Questions tagged [engine-starting]

The process of taking an engine that is shut down and getting it running again.

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15
votes
4answers
11k views

What instructions should I give to an untrained passenger for Hand propping Cessna 172N as a pilot?

Does anybody know what is the most effective way of hand propping a Cessna 172N, with a passenger who is not mechanically inclined. So you need to give them the most easy to follow and simple ...
6
votes
3answers
3k views

Why are engines with carburetors hard to start in cold weather?

Why are engines with carburetors hard to start in cold weather? And why is there a different procedure for hot start scenarios, after you've just shut down the engine and want to power up again?
16
votes
2answers
7k views

What is the loud noise of a helicopter when the rotors are not yet moving?

What is the loud noise when a helicopter is ready to start flying, but the rotor is not yet rotating? For example at Trump's "chopper talk", when he is intercepted by reporters on the way to Marine ...
3
votes
1answer
179 views

Why is the generator turned back off for starting the second engine on a King Air?

The engine start procedure for the Beechcraft King Air B200 says (emphasis mine): Right Ignition and Engine Start Switch – ON [R FUEL PRESS] annunciator – OFF Right Condition Lever – LOW IDLE (...
0
votes
1answer
115 views

How exactly are checklists shared between the pilots?

Plane startups are shared between the crew But how exactly? Does the captain do the startup and then ask the copilot if everything is correct? How exactly does it work? Is it aircraft specific or ...
7
votes
2answers
491 views

How is the JFS manual hand pump operated on an F-16?

The JFS (Jet Fuel Starter) on an F-16 allows for two attempts to start the engine. https://www.quora.com/How-do-you-start-the-engine-on-an-F-16-Fighting-Falcon However, if this fails, there is a ...
0
votes
1answer
121 views

PT-6 Starting problems - PT6A - 67B, installed on a PC12

we are having trouble starting our PC12. After introducing fuel at stabilized 13% ng, the engine spools up very slowly - it takes forever to get through 20, 30, 40%ng. We've had several hung starts, ...
7
votes
1answer
661 views

What is the procedure for restarting an F-16 in the air?

If there is a flameout on the F-16 in the air, what is the procedure for restarting it? I'm sure this is an elaborate checklist, so I'm only asking for an overview of the key parts, especially I'm ...
0
votes
2answers
385 views

Do large commercial aircraft have keys? [duplicate]

Do the likes of 737 or a320 or 777 or a380 as examples have keys to the aircraft or to initiate the flight deck? Or are aircraft unlocked and to start the engines it's just a flick of a switch or ...
8
votes
2answers
1k views

Why are the engines on the MAX and neo prone to bowing?

The engines of the 737 MAX$^1$ and Airbus A320neo family$^2$ are [more] prone to bowing (shafts deforming if no debow is applied during start – as I understand it, this happens in a turnaround while ...
2
votes
1answer
151 views

Turbofan engine 2 spool - Turbine drives the compressor or Starter drives the compressor [duplicate]

I have read somewhere regarding turbofan engine 2 spool that says "LP or HP turbine will drive the LP or HP compressor" "During engine starting, the starter will drive the HP compressor via the ...
2
votes
1answer
184 views

Why is there a minimum altitude for at least some high-speed jet engine restarts?

While reading this other question about envelope constraints for jet-engine restarts, I noticed something odd in the graph provided (of the relight envelope for the Honeywell HTF7000 medium-bypass ...
2
votes
1answer
342 views

Why don't the ATR 42's propellers start/stop rotating simultaneously?

Why is it that for the ATR 42 one of the propellers begins to rotate before of the other? I've noticed that they also stop rotating at different times. Is there a reason for that or is it just for ...
5
votes
2answers
888 views

What is the risk of leaving the MAN START PB 'ON' on the A320?

During a manual start on a A320, the ENG MAN START P/B opens the start valve which then runs the starter motor. During the MAN START process, at some point, the start valve closes automatically. What ...
4
votes
2answers
489 views

How long does it take for a regular size airliner jet engine to be warm?

How long does it take from starting of turbine or turbofan or turboprop, either by using an APU or other methods, until the engine is warm enough for safely extracting full power for takeoff?
-1
votes
1answer
205 views

In BGA or ATR's what are the major causes of ODOR in Cabin or Smoke in Cabin? [closed]

In BGA or ATR's what are the major causes of ODOR in Cabin or Smoke in Cabin? There are some of the maintenance activities that are related to removal of Engines or APU. Removal reason: Smoke in cabin ...
7
votes
1answer
830 views

For how long is an engine start clearance valid?

If a pilot receives a clearance to start the engines, is the clearance void if he doesn't start them within a certain amount of time? How much time is allowed for starting the engines and where is it ...
12
votes
3answers
4k views

Is center tank fuel required to start the 737-800 engines?

I have been doing some flights with the 737-800 and when there is no fuel in the center tank, the engines won't start. Is it like that in real life?
8
votes
1answer
1k views

Which commercial aircraft can perform a parallel engine start?

In various Youtube videos, e.g. this one, one can see that the Boeing 787 is capable of a parallel engine start (both engines are started at the same time). Are there any other commercial aircraft ...
12
votes
2answers
2k views

Why must some aircraft get permission to start their engines?

Some larger airliners must get ground control permission before starting their engines. Is this based on size? Does a Learjet need permission? Is this just turbines? For example does a DC3 or DC6 ...
4
votes
1answer
2k views

What are the consequences of pumping the throttle in an carburetor piston engine airplane during start?

I have seen an expert commercial pilot pumping the throttle during start for a Cessna 152 and ever since I thought that was ok to do so, but recently studying for ATPL I read about that these ...
2
votes
2answers
3k views

Why are there different starter limitations for dry cranking and manual start on the A320?

