WHAT DRIVES A HELICOPTER the drive system from engine to rotor 

Free wheel system is like a pedal bike. You pedal, it applies power to the wheel and you accelerate. You stop pedaling and the rear doesn't immediately stop turning.

Hi guys,these episodes are so helping to some of us who have fallen in love with building small helicopters

Best way to describe the freewheel unit is a pedal system on a 10 speed bike... Long as you're pedaling, you're supplying power to the wheels, you can stop pedaling and the wheels keep going and even backpedal without affecting forward momentum.... Nice vid, thanks!

I work for a well known helicopter company and I use your videos to teach my new, predominantly fixed-wing orientated, Engineers about rotorcraft. Not being able to take them into a real aircraft right now due to COVID has meant your videos are a lifeline! Excellent as always!!

The science of helis is pretty amazing! I learnt lots here. I've heard the term "flapping for effect" used in the helicopter world...I haven't found a good explanation online. That, and any other helicopter science would be great to learn about. Cheers

This video is fantastic, great knowledge. Shared this with my girlfriend who loves your videos as well. I try to show her all of your videos for helicopter education as you explain aviation technology eloquently. Can't wait for more videos.

Amazing explanation! Love listening to and watching your videos. So very informative, comprehensive and easy to understand!

Great video! Loved the explanation of how that works. Made great sense to me. Safe flying!

I'm always happy for your informative videos!

Very cool! Thank you so much for taking the time to do these videos. I have always been interested in rotary flight, it’s neat to have a resource to feed an interest. Subscribed😊

I just love these tech episodes! The flying ones too, but I just love aviation technology! 👌🏻 That's why I do regular tech episodes myself, besides flying videos 👍🏻 Keep them coming!

Helicopters are one of the most amazing pieces of aviation engineering. It intrigues me everytime when I learn how they work. Good work on the video too.

Amazingly explained easily understandable. Thank a lot brother for this never exposed and useful information.

Another great video from a knowledgeable pilot! Thanks again. Orange copter is nice!

Great video sir. Thank you!

Very informative video explaining the inner works of a helicopter. I’ve been wanting to know these things. Thank you.

Absolutely a great explanation! Thank you!

I knew two Army aviators who flew Huey's in Vietnam for AHC's and I knew two maintenance guys. They explained the marvels of the rotor system to me. The UH-1 was the icon of Airmobile warfare. Here in the states, both of the guys I mentioned earlier hired on with Army Air at White Sands Missile Range as Range Safety pilots. Both of them were rated in other birds such as the AH-1(Cobra, CH-47 (Heavy Lift) & OH-6 (LOACH). Sikorsky's legend lives on!

Great explanation! I always thought that the capability of auto rotations in a helicopter was a bit of a convenient coincidence! Didn’t know there was that much engineering and design behind it!

Well, thanks to you I did learn one new thing today, so you didn't waste your time. hank-you for such an interesting video.

The thumbnail said you were going to show me about the rotor head and how control inputs are actually applied to the rotating blades.

Fascinating stuff bro. I'd love to see a breakdown of the tail rotor sometime. The mechanical engineering of these aircrafts blow my mind.

Very nice video. Thank you.

Thanks Misha. Another great video. Also you should be selling these caps with your other merch. I'd buy one! Keep up the great work 👍👍

Thanks PY for the informative video. Stay healthy.

Very well done.

Thanks much! Nice work. I enjoyed your video.

Great video, one question about the helicopter's engine start-up! I saw few times when you started the engine it went thru a few steps, if the Cabri G2 engine is a regular 4 cylinder flat engine then it should start just like a regular car engine, with a twisting a switch or pushing a button it should start quickly without any other process! I can't understand the concept so please if there is a chance then explain a little! thank you very much for your amazing videos, I am not a pilot but I hope one day soon I will have a chance to fly with you.

That's awesome how they work

Thank you very much,very clear.

Thanks for the video and comprehensive explanation. Very interesting, will now become a subscriber.

Thanks, quite informative.

Overunning clutch that uses sprags. Didn't know helis had them. Thanks for the vid

It makes a lot of sense, Thank u champ

Great vid, very informative......

