Excellent explanation! I was also a Grade 1 instructor and now I'm a B767 captain. A point of interest, the advanced flaps such as Fowlers, and leading edge slats, also increase the surface area of the wing and so increase the lift
Totally spot on ... For advanced learners l'd like to add ... Flaps change wing camber & above all wing chord. Meaning increasing angle of attack (AOA) by some 5 degrees despite plane staying in same orientation. Plus control surfaces lose authority at slow speeds &n controls feel mushy
As a licensed flight instructor (and rc modler) I must say, great video. You clearly have a good understanding of flight characteristics and can demonstrate/explain it very well. More of these kinds of videos would kick ass. Ok bye.
I don't hobbie in RC aircraft but this is obviously applicable to full sized aircraft. Very clear and concise video with a great host. Thanks very much!
Fantastic Explanation! I am a multiengine and instrument rated private pilot and I have never heard such an in depth explanation about flaps before even though I have gone through years of study. Great job! Keep the videos coming. Jake from the USA.
If you think about it, a propeller is nothing more than a rotating wing. It produces lift to create thrust. Bernoulli says that the low pressure area ahead of the prop sucks the plane forward to produce thrust. Newton says the the air is accelerated backward to produce thrust in the same way a jet engine does. Which is true? Both.
The Newtonian component as described around 5:18 violates the law of causality. The theory is that because the air molecule goes down AFTER passing by the wing, it ... goes back in time and pushes up on the wing? That has cause and effect backwards. An air molecule going down AFTER the plane has already gone by can't push on the wing. The lift applied to the wing has to cause the air molecule to be directed downward later. Simply because a cause always happens BEFORE the effect. So the two components are the Bernoulli portion and the AoA portion. Anything that happens later, AFTER the air has passed the wing, has to be an effect, not a cause. Folks fall into the "air goes down afterwards" mistake when they realize that the Bernoulli component can't be the only component - some planes can fly inverted. There's no need to fall into that though - you can recognize that inverted flight requires AoA. It requires that the air be forced down WHILE in contact with the wing, because the wing is angled, because the wing is positioned as a wedge while in inverted flight.
Simply excellent Bruce! I enjoyed this very much. I just don't see how anyone could give this a thumbs down. Free and accurate information presented well. Probably five of the "Old Sore Heads" just pouting.
lastly im glad you are making these videos. I am also glad they are simple as most people wont care about the higher complexity stuff. Just try and do a little refresher research to make sure the simplification is not misleading
Bruce you gave a great presentation today on flaps. I had read an article last weekend about flaps and your pictorial explanation helped my understanding even more. Great job!
A BIG BIG BIG THUMB UP !!! - I really enjoy your videos, as a X-Plane Sim Pilot, and real life Skydiver with over 200Jumps, this is total perfectly brought to the point. Will be watching your videos in future! Keep things going on, like this! Cheers from Germany.
Excellent introduction to lift and flaps Bruce. Well done. yes, I know that there are assumptions and a few people are pointing those bits out. BUT you are doing a basic introduction. And that is the point. Clear, concise and fun. Congratulations and all the best, Lincolnshire Rose.
Disregard my last comment. It wasn't your video but my computer. I tried again and it worked really good and was able to watch your video. Thanks for taking your time to share your knowledge with your subscribers.
Bruce, thanks! I have been trying to figure out why my hurricane would pitch nose down when I deployed the flaps! Now I know what I need to do to get the plane to fly when using them. Great vid as always!!!
I appreciate that you at least mention that the Bernulli effect as a explanation of why air-planes fly is at least disputed. The Newtonian explanation makes so much more sense and I'm convinced it is responsible for the majority of the lift created.
Really well done. Here's one for you to consider covering. When I did a brushless upgrade to my HZ Super Cub I noticed that the new engine mounting bracket (purchased from the HZ upgrade site) added more thrust angle. I've always wondered why the brushless required a more extreme thrust angle than the stock brushed motor. Maybe just a simple overview of thrust angle would do the trick? Anyway, just a thought. I loved this one!
