Focus on the exhaust of the engine when the ignition starts, you can see the heatwave in the background

Italian Leonardo da Vinci had already found answers to many of these questions over 500 years ago.

Awesome thanks !

This is incredible to know, as scared as I am looking into a jet engine when i board a plane, it still is fascinating

I died of boredom after 2 minutes.

I’m an airline captain…and this is a pretty cool video… However, starting the 2nd engine with air from the first is NOT a normal procedure… With normal APU operation, both engines are started in the same manner… Cross-bleeding works fine(using air from the 1st to start the 2nd), but it’s not the norm….

Great explanation but one sound missing. I could not hear the igniters cracking. I always enjoyed hearing that when near a turbine starting.

Very informative . Thanks.❤

What happen if engine start st first stage only, will the sir flow to the other egde.

at 4:33 the #1 engine is #2 and 2 is 1

0:09 747 GANG

how come

Very nice video. Well explained for beginners like me, who are aviation enthusiasts. Thanks for sharing.

"How do airplane engines start?" Generally reliably.

Great explanation of the start sequence on the ground. What about the engine restarting process in the air?

No such thing as centrifugal force. Centrifugal motion yes, but not a force. You’re referring to centripetal force.

No one knows, it’s just magic

Starter shutt off valve is the valve that opens when pilot selects "start" to allow the APU air to hit the air turbine starter motor mounted at around 6 PM position on each engine. Starter shutt of valve is a butterfly type valve mounted in the air ducting between APU and the air turbibe starter, it is electrically controlled. Air turbine starters are high speed low torque units, however a built in reduction gear system converts this high speed low torque to low speed high torque which is capable of rotating engine through a gearbox, also mounted on the engine. Leave me a note if some one is interested to learn more. Any topic, airplane related.

This is enough to scare the daylights outta ya' if you're about to get on a flight.

Did you ever notice there are NO atheists on a plane when it hits turbulence?

Here we go again with more of that 💩 nauseating noise/music!!

So is 50% of max rpm considered the lowest speeds these engines run at or can they decrease below this once they are started?

Very Great.

Best explanation I've ever seen

GREAT INFO. FOR US OLD PROP PILOTS. I KNEW THE PROCESS IN THE OLD 707 DAYS. I HAVE HEARD THIS NEW PROCESS MANY TIMES. NOW, I KNOW WHAT I HEAR. THANKS.

Unnecessary annoying music

@5:00 i got a b888r.

this is very scare my cat is sad

Swap the engine position numbers @ 4:28...

I had a ‘70 Volkswagen Beetle that started the same way, only I had four friends provide the forward movement.

Good information

Thank you professor. You make a very good teacher.

Nicely explained.

Last statement you made that you're ready to fly is misleading. 😂 You didn't start engine two! 😛🤣🤣🤣

Can we please have it within the incredibly annoying and distracting background music?

Wrong

At 2:48 there is a minor suggested change. It's not the pressure of the air that ignites the incoming fuel. It's the existing flame in the chamber. An excellent video. Nice job.

Best video ever, I completely understanded the idea from you. Thank you.

that was sick!

Question or questions, I was taught the lift of the wing ect, but if it’s really true, why does the plane need to to pull back, it’s really not lift, it’s just angle of attack. Point can be made why can a air plane fly upside down. Of what I say is true, but with the wing causing low pressure just basically helps it fly better. So anything can fly with a big enough e give then.

The first human built “wing” was probably a boats sail but it could have been the boomerang. Both use wing principles. The boomerang was almost certainly the first human guided missile as well as it’s designed to change it’s trajectory to hit birds in flight.

Date: sure! I’d love to go back to your place, what are we watching? Me:

Can’t you hold a pen properly ?

B787 uses a VFSG electrical starter/generator. No air is used.

This is very clear and may well be correct. But it has its doubters in the science world. Newton's 2nd and 3rd laws of motion provide a clear and simple alternative, as follows... the wings push a mass of air down, imparting a vertical component of velocity and hence momentum on the air. Since force is defined to be rate of change of momentum, ( Newton's second law ) it follows that this air experiences a force vertically down. Newton's third law tell us that when one object, the wing, exerts a force on a second "object" , the air, then the second object must impart an equal and opposite force on the first object, the wing. So the wing experiences a lift force.

Good content, but the voice is terrible, please do not be so monotone

in 2024 you should not explain it like this and not in the 1980s either. There is a flow above the wing. the has a shape. The atoms and molecules in the oncoming air have mass. They have trouble following the wing shape but they have to fill the void somehow. So the distance between molecules get larger and the air pressure drops. And this is Exactly how a sail on sailing boat works. Angle of attack ... if it increases makes it even harder for the molecules to follow the shape and air pressure drops more and lift increases. Molecules are hitting the under side of the wing so there is always lift there but majority on the top of the wing. If angle of attack increases further the molecules can not follow the wing shape anymore. The void have to be filled somehow so you get turbulent air that loops around 180 degrees to fill the void. In any case the purpose of the wing is lost you have turbulent air and much lift is lost but not all but most is lost.

Lol the royals 🤣

Still misses the point. If compressing the air over the wing creates a low pressure zone, why not a bulge at the back of the wing instead of the front. Our even a bigger bulge in the middle of the wing. A 10ft bulge must create tremendous lift. The balloon experiment proves it’s not the fast moving air on top of a wing that lifts the plane because the air is accelerated the same on both sides of the balloon. And somehow it stays aloft. How?

The angle of attack on takeoff of the last 380 seems to defy all laws of physics. Looks as if it is about to stall , but doesn't . Great videos , well done, so informative .