Ground Effect: Boldmethod Live

[@erl2nd]

Thank you so much for your presentation, as a new pilot I am struggling with landings and trying to comprehend what the problem is has been difficult. After watching your video I have gained a new perspective which involves not being relaxed and holding the yolk incredibly tight reduces my ability to correctly enter ground effect and transition from round out to flare I believe you nailed it with the reflection upon how a very tense pilot does not have the relaxed demeanor to finesse the controls as opposed to a rigid grip which inflicts the slightest thump from turbulence straight into the controls I'm landing at a airport notorious for turbulence due to trees on one end and a bluff on the other end and therefore it is critical I learned to finesse and isolate the yolk from movements translated from turbulence straight into my rigid grip onto the yolk. I hope I'm right I'm desperate but thank you so much for such a well thought out presentation You're awesome!

[@Mgl1206]

11:00 minutes in and I already have an idea of what ground effect is. Excellent explanation.

[@massimodalessandro9259]

The best aerodynamic physics lesson videos on KZbin I’ve ever seen. Puts important emphasis on what your aircraft is going through. Thank you Boldmethod and Alex!

[@Boldmethod]

Thanks for watching Massimo!

[@bruceme101]

You're right that air is not compressing. But compressibility starts at about cruise speeds, you don't need supersonic speeds.

[@uroscadez]

great stuff... I finally get it. thank you!

[@TheArabPilot]

I'm still confused about why the vortices at the back of the wing would affect the relative wind at the front of the wing. Wouldn't relative wind come in straight at the front, THEN as they interact with the vortices, they go downward?

[@lordofthebewbs2597]

Yeah, I was under the impression that induced drag was because the lift is perpendicular to the chord line of the wing and as AOA increases the lift vector applies more and more towards the drag force. Hence the basic power curve chart. I fail to see how vortices created would have any effect on the relative wind to the airfoil in practical application. Am I missing something?

[@mallardtv3733]

So if newtons third law explains that since air is deflected down and back from the trailing edge there is an equal and opposite reaction force upward and forward, then why does the effect of induced drag that further bends the downwash downward not result in the creation in more lift. In theory air is being deflected more downwards and would that not therefore mean the equal and opposite reaction to the downward directed air be upwards even more? I dont think induced drag and wing vortices increase lift, but this logic tells me it does. Where am I going wrong? I must be misunderstanding something

[@adamcorby804]

I would imagine a bi-plane like a Pitts complicates things a bit but the same general principles apply?

[@rehoboth_farm]

How would a 757 handle at 530 mph at an altitude of about 20 feet?

[@rehoboth_farm]

@William W. Campbell-Shepherd IX Sure, the corkscrew manuver is 'possible'. I suppose. Executed by a guy who failed out of flight school and had never actually flown a commercial airliner? Hell, why not? It's mainly the part at the end where it would have been traveling around 20-30 feet off the deck at that speed while hitting and snapping off light poles with the wings that I call bullsh*t on. That and the smoking hole all the way through to the C ring of the pentagon on the side which was completely empty with the exception of the accounting team trying to do an audit of where a few trillion dollars went. If I were to pick something of that era to perform this manuver and do that sort of damage it would be a tomahawk cruise missile and not a 757. It's just really hard to blame a tomahawk cruise missile on a 6'7" tall Saudi Arabian prince traveling through the mountains of Afghanistan with a kidney dialisis machine. Or is it? Who knows? Maybe one of these days the rest of the video showing the 'plane' hitting will be declassified. Maybe the video from the gas station across the street will fall out of some FBI archive since the Pentagon (!!!) only had one grainy crap camera that apparently we are supposed to believe failed to capture the only attack of consequence ever carried out on the building. That will happen right after the rest of the JFK files are declassified. You know, when hell freezes over. Till then we will have to put up with being told that it is perfectly natural for 100,000 ballots marked only Joe Biden showing up in a truck at 4 am. Maybe those picture of the deceased Bin Laden will be declassifed proving that somebody was killed in that raid since they were so concerned about bringing his body back here. I call porcine copulation on the whole damned thing.

[@vaibhavdungdung3355]

Is induced drag ever useful to us in any phase of flight?

[@Boldmethod]

Vaibhav, It is useful during the flare and roundout when landing. Induced drag reduces our airspeed, slowing us down to touchdown speed. So - it would be easier to land on a point if we had more induced drag and less ground effect. At altitude, however, it just eats up fuel!

[@vaibhavdungdung3355]

Boldmethod so is ground effect only useful in only soft field landing.

[@kinghii7383]

@@vaibhavdungdung3355 induced drag can also be used to steepen your approach path, short field ops for example, where you may fly 5-10kts slower to be in the region of reverse command by adopting a slightly higher nose attitude.

[@stan8235]

Alex: I am sure this has been asked a million times, but at the risk of being repetitive, what is with the polo shirt? Or should we be sending in a clothing contribution?