Brilliant informative video on lift theory and flaps, particularly pitch difference between low wing and high wing configurations, should be compulsory viewing for all new rc pilots.
Aaron, The change in airflow over the horizontal stabilizer (HS) with flaps deployment is the largest determinant of how the airplane will react. An airplane with a HS that is lower than the wing will generally have a nose up tendency, where an airplane with a HS that is higher than the wing will generally have a nose down pitching tendency.
Great explanation Bruce, particularly since you spoke about the Newtonian part of it. The explanations I used to read as a kid really confused me as they made out that lift is only created by a wing with an airfoil shape, but I had model aircraft with no airfoil's or symmetrical airfoil's (control liners). When I studied engineering I learned that the Bernoulli effect is basically a statement of the law of conservation of energy.
Mostly correct but not entirely. As an ATP, Flight Instructor and RC pilot I have never had an aircraft need up elevator when deploying flaps. Theory on a white board is technically correct, but the amount of lift generated on either a high or low wing has more effect than the drag portrayed in this presentation behind the flaps. In both instances, in real flight, the aircraft with rise and need down trim to counter it.
Wait a minute. I thought extra lift with a flap generates extra lift behind a CG and that causes pitching down moment. I am an inactive full scale pilot and I believe I had to trim up as flaps go down whether it was a low wing Piper or high wing Cessna. Quickly tried MSFS. C172 definitely gives huge pitch up. Mooney showed minimal change, and Learjet gives huge pitch down. I always use flaps as it costs nothing extra, and 3D planes pitch up because those big control surfaces adds extra lift in front of CG is how I've been understanding it.
As a fixed wing private pilot I knew there were 2 kinds of lift but only the name of the Bernouli lift. I always called the other one "deflection lift" when the flaps were down. The best way to demonstrate both is to take a narrow strip of paper and hold it in front of your mouth. Blowing across the top of the paper gives you Bernouli Lift and blowing below the paper gives you Newtonian Lift. A clean wing is all Bernouli Lift and as you add flap you get less of that and more Newtonian Lift with more drag and therefore slower speed / lower stall speed for landing.
I'm trying to build a plane in ksp, and this really helped. I had no clue what flaps were for, or even what direction to angle them before watching this video.
Hello Bruce! Thumbs up! ! Nice Vid! Well here an idea for one of the -hopefully upcoming- next ones: May it would be nice to talk about engine (side-) thrust and down thrust and also the engine torque on "normal" planes and flying wings (pusher) and the adjustment of both angles for a straight smooth flight??? Kind regards from Germany
Hi Bruce, Wasn't sure I'd learn anything, but I like your vids and decided to watch the new 'teaching' segment. I never thought about position of the wing and center of gravity and resulting pitch when flaps are deployed. So I did learn something. Thank you.
We are not asking for a physics dissertation here but an understanding that works. Your explanation gets the point across very well. Let the egg heads prepare a complex video with angle of attack and other variables that will put viewers to sleep. This certainly helped me to understand the concepts he was trying to convey and I thank him for it.
Nice video. I would describe drag as any force acting opposite direction as thrust -- a newtonian vector rearward. In the case of flaps, I believe the air resistance on the flaps themselves to be a larger drag force than the turbulence you describe.
Bruce, Very well done. I really appreciate your knowledge of the science of flying rc planes. I am very interested in what makes our planes fly and why. You have done a really good job in explaining and breaking it down for us simple minded people to understand. I would like to see a video on the differences of pusher and puller motor ? props and there benefits and down sides. Thanks again and keep up the good work!!! Scott
hi , bruce just my idea , i had always understood deploying flaps increases the area of wing , and as lift equation suggests increasing the area of wing increases the lift of an a/c.
Outstanding as usual! I'm grateful for your efforts - thanks so much. BTW, is there a way one can set up an AoA system for FPV using air speed sensors or something? Cheers!
