i feel like hes staring into my soul

Thanks for explaining something my ATPL book couldn’t do over 4 pages 😂

This is a really good video. It's short and sweet while being straight to the point but without being too detailed and/or too vague.

Did he ever blinked, I felt uncomfortable. But great video anyway

He didn't blink once.

"If those wings weren't swept, that [supersonic flow over the upper surface] absolutely could be the case" ... Weird turn of phrase, since with them being swept, that still is the case.

Crash course is a very good channel, helps me a lot, and even a 5 year old can understand rocket science from this

Actually, the main reason why wings are sweptback is to minimize drag in general and not just wave drag. Because there’s spanwise flow, this allows the air to slide along the wings instead of forcing all of the air over or under. I’ve heard it said it’s like sliding down a ramp instead of running into a wall. Though because only some of the air is chordwise as opposed to all of it like straight wings, this also means less lift because it’s the chordwise flow that generates lift.

Great video! You are always clear and go straight to the point with great explanation and animations. Thank you for giving us this innovative approach to learn also in aviation.

your speech and accent are so easy to understand and your videos are so helpful (y) keep shooting tutorials :)

All of your videos are top tier. Alex and Connor, I hope you are flying for my company by now!

Did he say "bleeds energy through drag"? This man scares me, he shouldn't talk about anything bleeding.

That being said, it is true indeed that swept wings increase the mach crit and the typical cruising speed is only slightly above that, because otherwise drag would increase dramatically, and therefore that is why a swept wing would allow a higher economical speed. But the critical mach is way below the maximum operating speed and therefore is not an "hard" limit itself.

This is slightly misleading. Spanwise flow only occurs significantly at higher AoA. To accelerate so much air spanwise in cruise is very inefficient as it is not creating lift, just drag. The benefit from swept wing is a thinner wing for the same wingspan. Same area as unswept, with less drag and delayed Mach transition from the lower chord thickness. Also less tip losses as flow near the tip has a lower spanwise pressure gradient. Yes the textbooks talk about spanwise flow, but look at the wind tunnel flow visualizations.

I kind of agree with all being said, but I wouldn't mention the critical mach number. In reality most jets operate above mach crit at normal cruising speed. That is the reason for the "mach trim" being installed, to compensate for the pitch down moment when the shockwave forms over the wing and the center of pressure moves aft.

He blinked at 2:00

Wait, the Aileron loses control first in sweptback?! If I'm wrong, please correct me with reference. Here's my understanding, Isn't it the wingroot first then the wingtip. Cause the critical speed is first reached by the wingroot since it ahead of the wingtip to receive the incoming air. So it will stall first to have more control over the Aileron in case of a high-speed stall.

Excellent Explanation

Thank you. Needed this.

10/10 explanation

I don’t understand why the airflow over the wing would suddenly take a turn to travel perpendicular to the wing. Also, I don’t get how the air traveling in a different direction makes the air travel slower. I also can’t find a simple answer to what spanwise flow is. Every video just says the same thing without actually explaining how it’s happening

Thnaks a lot for great teaching technique.

Very informative, keep up the great work and thanks!

my gosh, I love engineering this is so fun lol

I thought that the point of swept wings was to keep longer wings from hitting the high pressure air in the shock cone caused by your nose. Maybe that is a secondary reason for swept wings.

Subscribed:) clear and easy to understand

This dude scares me

I've always wanted to know why modern airliners have a trailing edge that is roughly perpendicular to the fuselage initially, then sweeps back at a certain point (say for example sweeps back after the inboard aileron)

so is this different to a small light aircraft where the root tends to stall first, on sweptback wings the tip stalls first? how is in terms of losing some aileron/roll control?

very good explanation

I know slats and flaps, but what are 'slots'?

Why "only chordwise flow accelerates"? The total flow over the wing doesn't "know" if it's normal to the leading edge or not, right? I know this is fact, but I just can't understand why.

Was DC3 1936 the first swept wing produced aircraft?? Yes, or no??

Phrases like "make the wing think we are flying slower". Or "makes the wing feel like its..." Are very odd. Wings are not sentient. :)

Can you tell us about the lateral and longitudinal stability of sweepback wings?

Great video thanks!

Why don't make more flat wings to avoid the supersonic flow?

I thought winglets where used to reduce vortex and therefore reduce drag.

Interesting. So it's actually a bad wing design aside from approaching the speed of sound?

So why the wing tips?

what effect the wing sweep on the stability lateral

when you take a picture for your cv, standing slightly sideways ads dynamic and looks good. but when you talk to someone you would never stand like this. its offputting.

that was interesting and all but someone really needs to mist that guys eyes with water before they dry and crack like porcelain

but why aren't airliners wings swept forward?!

0:05 he blinks

wrong explanation.. mixed high speed and low speed.. not clear either.

You are the Best Tank you

y he look at me like dat o_o

I need that looks

please just blink once please

nice!

this guy barely blinks