How Engines Are Attached To Aircraft

We are all used to seeing two or four engines mounted in pods under the aircraft wing. This has become the standard engine attachment for all large commercial aircraft. Their attachment, though, is interesting and complex, and isn’t as simple as just bolting the engines onto the wing as securely as possible. So let’s take a look at what’s involved in this process...
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[@MrSkydiverDan]

You put out videos on things I never would have thought about, but that’s why I love this channel! Always super interesting topics 👍

[@alexknoll3265]

I'd like to also learn about the other attachments like fuel lines, bleed air system, starter, etc.

[@PavlosPapageorgiou]

The fact that there's an "Engine separation quick reference" is itself remarkable

[@jakenolan2572]

I mean, after American 191 the regulators didn’t want to take the risk of pilots not knowing how to operate an aircraft without an engine.

[@billotto602]

@@jakenolan2572 it's to make sure that the engine doesn't destroy the wing if something serious goes wrong.

[@patrickholl8497]

different video from the usual ones cause it was very technical and theoretical, but also very interesting cause it had the right length and i didn't get bored like on 45 minutes documentaries or so. Post more videos like that, I'd watch them although I'm not very much into technology but they're interesting and esay to understand :)

[@Fernando-cc2ls]

Loving every vid!

[@josephgomwalk5282]

Thank God for KZbin, I was literally curious about this five minutes ago now I know how the engines are attached to the wings. Thanks for this

[@alexanderordinary2110]

"engines are mounted either under the wing or behind the fuselage..." Honda jet: "hold my sake"

[@thillaiambalam5661]

Jet Token

[@hurleycapetown8420]

Not sure I wanted to know about it only having two bolts.

[@TheFlightmaster100]

Then I'll reassure you. You misunderstood him. He says its attached at two point, fan frame and turbine frame. The aircrafts I have worked on have had 4 bolts at the fan frame, and another 4 at the turbine frame. So all in all, 8 bolts attach the engine to the pylon (atleast on the 737ng and 787)

[@JohnZsAviation]

Keep up the great work love the videos

[@kunalguleria9617]

Great Video !

[@znariznotsj6533]

By bolts! Always thought they were glued... 😆

[@IdliAmin_TheLastKingofSambar]

Or maybe a couple of binder clips, y’know, if you’re literally in a pinch.

[@meowmeowmaxx]

@@IdliAmin_TheLastKingofSambar couple of zip ties does jt better than bolts mate

[@IdliAmin_TheLastKingofSambar]

@@meowmeowmaxx I’m American, so these days, zip ties make me think of scary people trying to kidnap school principals and overthrow the government. But I’m low-maintenance: I’m even fine with twist ties, like the ones that come with garbage bags and loaves of bread. If they’re good enough to keep my Wonder Bread all fresh and carb-y, I’m sure they’re strong enough to secure an engine to a wing! 😆

[@BetrelomyAlemayehu]

Thank you!

[@joshuahalla.k.a.controlla6333]

Great video. ☺

[@georgemukasabukenya1462]

Simple flying you're the best ever in aviation content

[@SimpleFlyingNews]

Thanks for the feedback! - TB

[@KOUKAROS-GR]

Next please how the moving parts like fan and turbine stay in their position while spinning!

[@Chris_at_Home]

They are support by bearings.Some are for support and others are for thrust so they keep the fan for pulling forward out of the engine. I worked at a factory building engines a little over 40 years ago. The engines I assembled were JT-8s and JT-9s.

[@azmike1956]

ath kouk, All engines have one or more thrust surfaces that control position of the rotating group & components. Proper shimming is critical! Without control the rotating parts could contact each other or at least experience diminished performance & seal failure. This is a very basic but hope it helps.

[@Chris_at_Home]

@@azmike1956 I remember on the JT-8s there was a coupler we installed that locked the low turbine shaft to the low compressor and fan as fan pulled forward and the turbine pulled aft.

[@flyingacross494]

@@Chris_at_Home how old are you!

[@Chris_at_Home]

@@flyingacross494 Old enough.

[@paulloveless4122]

Interesting stuff

[@unnirajagopalakrishnan]

Thanks a ton simple flying.. My biggest doubt solved in a couple of minutes.