I learned a lot from Mr Bernoulli when I started messing with carburettors 40 years ago, and more when I began making and flying kites from about 25 years ago. So I'm only too happy to recognize him as one of the family along with my best friend Albert E. They both solve the airplane on the conveyor belt question.
Great video, I am just getting back into model airplanes and my Dynam Hawksky 4 CH motor glider needs flaperons, it glides so well, I need an acre and a half just to land ! Your whiteboard and ability to hold 4 colored markers while talking and drawing is remarkable. I know I needed flaps, I can now explain why to someone else, that is the lesson learned today.
Thank you. I learned new things today. I've always know how wing works with Bernoulli principle but for the Newton principles, it's the first time for. Very precise and clear explanation. Thank you again for this great video.
good stuff Bruce, and yes the Jabiru pitches up and slows down when I lower the flaps, which is gooood cos I want both on the base leg...then when you get to turn onto final nose down 70 knts all is good....60 knts over the fence and land..magic stuff.
KUDOS Bruce! - you take a boring & usualy hard to grasp concept for some - & make it not only "technically correct" but also ( and most of all ) - FUN! and really easy to follow as well. I hd a flight instructor years ago at Bankstow nwhere I learned to fly 152's & he had a very similar style to you. He was always booked out because he was so damned easy to learn from - just like YOU. I think you might really be ON to something here..
Excellent explanation! I was also a Grade 1 instructor and now I'm a B767 captain. A point of interest, the advanced flaps such as Fowlers, and leading edge slats, also increase the surface area of the wing and so increase the lift
Am excited to hear that you are a captain
Totally spot on ... For advanced learners l'd like to add ... Flaps change wing camber & above all wing chord. Meaning increasing angle of attack (AOA) by some 5 degrees despite plane staying in same orientation. Plus control surfaces lose authority at slow speeds &n controls feel mushy
since the presentation begin with a FLAWED visual aid, 'spot on' is not what i would Call it.
As a licensed flight instructor (and rc modler) I must say, great video. You clearly have a good understanding of flight characteristics and can demonstrate/explain it very well. More of these kinds of videos would kick ass. Ok bye.
Absolutelly impressive, Mr. RC! I am also an aviation teacher here in Brazil and you Sir will be my inspiration! Great class!
I don't hobbie in RC aircraft but this is obviously applicable to full sized aircraft. Very clear and concise video with a great host. Thanks very much!
Easily best teacher I've ever seen.. been in school for a long time.
Fantastic Explanation! I am a multiengine and instrument rated private pilot and I have never heard such an in depth explanation about flaps before even though I have gone through years of study. Great job! Keep the videos coming. Jake from the USA.
How did I miss the Newtonian component all these years? It was right in front of me but I never had someone explain it so well.
Its ok, you're not the only one.
SYMMETRIC AIRFOILS & FLAT PLATE AIRFOILS work on ONLY NEWTONIAN LIFT PRINCIPLE ..NO FANCY BERNOULLI LIFT
Having only taken up flying on retirement at age 75 I have a lot to learn .your videos put things simply so that my senile brain can understand .
If you think about it, a propeller is nothing more than a rotating wing. It produces lift to create thrust. Bernoulli says that the low pressure area ahead of the prop sucks the plane forward to produce thrust. Newton says the the air is accelerated backward to produce thrust in the same way a jet engine does. Which is true? Both.
The Newtonian component as described around 5:18 violates the law of causality. The theory is that because the air molecule goes down AFTER passing by the wing, it ... goes back in time and pushes up on the wing? That has cause and effect backwards. An air molecule going down AFTER the plane has already gone by can't push on the wing.
The lift applied to the wing has to cause the air molecule to be directed downward later. Simply because a cause always happens BEFORE the effect.
So the two components are the Bernoulli portion and the AoA portion. Anything that happens later, AFTER the air has passed the wing, has to be an effect, not a cause.