I recently had this point clarified that when we place the mode selector to CRANK on the A320 we can dry crank the engine up to 5 mins. But the moment we place the mode selector to IGN/START then we ...
2
votes
1answer
662 views

What will happen if we start the A320 engines but we don't wait for the amber crosses on the E/WD to disappear?

My logic is that we should wait for the sensors to register the present indications so we have a proper idea of what state the engine is in particularly the EGT if we have to consider a manual start.
1
vote
1answer
197 views

Viability of Magnetically started engines [closed]

I am working on a school project of mine which involved testing the viability of a magnetically started jet engine. By magnetically started, I mean that there are magnets which accelerate the main ...
9
votes
2answers
3k views

Cessna 172: at which RPM should the oil pressure reach the green arc?

I am part of a team developing a Cessna 172 P model for FlightGear, an open source free flight simulator. We are now trying to improve the oil pressure and temperature simulation, and we have a ...
5
votes
1answer
2k views

Do some radial engine planes have a two-speed starter motor?

(YouTube) Watching the Connie fire up her engines I wondered, do some radial engine planes have a two-speed starter motor to replace the ground crew "pulling the props through"? In other words, low-...
3
votes
1answer
599 views

What is meant by “fuel flow: on ” in checklists?

What is mean by "fuel flow: on " in checklists? For example: http://www.projectlear45.nl/docs/Checklist_LEAR45.pdf
7
votes
1answer
4k views

How is bleed air used to start a jet engine?

I know that most jet engines on commercial jets are started either with bleed air from an APU or bleed air from the other engine... But I'm not exactly sure how bleed air actually starts the engine? ...
16
votes
2answers
14k views

Do F-22's use cartridge start to start engines?

What method does the F-22 use to start its engines? In the video below, you can see a flap open and flame and steam shoot out as the engine starts to spin up. Is this an example of cartridge start? ...
6
votes
2answers
3k views

Is it possible to hand start modern planes?

I know that older planes must be hand started but are newer GA planes even able to be hand started by spinning the prop? If so, how do you do it safely without cutting your hands off or being pulled ...
4
votes
1answer
260 views

Could the Grumman G-21 Goose be started by punching the instruments?

In the 1985 movie "Commando", John Matrix (played by Arnold Schwarzenegger) initiates engine ignition simply by punching the cockpit dials after several failed standard attempts. Could this ever ...
2
votes
3answers
629 views

Is a recoil start (hand propping) allowed if it isn't mentioned in the aircraft manual?

Is a recoil start (hand propping) allowed without it being referenced in the aircraft manual? In a Cessna 150, for example.
22
votes
2answers
9k views

Why do ground crews rotate a radial engine's propeller before a motor/cartridge start?

In footage from WWII you often see the ground crew rotating the propeller of a radial engine a number of times before the pilots start the engine. I know it's not the same as hand-starting (hand-...
0
votes
1answer
678 views

Is it possible to start the engines while on push back? [duplicate]

I was recently on a flight and the the engines started after push back has been initiated. I was always under the impression that the process required a GAU to feed pressurised air or use of the APU. ...
8
votes
1answer
3k views

Why do I hear the “real” engine noise only when the plane is on the runway?

I understand that (from other answers) planes taxi using engines only. But, when I'm a passenger, then why do I hear the "real" engine noise only when the plane is on the runway? So, if planes taxi ...
11
votes
5answers
4k views

Is starting a jet engine without ground support possible?

We have had more... than... one question about jet aircraft taxiing about the airport without their jet engines running. Those address several issues such as cost vs savings and regulatory approval. ...
4
votes
1answer
545 views

Can a jet engine be restarted after a catastrophic failure? [closed]

I have a retired 747 pilot saying that a catastrophic jet engine failure could be restarted. I have little or no training, but I believe that the word "catastrophic" means that there is no recovery. ...
-6
votes
1answer
427 views

How does the start and ignition of aircraft gas tubine engines work?

2a) How does the APU produce the required starting air supply. b) How is the starting air supplied and controlled from the APU to the engine c) Describe how the torque from the starter motor is ...
1
vote
1answer
319 views

Is there something like an ignition key for planes? [duplicate]

Is there something like an ignition key for planes? Or could one "just enter" and fly away if they could?
12
votes
2answers
2k views

How long does it take to restart a turbofan engine inflight?

I'm especially interested how long it would take to restart a turbofan engine after a hypothetically erroneous shutdown of an engine immediately after takeoff i.e., at an altitude at which the air is ...
0
votes
1answer
631 views

What is engine-out taxi out time?

What is engine-out taxi out time? a) The time between the first movement of the aircraft under its own power and the start of the last engine b) The time between the first movement of the aircraft ...
6
votes
2answers
7k views

Why is engine No.2 started first, instead of No.1?

I realized that some Boeing manuals recommend that the engine number 2 must be started first, is there any special reason for this?
11
votes
3answers
8k views

How do you start a jet engine if the start valve is stuck closed?

I was recently on a flight aboard an Airbus A380 where the flight was delayed 2 hours. The reason was claimed to be a start valve fault on engine #4, where it was stuck closed. According to the ...
26
votes
6answers
68k views

How are turbine engines started?

What happens to a turbine engine from the time that a start is initiated until stable idle is achieved? What can go wrong?
1
vote
1answer
1k views

Experiences with LiFePO4 starter batteries in light aircraft or motorized gliders? [closed]

I am interested in real-life experiences to do with using LiFePO4 batteries in light aircraft and motorized gliders compared to standard PbA ones. LiFePO4 seem to be a very attractive alternative to ...