[@SimpleFlyingNews]

Thanks for the feedback! - TB

[@alancats]

The jet engine mounts are vastly underappreciated, from engineering standpoints. When you think about the vast amount of thrust produced by these modern high-bypass turbofans, the engine's thrust force would make it fly off the wing, like a rocket, if it wasn't for a robust attachment to the wing. Needless to say, it's mission-critical for the engine mounts to be exceptionally robust. The tragic example of American Airlines Flight 191, in year 1979, tragically demonstrated what can happen when these engine mounts are damaged, due to negligent maintenance procedures. Thankfully, this was a rare accident that hasn't been duplicated, since.

[@donaldstanfield8862]

That was so sad, and completely preventable. Sad that they thought a shortcut on such a critical component was acceptable.

[@nijenplayz2429]

I watch all of your videos !

[@PavlosPapageorgiou]

0:44 ...it exposes the engines

[@Gabriel.Vargas]

Very interesting. It's like the removable rear derailleur hanger in a bicycle. It's designed to be strong and stiff enough to get the job done, but it will break first in case of a crash, saving the much more expensive bicycle frame or even the own rear derailleur. This is not for safety reasons like in an airplane, obviously, but for maintenance and durability reasons.

[@ericjones7769]

Nice!!!!

[@lohphat]

No mention of the HondaJet with engines mounted on top of the wing on pylons? Water landings with underwing engines usually result in the wings being ripped off as the nacells act as water scoops. Being above the wings allows a safer gear-up water landing.

[@kenugget9593]

Engines below the wing makes it easier for access during maintenance. I think also it is safer if the engine should break away in flight if it's underneath than above. Having overwing mounted engines will reduce the lift as well. HondaJet has their engines on the wings and states it reduces cabin noise since the engines aren't mounted to the fuselage, however, the noise is louder than for underwing mounted engines.

[@lucbaeten3344]

A320, Hudson river, Captain Sully : both engines separated, the wings remained intact

[@lohphat]

@@lucbaeten3344 Wnich is an exception to other water ditching. Most end with the wings tearing off and the fuselage cartwheeling resulting in massive casualties. One success doesn’t make it the rule.

[@guitarplayerforu]

Very interesting, great video 👍 One thing though, you forgot to mention aircraft with an engine mounted into the tail like the DC-10/MD-11, L1011 TriStar or Boeing 727 etc...?

[@samarokiam]

Interesting

[@robertwarn9756]

DC-10, L-1011, B727, DC-9/B717. Not small. Engines attached to rear fuselage or DC-10 & L-1011, inside rear fuselage. Concorde, in wing.

[@get2dachoppa249]

Concorde's engine were beneath the wing in nacelles.

[@danielassiak2072]

Cool

[@NeonSamurai4381]

I'm interested to know how the engine attachment differs on supersonic aircraft from subsonic aircraft and whether supersonic aircraft can be fuel efficient.

[@SarahC2]

NOOOO! They're attached further back! They don't stick out the front of the wing like this. I want my timeline back!

[@kencarp57]

This video made me think of the Far Side comic showing a goofy-looking airline passenger looking at two buttons by his seat: Button 1: Wings stay on Button 2: Wings fall off

[@bigpantsbobnuggets5051]

This explained to me why an engine mounted so forward of the wing isn't a huge lever bending the wing down.

[@SamUnreel]

What would be the preferable attachment to a blended body aircraft then?

[@AsadAli-px8op]

SO INFORMATIVE VIDEO. WORLD WEATHER IZ CHANGING RAPIDLY I DON'T KNOW HOW PILOTS WILL COPE WITH WEATHER

[@alexanderhall4281]

Engines these days are a marvelous sight why wouldn't you want to see them, especially the GC90s

[@AluminumOxide]

In 1992 (also on this day the video was uploaded), an El Al airlines (flight 1862) cargo Boeing 747 suffered a dual engine pylon bolt failure a few minutes after takeoff. The plane crashed into an apartment complex in Amsterdam, killing 43 people.

[@donaldstanfield8862]

It was a cargo aircraft, wiki says there were 43 deaths plus major and minor injuries. 4 on board 39 on ground

[@AluminumOxide]

@@donaldstanfield8862 most of the fatalities occurred on the ground in the apartment complex

[@DannoAviation]

_DC10 has entered the chat_

[@withamarshview1436]

Only two attachment points? Tell me more about those bolts!

[@wikusmeijer]

These bolts are called phalanges. There are two of them, a left phalange and a right phalange.

[@TimKunert]

Small mistake, at 1:06 you probably meant CRJ Family, because on the ERJ Family the engies are configured in a conventional layout.

[@spongebubatz]

ERJ is actually the name of the E135 to E145, the other are called E-Jet!