Folks fall into the "air goes down afterwards" mistake when they realize that the Bernoulli component can't be the only component - some planes can fly inverted. There's no need to fall into that though - you can recognize that inverted flight requires AoA. It requires that the air be forced down WHILE in contact with the wing, because the wing is angled, because the wing is positioned as a wedge while in inverted flight.
Simply excellent Bruce! I enjoyed this very much. I just don't see how anyone could give this a thumbs down. Free and accurate information presented well. Probably five of the "Old Sore Heads" just pouting.
You did a fantastic job. Explained two reasons for lift, and drag component of flaps. Score of 100 out 100. Need teachers like you.
lastly im glad you are making these videos. I am also glad they are simple as most people wont care about the higher complexity stuff. Just try and do a little refresher research to make sure the simplification is not misleading
Great video. I learned that I had the wrong idea about flap deployment, but now I got the idea. Thanks!
Bruce you gave a great presentation today on flaps. I had read an article last weekend about flaps and your pictorial explanation helped my understanding even more. Great job!
I know this is not a new video, but I found it very helpful to confirm what I had already suspected. Thank you Bruce!
A BIG BIG BIG THUMB UP !!! - I really enjoy your videos, as a X-Plane Sim Pilot, and real life Skydiver with over 200Jumps, this is total perfectly brought to the point. Will be watching your videos in future! Keep things going on, like this!
Cheers from Germany.
simple yet concise. much better understanding now thanks
I'm a beginner and this video helped me a lot. It's perfect for people like me.
Your real good teacher thanks.
Dave Flysitall he needs better teachers
@@grizzmcsammiches6136 is
*You’re a
and you’re welcome 😉
best
Excellent introduction to lift and flaps Bruce. Well done. yes, I know that there are assumptions and a few people are pointing those bits out. BUT you are doing a basic introduction. And that is the point. Clear, concise and fun. Congratulations and all the best, Lincolnshire Rose.
Another great video! Making a complex topic easy to understand.
Grade 6 student here. I was extremely confused by this topic, thank goodness I came across your channel!
Fantastic new segment. Great explanation.
Disregard my last comment. It wasn't your video but my computer. I tried again and it worked really good and was able to watch your video. Thanks for taking your time to share your knowledge with your subscribers.
Great video. Nice and simple explanation and I've gains a better understanding than I had.
Bruce, thanks! I have been trying to figure out why my hurricane would pitch nose down when I deployed the flaps!
Now I know what I need to do to get the plane to fly when using them.
Great vid as always!!!
I appreciate that you at least mention that the Bernulli effect as a explanation of why air-planes fly is at least disputed.
The Newtonian explanation makes so much more sense and I'm convinced it is responsible for the majority of the lift created.
Congratulations! very good explanation
Really well done. Here's one for you to consider covering. When I did a brushless upgrade to my HZ Super Cub I noticed that the new engine mounting bracket (purchased from the HZ upgrade site) added more thrust angle. I've always wondered why the brushless required a more extreme thrust angle than the stock brushed motor. Maybe just a simple overview of thrust angle would do the trick?
Anyway, just a thought. I loved this one!
Brilliant informative video on lift theory and flaps, particularly pitch difference between low wing and high wing configurations, should be compulsory viewing for all new rc pilots.
now i am learning more then i thought, which was nothing. great videos. love them
Aaron,
The change in airflow over the horizontal stabilizer (HS) with flaps deployment is the largest determinant of how the airplane will react. An airplane with a HS that is lower than the wing will generally have a nose up tendency, where an airplane with a HS that is higher than the wing will generally have a nose down pitching tendency.
more please Bruce as a newbie found it interesting and informative and for a man of more advanced years and into this hobby for the first time
Thanks for making it easy to understand for a noob to rc planes!
Great explanation Bruce, particularly since you spoke about the Newtonian part of it. The explanations I used to read as a kid really confused me as they made out that lift is only created by a wing with an airfoil shape, but I had model aircraft with no airfoil's or symmetrical airfoil's (control liners). When I studied engineering I learned that the Bernoulli effect is basically a statement of the law of conservation of energy.
