to manage the 4 engines and their power levels. Why was the throttle not placed between the ...
2
votes
2answers
161 views

How does the throttle position affect the speed of airflow to the engine?

It is said that the less we open the throttle the slower is the speed in Venturi tube, thus less reduction in pressure and less fuel is being sucked from float chamber, however, actually if we reduce ...
27
votes
3answers
4k views

Why would a turboprop rev down just before going full throttle during takeoff?

The only turbprop I've travelled is the ATR 72. I've noticed that the props' rev go down (for like a second, the sound also goes down) just before engaging full throttle in order to takeoff. I've ...
5
votes
2answers
329 views

Do any aircraft use throttle steering during normal flight?

If the engine(s) on one side of a multiengine airplane are set to a higher throttle setting than those on the other side, the airplane (all else being equal) will yaw towards the lower-throttle side; ...
3
votes
2answers
1k views

Is it harmful to operate an engine “over square”? [duplicate]

Never Fly Your Engine "Oversquare!" is an old recommendation. This wisdom cautions pilots that selecting a power setting with a manifold pressure in inches higher than the RPM in hundreds is damaging ...
0
votes
0answers
44 views

Are throttleable rocket engines the less efficient the lower the power setting?

Are throttleable rocket engines less efficient the lower the power setting? Logically that would lead to lower pressures in combustion chamber and so lower thermodynamic efficiency. Or is it remedied ...
4
votes
2answers
186 views

What is the throttle setting of a piston aircraft during cruise?

I am learning to fly nowadays, I am sorry if this sounds like a dump question. What is the throttle setting of an aircraft during cruise flight? After stabilizing the flight after climb do i need to ...
2
votes
3answers
381 views

What are the consequences of throttling up past 100% of N1?

The B737 is probably my favorite aircraft and I'm always sure to never throttle past 100% of N1. I was told the aircraft is pretty much totaled if you take N1 past 100% but you can eke out that extra ...
1
vote
1answer
136 views

How can using split throttles help when landing twins in crosswinds?

In General Aviation light twins, when landing in heavy crosswinds, what are some considerations to using asymmetric (or Split) throttles to induce a sideslip, to align the fuselage with the ground ...
4
votes
1answer
214 views

How are rotary engines controlled?

Listen closely to the engine sound here. It seems to me all rotaries continuously sound on/off. Is that a pilot application to manage the engine's torque (with the whole block rotating), or as ...
2
votes
1answer
752 views

Does the F-16 have a speed limiter?

In an aircraft like F-16, how do the pilot prevent going faster than Vne (velocity, not exceed)? From the block 50 manual it seems to indicate Vne is 800KIAS/2.05M. I believe even the earliest F-16s ...
5
votes
1answer
2k views

What throttle setting does an airliner use while cruising?

As a passenger, I have always felt like the engine are not kept at take-off thrust/full throttle a few (tens of) seconds after take-off, and so for obvious reasons as fuel efficiency, engine wear ...
13
votes
2answers
884 views

Why are the B-52 thrust levers advanced inside-out?

As I understand, the standard procedure for advancing the throttle (for take-off) is as follows: Advance throttle to desired engine input & output (N1 & N2) Release brakes Gradually increase ...
1
vote
0answers
108 views

Does throttle control altitude and yoke control airspeed? [duplicate]

I read that Throttle controls altitude and control wheel/ stick controls airspeed. Is that true? if so please explain.
4
votes
2answers
317 views

Can pilots land an aircraft with only the use of throttles?

Presuming that all other means of controlling an aircraft are unavailable to a pilot, can a pilot land a commercial airliner safely by using only the throttles and are pilots trained to do so?
3
votes
3answers
941 views

Why doesn't the plane accelerate/move forward when it's at rest, if the propeller is spinning?

I'm having difficulty seeing the difference between a stationary plane and a moving one. When you start the engine in the C172, the blades on the prop are spinning - but the plane doesn't move at all....
8
votes
2answers
1k views

Can throttle control be considered as a primary flight control?

