Left Turning Tendencies (Private Pilot Ground Lesson 13)

[@Malik.R74]

0:14 at high angles of attack, high power and low airspeed, the airplane wants to turn to the left and right rudder fixes the problem 0:28 torque reaction -propellor and inside parts of engine need to move to create thrust which causes a reaction. -propeller turns one direction which is the action and the reaction is the airplane to roll left -torque reaction is stronger at higher power settings -some manufactured design the left wing to have more lift at the perfect cruising speed to prevent torque reaction (older airplanes) - new airplanes they offset the engine to counteract the torque reaction with weight. It doesn’t completely stop it -most powerful at high power, low air speeds and high angles of attack 1:48 P-factor - as propellor spins it creates thrust - in straight and level flight the angle of attack in both propellers are the same and produce the same thrust -when we pitch airplane up, the downward propeller will have a higher angle of attack and more thrust and takes a bigger bite of the air which causes the airplane to yaw to the left -strongest at high angles of attack 2:43 corkscrew effect -Propellor is fast but airplane is slow -spiraling slipstream-propellor creates wind that spirals around the airplane. As the air spins around the air spin it eventually hits the left side of the vertical fin which causes it to yaw to the left. The force on the left side of the fin also causes a right rolling moment but this is offset by the torque effect -at increased speeds the air travels longer and it won’t hit the tail -it is strongest at slower speeds and high power setting 3:34 gyroscopic procession (not a left turning tendency) -propeller kind of acts as a gyroscope -when an outside force acts on a gyroscope, its subject to a result in force known as procession 3:50 -it acts 90* ahead of applied force -propeller turns to the right so if we move nose of airplane we will get a force 90* ahead of that movement -when pitching airplane up, a force pushes airplane to the right as well -this is more of a factor in tail wheel airplanes and since they have to pitch down on take off, it becomes a left turning tendency

[@josephlac1245]

Can’t afford flight school right now sadly. Been taking diligent notes with each of these lessons if the times comes that I can enroll. Also fun to learn in general. Thank you!

[@FreePilotTraining]

You’re welcome

[@suzimclendon8491]

Fun fact, you can do all of the ground school on your own (or through these videos). You only need a flight instructor to get your hours in the sky(there are plenty of instructors who are not associated with a flight school). You don’t necessarily need to go to flight school to become a private pilot. This means you would only need to pay an instructor for the flight time and the aircraft rental fee.

[@josephlac1245]

@@suzimclendon8491 that’s great to know! Thank you! I’m on video lesson 25 now and have several pages of notes so far.

[@phoonjzc]

so many things to remember.

[@kenrobba5831]

Remember “step on the gas ⛽️”. Right (GAS) pedal to hold the heading.

[@southerncrosshempoil]

Best channel on KZbin

[@samueljones7495]

I've got my first stage check soon and this is very helpful in helping me prepare. Thank you.

[@FreePilotTraining]

You’re welcome

[@l5c_on_demand761]

Thank you for your videos 🤙

[@FreePilotTraining]

You’re welcome!

[@808_murda2]

For me I say the asymmetrical prop load, spiraling slipstream instead of pfactor and corkscrew effect but thanks for these videos! Got my solo coming up and I'm recapping everything

[@FreePilotTraining]

I like that! Thanks!

[@corbensumner3720]

I've heard it both ways, I've been "corrected" both ways too lol. Either works.

[@GLJ94]

I had come to this assumption by playing the WWII game Enlisted. The prop driven fighter craft in it have a torqe effect that pulls left on older planes and some of the better planes like the P51 have mitigation. I finally realized why the game craft kept pulling to the left when it dawned on me the torqe of the propeller would cause the body to rotate opposite of the prop. Love the games realism aspects

[@FreePilotTraining]

It’s amazing how those video game creators do that

[@corbensumner3720]

That's cool that a game would include that.

[@maddisonhayes8804]

This was great - thanks!

[@FreePilotTraining]

You’re welcome!

[@insertnamehere6659]

Question, could a double engine plane offset most of this by having one engine rotate left, and the other right?

[@FreePilotTraining]

Yes. That’s very common in multi engine aircraft

[@reuelmaharaj]

Its the same for helicopters and the reason why the have the rear propeller. the gyroscopic effect of the main propeller would force the helicopter to turn in the same direction it is spinning...clock or anticlockwise.☺

[@atstockland]

It's not a gyroscopic effect, it's a torque effect . Thats why the tail-rotor is known as the "anti torque rotor. gyroscopic precession is something different.

[@bleonardyou]

This is a great lesson on what the plane is doing and why. But what do you do about it? Is it as simple as stepping on the ball or is there more to it?

[@FreePilotTraining]

Yep. Step on the ball! I need to remake this video to discuss that more

[@chiyo8175]

Always appreciated for your high quality videos ❤ I have a question why generate more downward force when we pitches(nose) up?

