Find out how wing sweep increases your critical mach number in this crash course episode.
Пікірлер: 71
@MultiMates77 жыл бұрын
i feel like hes staring into my soul
@Vishalsingh-zg4xl4 жыл бұрын
🤣🤣
@artsmadz14273 жыл бұрын
😅😳😱🤣
@plantinglife9515 Жыл бұрын
😄😢😄😄
@stephenta4u Жыл бұрын
😅
@mohit.bandbe11 ай бұрын
😂
@whelanvidswhelanvids1500 Жыл бұрын
Thanks for explaining something my ATPL book couldn’t do over 4 pages 😂
@R4NJ3R5 жыл бұрын
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.
@linekrongaard46747 жыл бұрын
Did he ever blinked, I felt uncomfortable. But great video anyway
@benhaley98115 жыл бұрын
He's looking into your soul! He sees weakness
@bharaniselvanb45675 жыл бұрын
He didn't blink once.
@FlyNAA3 жыл бұрын
"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.
@vallejiano3 жыл бұрын
I still want to know if spanwise and chordwise perform around (above and under) the entire wing. Think above would be the answer.
@Harryschannel-yq7xu8 жыл бұрын
Crash course is a very good channel, helps me a lot, and even a 5 year old can understand rocket science from this
@ChrisZoomER Жыл бұрын
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.
@dado2i4 жыл бұрын
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.
@cnabdrinmntiq69338 жыл бұрын
your speech and accent are so easy to understand and your videos are so helpful (y) keep shooting tutorials :)
@Aviyaytor2 жыл бұрын
All of your videos are top tier. Alex and Connor, I hope you are flying for my company by now!
@tkgus24084 жыл бұрын
Did he say "bleeds energy through drag"? This man scares me, he shouldn't talk about anything bleeding.
@nathan2friendly8874 жыл бұрын
Especially when he stares at your soul the way he does
@TheMarcellification9 жыл бұрын
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.
@skylabsTV8 жыл бұрын
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.
@TheMarcellification9 жыл бұрын
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.
@haoliyin5824 жыл бұрын
He blinked at 2:00
@FlyNAA3 жыл бұрын
Nice, you got me
@maxkhunglo62118 ай бұрын
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.
@DouglasSantos-kf6rd8 жыл бұрын
Excellent Explanation
@AviAeroAsis5 жыл бұрын
Thank you. Needed this.
@benhickmott79108 ай бұрын
10/10 explanation
@brandonsg13676 ай бұрын
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
@tk7548 жыл бұрын
Thnaks a lot for great teaching technique.
@snelle_tomos7 жыл бұрын
Very informative, keep up the great work and thanks!
@superdahoho7 жыл бұрын
my gosh, I love engineering this is so fun lol
@sheeplord49763 жыл бұрын
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.
@babybabybirdbird9 жыл бұрын
Subscribed:) clear and easy to understand
@aviator38153 ай бұрын
This dude scares me
@wildzach6 жыл бұрын
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)
@harryesteves3872 жыл бұрын
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?
@cypriotpilot9 жыл бұрын
very good explanation
@foxtrotsim80549 жыл бұрын
I know slats and flaps, but what are 'slots'?
@Boldmethod9 жыл бұрын
FoxtrotSim - Slots are permanently open slats. Sometimes "slots" are called "fixed slats," and sometimes "slats" are called "retractable slots." Slots were an early development on aircraft wings, and you can find full wing length slots on STOL aircraft (like the Zenith). Partial wing slots were used on aircraft like the Lockheed Hudson (en.wikipedia.org/wiki/Lockheed_Hudson) to keep airflow attached at the wingtips during a stall - causing the aircraft to stall from the root out.
@foxtrotsim80549 жыл бұрын
Oh okay, I got it, thanks.
@nxtvctm8 жыл бұрын
Don't forget 'Sluts', they are usually used for pressure relief and usually on the weekends when the there is an increased flow of alcohol and or money.
@jefftreseder43587 жыл бұрын
and they usually have slits too.
@shortsprings5 жыл бұрын
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.
@feetgoaroundfullflapsC5 жыл бұрын
Was DC3 1936 the first swept wing produced aircraft?? Yes, or no??
@whataboutredlorry8 жыл бұрын
Phrases like "make the wing think we are flying slower". Or "makes the wing feel like its..." Are very odd. Wings are not sentient. :)
@gummel826 жыл бұрын
Can you tell us about the lateral and longitudinal stability of sweepback wings?
@marshallhyasi62135 жыл бұрын
Great video thanks!
@vayar89087 жыл бұрын
Why don't make more flat wings to avoid the supersonic flow?
@lewisdsd7 жыл бұрын
I thought winglets where used to reduce vortex and therefore reduce drag.
@OLGMC7 жыл бұрын
Lewis DSD they are, but that has nothing to do with this video?
@danc32298 жыл бұрын
Interesting. So it's actually a bad wing design aside from approaching the speed of sound?
@palonazo7 жыл бұрын
It's the best we have. Swept back super critical wings and mach trimmers are the only way we can now fly fast, without our airplanes looking like flying triangles.
@wizbangFLL4 жыл бұрын
So why the wing tips?
@user-lq4oo5lo8p8 жыл бұрын
what effect the wing sweep on the stability lateral
@skaterfugater7 жыл бұрын
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.
@jakeool2 жыл бұрын
that was interesting and all but someone really needs to mist that guys eyes with water before they dry and crack like porcelain
@sufysprojects26897 жыл бұрын
but why aren't airliners wings swept forward?!
@ikichullo5 жыл бұрын
0:05 he blinks
@ChiDraconis5 жыл бұрын
Detail person u-r
@FlyNAA3 жыл бұрын
Quality over quantity!
@JacobTJ18 жыл бұрын
wrong explanation.. mixed high speed and low speed.. not clear either.