Questions tagged [throttle]
Levers in the cockpit that control engine thrust
57 questions
1
vote
2
answers
166
views
How can I control my airspeed using throttle to command?
I am developing code for a fixed-wing aircraft in ArduPilot to control desired airspeed and vertical speed through attitude commands (roll, pitch, yaw, and thrust) in simulation.
I understand the ...
- 11
1
vote
3
answers
298
views
How can I control the flight path angle (or the ROC) with throttle in Simulink?
I need to implement an autopilot for my 3DoF (longitudinal motion) aircraft model in Simulink. My model is nonlinear, but linearizing it in Simulink hasn’t been an issue.
I’m trying to develop a ...
- 55
0
votes
0
answers
198
views
Typical maximum airliner throttle settings during taxi
What is the typical maximum throttle setting during taxi of a big airliner, e.g., A350, B777, etc.?
Thank you.
Fabián
- 1
2
votes
1
answer
126
views
Is there a simple formula for estimating supercharger throttling losses?
I’ve noticed that in both Aerodynamics for Naval Aviators, and most old WWII engine power charts, power vs altitude seems to be composed almost entirely of linear relationships: at a given ...
- 81
3
votes
3
answers
838
views
How to calculate sfc per throttle setting of an turbofan engine?
I was looking for sfc per throttle setting of an engine. I was not getting the performance data of that engine. So is there any way to calculate it by formula?
- 121
1
vote
2
answers
457
views
Questions about cockpits
I was looking at some plane cockpits, and I wondered something. We see the F-4 Phantom's cockpit below:
Obviously, very analog. Then, we entered a new era of cockpit design, where we had designs like ...
- 167
0
votes
1
answer
885
views
What is the purpose of mixture control? [duplicate]
What's the purpose of mixture control? Is it to control the amount of fuel provided to the engine with which it is associated? If that's the case, what's the purpose of throttle lever then?
- 1
7
votes
2
answers
4k
views
Is there any reason on passenger airliners not to have a physical lock between throttles?
A physical lock so one throttle can control all of them. Sure there would be circumstance to disconnect it such as engine failure and possibly wind shear but there really too many instances of pilots ...
- 572
3
votes
1
answer
1k
views
Why does airspeed increase with more throttle if RPM stays the same?
Given a constant speed propeller, the RPM will stay the same because of the governing system which changes the blade angle. But in cruise flight if you add more power and keep the RPM's the same, ...
- 297
3
votes
1
answer
278
views
How much thrust should be applied when you set the autopilot to a specific altitude?
After a plane takes off the pilot usually sets the autopilot to the altitude of the flight level they are about to cruise at, e.g. 30,000 ft, right? When that is the case, how much thrust should be ...
- 393
4
votes
0
answers
741
views
Why are there two different throttle designs for the 757 and 767?
There is this one, which seems to be the older version. Notice there is a big gap between each lever, except at the top.
And this one. Notice there is almost no gap between each lever, making it ...
- 1,687
0
votes
1
answer
280
views
How did the MiG-25M prevent a flameout?
How do afterburning turbofan or turbojet planes prevent or minimize the risk of a flameout at nearspace altitudes such as Fedotov's Mig-25M that went higher than 115K ft (35 km) two times? At these ...
- 29
6
votes
1
answer
423
views
What happens if you change power setting with constant mixture setting?
For a given Cruise Setting: Manifold set / RPM set / Mixture set according to P.O.H. values: what happens to the Mixture if you were to reduce power or increase Power by varying throttle? Does a ...
- 925
2
votes
3
answers
327
views
Does throttle equal power on a turbocharged piston engine?
On a normal piston engine powered airplane, throttle equals power. If I set the throttle to 50 %, I will get 50 % of the power the engine can develop at the current altitude, temperature, etc. In a ...
- 1,404
16
votes
2
answers
3k
views
What does the "MAX EMR PWR" lever do in a Quest Kodiak?
On a photo of the Quadrant of a Kodiak Quest 100 there was an additional red lever to the left of the throttle (black handle) labeled with "MAX EMR PWR". Can anyone explain what what this ...
- 734
10
votes
1
answer
1k
views
Why do many small piston singles have panel-mount engine controls?
Most small single engine piston aircraft (C152, C172, C182, Pipers, etc) have panel-mount controls for throttle, mixture and prop, which sit quite far forward compared to where it would be comfortable ...