[@letsseeif]

Engines on pylons beneath the wings is a pragmatic solution. Sure the Boeing 727, DC9, HS Trident, SUD Caravelle were early success. Successes due to engine out issues and aerodynamic advantage, and passengers in quieter cabins and rear an front entry and rear egress simultaneously. But like most things, it comes down the pragmatic solution. Cheaper is better. Engines beneath wing make sense especially now the aero industry has powerplants that allow 'engine out' safety that didn't exist pre large to massive bypass/turbofan power.

[@Kolan_Koala]

They are also put under the wing to allow fuel to the engine via gravity in the event of a fuel pump failure.

[@hilman94]

You know you're old when the example of tail mounted engines are not Caravelle, B727, DC-9/MD-80, or VC-10 anymore 😅

[@peeticek1624]

So the 4ton jet engine is hanging just on 4bolts?!

[@mrBSim1]

8 Bolts, 4 Nuts and 4 Barrel Nuts

[@alexanderhall4281]

They look much better under the wing.

[@rajr5936]

I always had this question.....how wings carry Engines weight?

[@alancats]

The explanation that I've read is that the fuselage is basically built on top of the wings. The wings are exceptionally strong structures. The engines' weight, plus fuel weight (inside the wing) actually benefit the wing's structural integrity during flight, by counter-acting the lift forces that are producing lift, underneath the wing.

[@donaldstanfield8862]

@@alancats The wings are bolted to the main frame, just like everything else...

[@nurrizadjatmiko21]

Interesting 🤔 and because of this interesting video. 29 years ago October 4 1992 is El Al Flight 1862. A 747 200F has crash into a 11-story apartement block at Amsterdam. The cause of this accident that killed 43 people is the result of the faulty fuse-pin on the pylon of Engine 3

[@azmike1956]

Muhammad Nurriza, check out the DC-10 crash on takeoff at Ohare years ago.

[@nurrizadjatmiko21]

@@azmike1956 yes i know that

[@foreyfriend145]

wasn't it fog, bad weather?

[@azmike1956]

@@foreyfriend145 no, the mounting system failed & released engine #3 which severed electrical & hydraulic lines. Plane did a wingover into the ground. 12 days later all domestic DC-10'S were grounded.

[@longbeach7623]

@@azmike1956 it was actually engine number one.

[@MSRTA_Productions]

Hmm

[@gooner72]

How are the engines attached to the wings.......? Well, hopefully.

[@AB-ov1zm]

U missed out vibration damage

[@millercool21]

Flex glue

[@jamesbambury]

Engine Strut, pylons hold weapons on fighter jets.

[@bigchris1989]

It’s for water landing. The bolt setup is to let engine break away during water landing. This video didn’t cover what the title said it would, please stop misleading people for views.

[@niekdros4147]

wow im early!

[@donaldstanfield8862]

How early are you!?

[@luckywest1467]

I don’t even know why I’m watching this, we changed an engine last week. Lol

[@saigopal5086]

Video suggestion: Why is A320 more common than B737 In India 🇮🇳?

[@drhmufti]

2 bolts!

[@Dominus_Potatus]

I need "How to reattach emergency windows?" ASAP!! I accidently open the emergency after people is releasing biochemical weapon aka F.A.R.T

[@airtesamaviation]

U forgot crj 900

[@polishavgeek1849]

Engines are attached to aircraft by aircraft engineers.

[@neunundfuenfzigposition]

1000 IQ

[@mfeick838]

Aircraft mechanic here: "With high strength bolts into a thrust bearing structure, some hoses and electrical connections" there saved you some time.

[@covercompositionandmixes9203]

Hey Michael, is the Aircraft Mech. job as physically demanding/ as hard as construction jobs?

[@dmacfpv8410]

Pods?? Really??

[@markomare9081]

Titanium material

[@jelisontejada1758]

This wasn’t the one that won in the poll🥱🥱🥱

[@spongebubatz]

The poll was about which video the community wanted to see first, not which they want and don’t want. I assume they have all videos produced in advance anyways

[@jelisontejada1758]

@@spongebubatz i know but they haven’t put the winner video

[@jelisontejada1758]

@@spongebubatz oh wait sorry they did 4 days ago I just checked my bad 🙏

[@donaldstanfield8862]

@@jelisontejada1758 Hehee...

[@randomdriver]

Hahaha. How weak are those swiss maintenance guys! Needing a three man to torque the engine mount bolts. Until now I have been doing it alone with no problems to CFM and CF6 engines.

[@riderszone1244]

Mehhh......