[@FreePilotTraining]

Thank you! It should generate a nose right yawing motion when you pitch up from gyroscopic precession

[@olivierXV]

Hi and thanks for this very simplified reminder. Is that left wing producing more lift the cause to keep the right rudder during a stall practice? Because I've noticed that many instructors couldn't really explain this concept. Can we say that keeping the right rudder during a stall practice counteract the gyroscopic effect? Cheers

[@FreePilotTraining]

If you aren’t coordinated, then yes. One wing is creating more lift than the other

[@photon1972]

Nice. Thanks again

[@FreePilotTraining]

No problem

[@RV-rk3fj]

Great Video! But I have a question about torque. According to Newton's 3rd law, every action has 'EQUAL' and opposite direction reaction. Then re-action can compensates action, (action moves to right, and re-action moves to left) so sum of work can be '0'. How can still torque effects to airplane?

[@hubert190601pro]

Action of prop causes reaction on plane. Plane is heavier and wider (for math to do with moments) But basically force is the same but would need much much more to rotate the plane as much. Ik it's a late comment but if anyone else's comes across it

[@AbdelaliChihe]

thanks foe your great work you put in this video please can you cancel the music from the video

[@FreePilotTraining]

You’re welcome! The music goes away in the next few videos

[@arwood111]

Thank you!

[@myyouth6864]

I’m confused about the gyroscopic procession effect. Does it cause right turn tendency? If so then why it is important to the tail wheel airplanes? Is it that when we pitch down, doing so create right turn tendency ?

[@FreePilotTraining]

It causes a right turning tendency when you push up and a left turning tendency when you push down. You push the nose down on a normal takeoff in a tailwheel aircraft so you get an additional left turning tendency

[@zbredeson677]

@@FreePilotTraining Im confused now, so it is actually a right turning tendency on tricycle gear (C152)?

[@peterbortels81]

Hi, i was thinking about buying a Paper back copy of the Pilot Handbook of Aeronautical Knowledge and a Paperback copy of the Airplane Flying Handbook depending on how old the copy's are there is a significant price difference in these handbooks. is it worth buying the latest version or is the difference minimal?

[@FreePilotTraining]

An older ones probably fine. I wouldn’t get one more than 5 years old though.

[@지미월드]

Slightly confused with 2 things P-factor and Gyroscopic preccision. When pitching up, Gyroscopic precession also makes left turning tendency right? Due to the newton’s third law?

[@FreePilotTraining]

Gyroscopic precession will only cause the nose to move right when you pitch down because the direction the propeller is spinning. It’s usually offset by all the other left turning tendencies, except on a tailwheel airplane when they pitch down to get the tail off the runway. P-factor occurs because when the nose is pointed up, the propeller blade on the right has a higher angle of attack than the propeller on the left. This causes that right side to create more thrust

[@지미월드]

@@FreePilotTraining Really appreciate it helps me better understand!!!!!!👍👍👍👍👍👍

[@Thebeardedbeard]

Wow, working on my CFI right now. Great video, I'll be watching more of these. Thank you!

[@FreePilotTraining]

Thanks Gary! My newer videos are a lot better too

[@essarahimi9122]

You shoulda known all of these before take your pp check-ride!!!

[@RV-rk3fj]

Why left turning tendencies are most intense when takeoff?

[@FreePilotTraining]

Because you’re slow AND you’re at high power settings

[@erich930]

You’re slow, sometime heavy (even higher AOA) and at full power.

[@paulcrooks3742]

Simple. You àre so smart

[@FreePilotTraining]

Thank you so much

[@The_real_Dr_mysterious]

Putting A Curtis 1239e-8521 HPEVS AC-35 Brushless AC Motor Kit - in a Cessna 150 powered by a gas generator my idea is to use this electric motor with a generator to get better fuel mileage! Tell me what you think

[@FreePilotTraining]

Lol, I don’t know a lot about all that

[@mr.fredricklawngtawnghedav5094]

👍 tips good yes

[@FreePilotTraining]

Thanks!

[@ZenithE8]

How can you have low airspeed if the power is high?

[@FreePilotTraining]

It’s possible if there is a lot of drag on the airplane. Either high AoA or flaps are down

[@ryanhurley14]

Slow flight

[@cameronpark8718]

Think about takeoff, you’ll have slow speeds but high power setting

[@wk5788]

I really like your videos . But personally adding music to the video is quite distracting. I hope you consider getting back to how they were. Regards

[@FreePilotTraining]

Agreed. I don’t use music anymore except the beginning and end

[@wk5788]

Thank you

[@brandonsg1367]

Every torque explanation is “every action has an equal and opposite reaction” but that doesn’t explain the effect for me. The propeller is spinning clockwise, and the plane wants to go counter clockwise since it’s the opposite of the propeller, but why does that happen? I feel like intuitively, if the propeller is spinning clockwise, it would want to pull the plane in that direction. Why is the propeller essentially a separate object from the rest of the plane so that a force from the propeller has the opposite effect on the plane? It seems like the propeller and the plane should be one object, but it’s more like it’s two separate objects

[@FreePilotTraining]

Well, we talk about it like it’s the prop causing this, but in reality, it’s the engine. The engine is facing the other direction which means the torque is backwards. Hope this helps.

[@vlrginizer927]

Shout out Alpha 1