- 201
4
votes
2
answers
2k
views
What is the relationship between fuel mixture, throttle setting and engine temperature?
I'm trying to understand the relationship between mixture, throttle, and engine temp. In this article from AOPA, it states
... a lean mixture of 16 to 1 is not going to burn as hot as a rich mixture ...
- 151
0
votes
1
answer
312
views
Why did the pilot in this EC135 crash change the throttle setting after encountering wake turbulence?
I’m confused in this accident why the Eurocopter EC135 pilot decided to manipulate the throttle after encountering wake turbulence - I can’t think of a reason for this. Could someone please explain ...
3
votes
2
answers
520
views
When starting a turbine helicopter, why should one slowly increase RPM (throttle)?
After the ignition switch is turned ON, my Captain always increases the RPM (throttle) very slowly.
I don't know why, because our helicopter has an ECU.
One day, my Captain asked me "Do you know why ...
- 31
11
votes
5
answers
3k
views
Why does spin recovery involve cutting the throttle?
When recovering from a spin, the first step is generally to cut the throttle:
... Otherwise, to recover from an upright spin, the following generic procedure may be used: Power is first reduced to ...
- 28.6k
3
votes
0
answers
199
views
How did the Caproni Ca.60 electrical communication system work?
On the wikipedia page for the Ca.60 it says:
The two nacelles also housed a cockpit for one flight engineer each, who controlled the power output of the engines in response to the orders given by ...
9
votes
2
answers
3k
views
Did the twin engined Lazair ultralight have a throttle for each engine?
Did the twin engined Lazair ultralight have a throttle for each engine?
I know larger aircraft have dual throttles.
What about the smaller aircraft like ultralights?
It would be so much easier just ...
- 1,507
8
votes
1
answer
1k
views
Does the mixture and throttle setting affect the quality of priming of fuel prior to start?
This question is a generality. For airplanes with small reciprocating engines, does the mixture and throttle setting at the time of priming affect the quality of the priming or the engine start, or ...
- 9,072
0
votes
1
answer
2k
views
How are this helicopter's blades perfectly timed with the camera shutter? [closed]
This is a video of the Mi-24 helicopter. The rotor blades appear not to be moving.
Did the pilot and photographer sync the camera and helicopter to make this video and how? I do not know the true ...
- 1
2
votes
1
answer
191
views
During multiengine training, are pilots taught how to use the throttles for control?
The use of a multiengine aircraft’s throttles for steering and pitch control is critically important should the aircraft’s primary flight controls fail or severely malfunction; are pilots nowadays ...
- 28.6k
2
votes
1
answer
312
views
Why are the throttle levers for the Comet's outboard engines shaped funny?
The throttle levers for the Comet's outboard (#1 and #4) engines are weirdly shaped, with flanges that extend up and partially over the throttle levers for the inboard (#2 and #3) engines:
(Image ...
- 28.6k
16
votes
1
answer
5k
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 ...
- 14.5k
2
votes
2
answers
2k
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 ...
- 39
26
votes
3
answers
5k
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 ...
- 373
7
votes
2
answers
1k
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; ...
- 28.6k
3
votes
2
answers
6k
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 ...
- 11.5k
0
votes
0
answers
63
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 ...
- 2,544
4
votes
2
answers
2k
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 ...
- 171
3
votes
3
answers
3k
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 ...
- 133
4
votes
2
answers
1k
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 ...
- 6,175
5
votes
1
answer
737
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 ...
user14897
2
votes
1
answer
3k
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 ...
- 1,752
7
votes
2
answers
17k
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 ...
- 400
14
votes
2
answers
2k
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 ...
- 6,615
2
votes
0
answers
180
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.
- 69
5
votes
2
answers
633
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?
- 53
5
votes
3
answers
4k
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....
- 51
8
votes
2
answers
2k
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?
- 181
7
votes
1
answer
3k
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?
- 73
8
votes
2
answers
1k
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 ...
user14897
8
votes
1
answer
3k
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) ...
- 231
5
votes
2
answers
3k
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 ...
user14897
9
votes
2
answers
3k
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 ...
- 80.8k
26
votes
2
answers
4k
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 ...
- 1,337
0
votes
2
answers
802
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 ...
- 6,900