Mostly correct but not entirely. As an ATP, Flight Instructor and RC pilot I have never had an aircraft need up elevator when deploying flaps. Theory on a white board is technically correct, but the amount of lift generated on either a high or low wing has more effect than the drag portrayed in this presentation behind the flaps. In both instances, in real flight, the aircraft with rise and need down trim to counter it.
great job Bruce. I think u need to talk more about the win. things like angle of attack
You teach like you invented aeroplane. I will like to make you my mentor. Great job done.
Fantastic video!!!! Well done! Greetings from a student pilot from Germany!
Excellent Bruce
Very good tutorial, keep good work up. I will certainly send the link to a couple of my friends thank you.
Gavin
Very well done Bruce.
Thank you a lot, please keep making videos of HOW IT WORKS. Cant wait till you will start explaining the electronics, please do not miss anything.
I hope my teacher in aviation when I grow up will be like you, you're really good and I got the lesson fast!
I knew very little about how flaps and how other items on an airplane worked but this presentation was very very good and understandable to me.
Well said, your center of gravity comparison was very enlightening, thank you.
yes!
Then why didn't he said about planes with a wings AT the center of mass?
Do they exist?
Wait a minute. I thought extra lift with a flap generates extra lift behind a CG and that causes pitching down moment. I am an inactive full scale pilot and I believe I had to trim up as flaps go down whether it was a low wing Piper or high wing Cessna. Quickly tried MSFS. C172 definitely gives huge pitch up. Mooney showed minimal change, and Learjet gives huge pitch down. I always use flaps as it costs nothing extra, and 3D planes pitch up because those big control surfaces adds extra lift in front of CG is how I've been understanding it.
As a fixed wing private pilot I knew there were 2 kinds of lift but only the name of the Bernouli lift. I always called the other one "deflection lift" when the flaps were down.
The best way to demonstrate both is to take a narrow strip of paper and hold it in front of your mouth. Blowing across the top of the paper gives you Bernouli Lift and blowing below the paper gives you Newtonian Lift. A clean wing is all Bernouli Lift and as you add flap you get less of that and more Newtonian Lift with more drag and therefore slower speed / lower stall speed for landing.
Great video. You make it all seem very easy to understand. Thank you
You sir are a fine instructor! I like both of your channels.
I'm trying to build a plane in ksp, and this really helped. I had no clue what flaps were for, or even what direction to angle them before watching this video.
Good explanation of the basics.
Hello Bruce!
Thumbs up! !
Nice Vid! Well here an idea for one of the -hopefully upcoming- next ones:
May it would be nice to talk about engine (side-) thrust and down thrust and also the engine torque on "normal" planes and flying wings (pusher) and the adjustment of both angles for a straight smooth flight???
Kind regards from Germany
amazing...
its been a while but you had been teaching and explaining RC plane to us.
Good job and thank you for the hard effort.
Both are awesome. Thank goodness for variety!
Super helpful, as an aspiring aviation simulator and someone going for my PPL license I greatly appreciated this.
Great instruction and illustration Bruce.Thanks!
Hi Bruce,
Wasn't sure I'd learn anything, but I like your vids and decided to watch the new 'teaching' segment. I never thought about position of the wing and center of gravity and resulting pitch when flaps are deployed. So I did learn something. Thank you.
We are not asking for a physics dissertation here but an understanding that works. Your explanation gets the point across very well. Let the egg heads prepare a complex video with angle of attack and other variables that will put viewers to sleep. This certainly helped me to understand the concepts he was trying to convey and I thank him for it.
Semih Tok
Excellent. You are a great teacher.
excellent video! what is the other theory that explains the lift and that you mentioned in your video, please?
I've been confused by how flaps work on planes,finally got an answer after 2 years of looking
Just started working at an aerospace company. First day was deburring clutch plates for these flaps. So awesome.
Great video, has been much needed!
