Swept wings actually reduce drag at all speeds because some of the air flows along side the wing because they angle backwards much like sliding down a ramp instead of running into a wall. This also reduces lift because air flowing along side the wing doesn’t produce lift like the air flowing directly over the wing does, so swept wings are only fit for high speed flight.
I know this is 3 years old now but @4:38 I think your graph is backwards? The blue would be the elliptical planform and lift profile. The yellow does not look ellipitical, instead it looks like a smoothed corner rectangle, which is the lift profile of a rectangular wing. Oh just continued watching, it's worse than I thought, you continue on saying the elliptical plan form provides a uniform lift profile... You should make a correction announcement in a pinned comment at the least. It's very misinformative. You also say swept wings only advantage is lower transonic drag, but they have other advantages as well. They provide roll stability, the same way positive dihedral would. Swept wings then require no or less dihedral angle.
Right from the rectangular planform I had a nagging question. Does a straight wing start to stall at the root and then have the area of the stall radiate out due to the planform? I thought it was due to the typical built-in angle of incidence that is greater at the root and is reduced as it moves out to the tip by means of a long twist.
I miss an assessment of tapered wings with leading edges rectangular to the fuselage and with only the trailing edges being tapered. what's the effect on drag? and a description of the effects of foreward swept wings on drag?
Minumum sink speed wont give the longest distance on horizontal path with given altitude or time. I think there is a mistake at that point of explanation. You should check it from different sources. But anyway. Your videos are greatly appreciated. Keep doing friend.
Wish you'd explained how it might be possible to make an elliptical with benign stall characteristics and great strength. Or did R. J. Mitchell have a secret sauce unknown others before or since?
A cleverly chosen combo of camber and twist and thickness can make even a rectangular plan form give an elliptical lift profile. So it is likely camber and twist and thickness have been chosen to have better stall characteristics.
What about tapered wings that are swept, but only enough to make either the leading or trailing edges straight/perpendicular to the direction of flight?
@@SoloRenegade Yup, definitely. Camber, thickness, and twist can all effect Di and the lift profile. My response earlier was just to bring up WHY people say elliptical planforms give the lowest Di. 2D aero analysis gives that result.
@@Brandon_Tyr but you still haven't listed the Best way to reduce induced drag (well, you did indirectly I suppose). but I'm not surprised, next to no one knows about it still.
You may not have thousands of views, but I can guarantee you this is Quality Content,
Thanks so much!
Didnt age well
@@suilujraupe6504 15,371 views
😂😂 15k but not enough to match the quality of this content. Only explanation that made it easy to visualize and understand.
@@guillermobarrios8605 yep
highly underrated narrator on TH-cam for aeronautics and aerodynamics.
Very easily explained with lots of information which are actually needed. Please keep on publishing new videos on new topics. Thanks
Swept wings actually reduce drag at all speeds because some of the air flows along side the wing because they angle backwards much like sliding down a ramp instead of running into a wall. This also reduces lift because air flowing along side the wing doesn’t produce lift like the air flowing directly over the wing does, so swept wings are only fit for high speed flight.
Thanks so much for such a decent video. This is even better than what we get at the aviation academy in England.
The tapered wing is typically used with a washout airfoil design to reduce the stall and spin problems.
I know this is 3 years old now but @4:38 I think your graph is backwards? The blue would be the elliptical planform and lift profile. The yellow does not look ellipitical, instead it looks like a smoothed corner rectangle, which is the lift profile of a rectangular wing.
Oh just continued watching, it's worse than I thought, you continue on saying the elliptical plan form provides a uniform lift profile... You should make a correction announcement in a pinned comment at the least. It's very misinformative.
You also say swept wings only advantage is lower transonic drag, but they have other advantages as well. They provide roll stability, the same way positive dihedral would. Swept wings then require no or less dihedral angle.
It was a good info about wing plan forms.
thanks!
thank you for this informative and helpful video!
Good work
Great videos... 👍👍...thank you so much
What a great video, thank you
BEAUTIFUL VIDEO
Nice video. And good explanation.
I was surprised to see that delta wings weren't included in the discussion.
Thank you for posting this I just subscribed
Thank u for the video keep up man
Right from the rectangular planform I had a nagging question. Does a straight wing start to stall at the root and then have the area of the stall radiate out due to the planform? I thought it was due to the typical built-in angle of incidence that is greater at the root and is reduced as it moves out to the tip by means of a long twist.
I miss an assessment of tapered wings with leading edges rectangular to the fuselage and with only the trailing edges being tapered. what's the effect on drag? and a description of the effects of foreward swept wings on drag?
Minumum sink speed wont give the longest distance on horizontal path with given altitude or time. I think there is a mistake at that point of explanation. You should check it from different sources. But anyway. Your videos are greatly appreciated. Keep doing friend.
correct, min sink gives longest time before reaching the ground, while best L/D gives furthest distance before reaching the ground.
thansk
Wish you'd explained how it might be possible to make an elliptical with benign stall characteristics and great strength. Or did R. J. Mitchell have a secret sauce unknown others before or since?
A cleverly chosen combo of camber and twist and thickness can make even a rectangular plan form give an elliptical lift profile. So it is likely camber and twist and thickness have been chosen to have better stall characteristics.
What about tapered wings that are swept, but only enough to make either the leading or trailing edges straight/perpendicular to the direction of flight?
Swept wings
Sir how to calculate CG of swept wing please please please reply
Never.
I love you ❤️❤️
Aircrafts is not a word
3:44 "lowest possible induced drag" false
Its true in 2D flat land! Too bad no planes are 2D >.>
@@Brandon_Tyr nope, there are still other ways to reduce induced drag in 3D as well.
@@SoloRenegade Yup, definitely. Camber, thickness, and twist can all effect Di and the lift profile. My response earlier was just to bring up WHY people say elliptical planforms give the lowest Di. 2D aero analysis gives that result.
@@Brandon_Tyr but you still haven't listed the Best way to reduce induced drag (well, you did indirectly I suppose). but I'm not surprised, next to no one knows about it still.
@@SoloRenegade TBH I'm not sure what the "best" way is, or even if there is a best way.
Sir can you reply me
You sound a lot like mini air crash investigation
Aircrafts? Aircraft is singular and plural.
The plural of aircraft is NOT aircrafts. It is aircraft. Example: There were 2 aircraft on the runway in Japan, one more than is safe.