Why Stall Speed if it's all about Angle of Attack?!

Why does your flight Instructor talk about stall speed, when speed has no impact on stall?
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[@awesome3006]

Doing a presentation over stalls currently and I wanted to say that this has helped a whole bunch in explaining how stall speed works and you can stall at any airspeed! Thanks for the helpful video!!!

[@leonardobasso6565]

the mathematical explanation made it super super clear. Thanks a lot!!

[@mep_pilot]

Looking at various scenarios with the Lift equation in mind helped me tremendously in my understanding of stalls. Thank you!

[@MerryfaceAviation]

glad I helped

[@taffy1622]

Thank you, this really helped me understand stall speed

[@MerryfaceAviation]

I'm glad it helped

[@avionlog604]

Thank you so much for mentioning AvionLog in your video! Keep up the great work.

[@MerryfaceAviation]

Of course. It's an excellent app

[@MuhammadHaris-ji8gm]

Ty

[@wumoran1]

Thanks so much for all the incredible educational content. Love your work.

[@MerryfaceAviation]

thanks :)

[@mateuszmista738]

Thank you for that! I wonder how many profesional pilots understand that by heart :)

[@MerryfaceAviation]

No worries! thankfully most do! This is usually something private pilots tend to not quite understand

[@yuvrajsinghkachhawa7263]

very very very nicely explained man, thank you < 3

[@MerryfaceAviation]

glad it helped!

[@solamigos]

Thanks for the video, it helped me better understand the concept of stall speed!

[@MerryfaceAviation]

glad it helped!

[@yosefjabbour6530]

Great video. Thanks, Love yaaa

[@akhtargee]

Beautifully explained "Stall". Thanks for the video!

[@MerryfaceAviation]

glad you liked it!

[@user-yo9ti2us8k]

Great explanation!

[@MerryfaceAviation]

Glad it was helpful!

[@mukuhlanitapiwa5887]

thank you for making it easy to understand

[@MerryfaceAviation]

I'm glad this helped you

[@sharuniharajendran1541]

You are amazing Thankyou!😍

[@MerryfaceAviation]

thank you for watching. glad it helped

[@elsamarjanen7841]

Thanks for the video! But umm... What if airplane is on ground effect? Is stall speed then higher?

[@MerryfaceAviation]

That's a really good question. I'm going to think through this one here, not sure if it's the correct answer though. When the aircraft is in ground effect, it will experience less drag, and it should also experience a form of cushioning effect, which would mean that it needs less lift to stay level... So I believe that in ground effect the stall speed would be lower as the aircraft does not need as much lift to maintain level over the ground. I could be wrong though

[@Mj-kc5jz]

Thanks a lot man thank you

[@jamescaley9942]

Say you slow down but do not increase the AoA? Yes you are losing lift but that is not the same as a stall. At what speed do you stall?

[@MerryfaceAviation]

well in that case you would descend, no increase in AoA with a reduction in airspeed would mean just that. Look at videos of the hammerhead aerobatic maneouvre. Your speed reaches sub 5kt, but the stall horn never goes off, because the critical angle of attack is never exceeded

[@hmabboud]

Thank you! You are good at explaining and presenting. But I have one comment. @6:32 As the weight is smaller than the lift?

[@moradi3597]

Hi thanks for video I have one question Higher stall speed is good? What's the difference between higher stall speed and lower stall speed? Thanks

[@asmith8896]

nobody answered you but im suspecting by now in your training you have solved this, in case not..well higher stall speed is not the best when landing usually you want to come in at the POH published speed..all it means when we say higher stall speed is the aircraft needs to fly faster often because of surplus weight so instead of landing say a c172 at 55kts you need to fly in land at maybe 60kts (flying faster to maintain lift because of excess weight in this case)..conversely to land with lower stall speed we tend to add flaps which of course slows the aircraft down due to drag..slow stall speed is when the aircraft stalls with a lower number on your ASI where as a higher stall speed will be a higher number..coming in fast.One more scenario..you going flying heavy for some reason..you have a near miss with another aircraft you quickly had to turn right and you hit a big bank angle which also increases stall speed..double whammy..suddenly you are stalling at 65KTS and you wonder how the hell that happened..well, your stall speed was greatly increased.

[@MaertinRays]

Great video

[@MerryfaceAviation]

thanks man!

[@naveenv4227]

Hi, Your video is very much informative and I have a doubt in that, let say max critical angle of attack is 12° for instance and if I reduce the speed of aircraft I need to increase angle of attack to maintain the lift equal to weight, let say I reduce the speed much more and I further increase angle attack and now since aircraft is much slower, air molecules hitting wings won't be having much energy so is there a chance of boundary layer Speration before reaching critical angle of attack, which leads to stall. Please explain this factor to me and also explain how to approach this type of problem in equation.

[@MerryfaceAviation]

Hi Naveen. The equation only applies to when the wing is producing lift. Going beyond the critical angle of attack will result in the stall. At the point the aircraft is no longer producing lift and the equation is therefore not relevant. That's the basis behind this video.

[@naveenv4227]

@@MerryfaceAviation actually I think I didn't convey my doubt properly . Let me try to explain once more. If we reduce the speed so much and increase the angle of attack more but still we are within the limit of critical angle of attack . But aircraft moving through air at low speed where is there a chance of boundary layer separation much before the critical angle attack and leading to stall since air won't have enough energy to stay attached to boundary layer?

[@MerryfaceAviation]

@@naveenv4227 significant boundary layer seperation occurs at the stall speed. It's a vital part of the definition of the stall. If you keep reducing your speed and maintain close to the highest angle of attack before alpha crit, you'll still produce lift, you just won't be able to maintain level flight.

[@naveenv4227]

@@MerryfaceAviation thank you for the clarification. This means a lot.

[@MerryfaceAviation]

@@naveenv4227 no sweat

[@user-re2ko4et4o]

How will stall speed change if entering the ground effect area?

[@MerryfaceAviation]

good question! Well. ground effect reduces drag so.... :)