My flight instructor asked me if throttle can be considered as a primary flight control?
4
votes
1answer
707 views

Why do jet planes with multiple engines have separate throttle levers for each engine?

What are the reasons to not just use one throttle lever for all engines?
8
votes
2answers
494 views

What factors determine the power curve of a jet engine?

From YouTube The L-39 in the video is powered by an Ivchenko AI-25, from the footage we see that the engine idles at 60% N1, and the taxi power setting is 70% N1. (The other lower-reading needle is ...
8
votes
1answer
1k views

What are these spinning discs next to the throttle of the Boeing P-8 Poseidon?

The source video can be found here and the GIF is from 0:21 onwards. What are those 2 spinning things next to the throttle ?
8
votes
1answer
770 views

During a touch and go (C150) should I first raise flaps or set full throttle?

I am now finishing my PPL (on a C150 in Czech Republic) and today had quite a close call when doing a solo touch-and-go on a short runway. We train on grass (and therefore rarely completely level) ...
3
votes
2answers
937 views

Why does a turboprop lag?

Compared to a [modern] turbofan/turbojet, why is the throttle response slow in a turboprop? A constant speed propeller mounted on a piston engine responds much quicker. Is the underlying reason ...
6
votes
2answers
1k views

What is the relation between throttle position and engine thrust for a turbofan?

I wonder how is designed the command chain from the throttle lever or the auto-throttle to the fuel injection in recent jetliners. I have 4 questions: What is set by the throttle? When the pilot ...
23
votes
2answers
3k views

How does aircraft maintain precise speed, e.g. in formation flying or refueling?

I understand ailerons, elevators and rudders can be controlled to a very fine degree, and in precise flight, like formation flying, they can be used for very fine course adjustments to maintain the ...
0
votes
2answers
375 views

Requirements for Steady Level flight at various speeds [duplicate]

Let an aircraft in a steady level flight be trimmed at certain speed. A level and steady flight at a higher speed can be achieved by changing throttle and elevator together ( and not just by changing ...
10
votes
5answers
2k views

What alternative methods are there for controlling a plane when flight control surfaces have failed?

I saw a TV show once about Japan Airlines flight 123, in which the aft pressure bulkhead ruptured, disabling hydraulics and ripping off the vertical stabiliser. So the flight crashed after some time ...
14
votes
2answers
2k views

Why must the throttle be moved slowly?

User 'Calphool' writes: For example, in a real plane, if you jam the throttle forward too quickly, you can kill the engine or make it backfire. This may sound like a trivial detail, but people have ...
9
votes
4answers
17k views

How do Throttle control and Propeller control work together?

I haven't been able to understand. If propeller control controls the pitch of the blades in a constant speed engine, what do the throttle control do? I've seen (in some normal operation manuals for ...
9
votes
3answers
2k views

During takeoff, why throttle forward then raise hand from throttle to push a button, instead of pushing button then throttling?

Preface: The comments assert the video to have been horizontally flipped, probably because (I am divining) the original belonged to someone else (user 'Jb380' if I remember)? At 4 mins 3 secs of this ...
25
votes
2answers
6k views

Are large passenger aircraft steered during taxi by changing the angle of the front landing gear?

When moving to and from the runway, does a large passenger aircraft turn by changing the thrust difference on its side engines, or by turning the front landing gear to a different angle? If it is by ...
13
votes
2answers
1k views

Is it possible that derated thrust takeoffs are safer than normal takeoffs?

The reason for my arguments here are (assuming that you have sufficient runway distance): That with less thrust, less force should also be required to hold the aircraft as desired, and possibly the ...
22
votes
3answers
7k views

Why are the throttles of aircraft such as the Twin Otter placed on the overhead panel?

Some aircraft such as the DHC-6 Twin Otter, have their throttles on the overhead panel: Is there a reason that they are not on a center console between the pilot seats or mounted to the panel like on ...