Nice video. I would describe drag as any force acting opposite direction as thrust -- a newtonian vector rearward. In the case of flaps, I believe the air resistance on the flaps themselves to be a larger drag force than the turbulence you describe.
Very nice Bruce; Looking foreward to many more of these.
Fantastic Explanation.
Bruce, Very well done. I really appreciate your knowledge of the science of flying rc planes. I am very interested in what makes our planes fly and why. You have done a really good job in explaining and breaking it down for us simple minded people to understand. I would like to see a video on the differences of pusher and puller motor ? props and there benefits and down sides. Thanks again and keep up the good work!!!
Scott
Thanks for the video. I always learn something new watching them.
you are better than my own aircraft instructor explanation ...thank you teacher
Sir, perfect explanation. I am starting my training in half a year from now and I am glad i found Your content. Hope you are doing well!
Great video very informative.Thanks.
great info,thank you.and a big thanks for your comments on our site.
Thanks Bruce. I'm 56 and new to this that was great.
Loud & very clear explanation. Thank you for sharing..
Great video and thanks for the explanation.
This video is more than adequate to help people understand flap use.
hi , bruce just my idea , i had always understood deploying flaps increases the area of wing , and as lift equation suggests increasing the area of wing increases the lift of an a/c.
I love your videos. Keep them up.
Wonderful Teacher!!! Very nicely explained!!! Thanks a lot!!!
Bruce, very nice video. Keep up the good work.
You're the best my friend! We are learning so much from you!
Outstanding as usual! I'm grateful for your efforts - thanks so much. BTW, is there a way one can set up an AoA system for FPV using air speed sensors or something? Cheers!
great vid Bruce.Looking fwd to some more.
i now understand flaps ,thanks to you , keep up the very good work you do sir , all the very best .
Now you made clear on how lift work on that type of wing , now I am confused on how a symmetrical wing produces lift
great video sir this got me started in the right direction
You are the best , you really help us alot . ( Best wishes from Dubai )
I'm voting for "white board Wednesday".
Love your videos by the way.
I learned a lot from Mr Bernoulli when I started messing with carburettors 40 years ago, and more when I began making and flying kites from about 25 years ago. So I'm only too happy to recognize him as one of the family along with my best friend Albert E. They both solve the airplane on the conveyor belt question.
Thanks to the new Android TH-cam app, I got a push message that your new video was up! Watching it now :-)
Great video, I am just getting back into model airplanes and my Dynam Hawksky 4 CH motor glider needs flaperons, it glides so well, I need an acre and a half just to land ! Your whiteboard and ability to hold 4 colored markers while talking and drawing is remarkable. I know I needed flaps, I can now explain why to someone else, that is the lesson learned today.
Thank you. I learned new things today. I've always know how wing works with Bernoulli principle but for the Newton principles, it's the first time for. Very precise and clear explanation. Thank you again for this great video.
Very clear explanation.
I love this theory and praxis explanations! It´s like going again to school or university :D
Perfect teaching for me. Is simple to understand! Thanks young man!
Sir, pls more of such theories videos !!! This was really helpful !! we want more of "THEORY TUESDAYS"
Thanks Bruce, excellent tuition!
Excellent examples, especially on the above wing as compared to the lower wing craft types., Thank you.
Another great video. Clear explanation. I won't need to look anywhere else, I think I've got it. Thanks for taking the time.
good stuff Bruce, and yes the Jabiru pitches up and slows down when I lower the flaps, which is gooood cos I want both on the base leg...then when you get to turn onto final nose down 70 knts all is good....60 knts over the fence and land..magic stuff.
KUDOS Bruce! - you take a boring & usualy hard to grasp concept for some - & make it not only "technically correct" but also ( and most of all ) - FUN! and really easy to follow as well. I hd a flight instructor years ago at Bankstow nwhere I learned to fly 152's & he had a very similar style to you. He was always booked out because he was so damned easy to learn from - just like YOU. I think you might really be ON to something here..