Very good explanation man👍👍👍😜

yes, i have a question - how much distance does a helicopter need and what are the free fall auto-rotation speeds (downward) ? and,! what happens if the aircraft is moving forward with speed, and the engine stops - how does auto-rotation work with momemtum? (or, how much trickier is it?) thank you for your videos!

Thank you. Keep it up

Nice explanation

Great video man I always wanted to fly one.

thanks for sharing sharing this information

Awesomeness!!

narration with illustration AND animation would simplify it very clearly. but the verbal explanation IS pretty straightfoward. like the video though.love the channel too.👍🚁

Can you give us a demonstration of the Auto rotation while engine is switched off in mid air. Thanks

So the air going through the blades as your dropping keeps them spinning?

Excellent !

Hi thanks for the video, could you please help me understand the working principle of mi 26 during the runway takeoff.

Great stuff! Yes a fun one.

Great information dear why clutch system have not installed for to release both upper and tail puly

Amazing technology

Upon Engine failure does it automatically disingage the main rotor or is it done manually?

Nice Video Brother...

Reminds me of the "Centrifugal Clutch" used on Go-Karts. Same concept just larger equipment :-)

Freewheel or one way clutch is so main shaft won't snap from right and left tensions when you add and put down rpm on engine

Yes understand, appreciate in a Autorotation Hub and Tail run's Padel still in work 10 - 4 like in a Bell 47 - thank's Micha !

Very useful information. I was wondering how that decoupling would work. I figured you had to pull a lever or there was a switch. As long as the pulley does not jam up. I am thinking there is probably a max number of hours on this pulley and then it gets replaced with new. TheBeingReal seems to have the inside track. Wondering on how many HOURS this pulley can work before it needs attention? Truly a life saving device.

the gear that engaged and disengage with the rotor seems similar found in a moped motorcycle and portable grass cutter, I don't know what it call but seems similar

Awesome video. Very informative!

Awesome explanation 👍🏻👍🏻 will subscribe you after my stuff comes up after this pandemic ends and I get the parts, done the rest bro, stay safe 👍🏻👍🏻

Do you also have avideo on how the blades can turn while the axle is rotating. Im always kept wondering how it can adjust the blades while they rotate

Good stuff! In model Helis (and other applications) it’s called a one way bearing.

I’m in zoom flight class and I have to present drive systems to the class, this helped thank you

thank you.

Whats the mechanism in the free wheel pulley, a sprag clutch?

For how long the flywheel (i.e. the helicopter blades) can still rotate and keep enough lifting power?

With a Jet Turbine Helicopter what's that high pitch almost like a squealing sound before the main rotor starts to turn and then that popping sound instantly following the rotor beginning to turn?

Good lecturer

What’s the ratio between rotor speed, altitude and a safe landing?

What are the roles of the collective and the cyclic controls?

Great explanation, Mischa. Before I became interested in aviation, I was one of those people who thought helis would fall out of the sky if the engine died. I didn't have a clue! Learning about all these systems on rotary wing, and the way fixed wing aircraft wings work, ended my fear of flying. Lots of Japanese v-twin motorcycles use a similar "one way clutch" or "sprag" system for the starter. On Yamahas, they're prone to failure, which usually destroys the starter, and requires a bit of labor to get in and change. I just did one a few weeks ago for a friend. Good thing Yamaha isn't making sprags for helicopters! :) Hope you do more videos like this, especially for the swash plate. 👍🍻

Saw you guys flying the G2's in abbotsford last week and this week when I was out there. Quick question but who flies that gorgeous old-school looking white helicopter out of abbotsford? Not sure what it was but looked like an old-school Bell? Keep up the great work with your content! Too bad I wasn't in town when you were giving strangers free helicopter rides ;)

excellent informative video..... the mechanism you explained seems like Paul-ratchet system which works same way ...i.e. one direction free rotation ... God bless you.

Hey so since the clutch actuator pushes the upper pulley and tensions the belt, does this mean that the drivetrain is actually moved upwards too? (Including the flex plates?) Seems pretty non-rigid...

3:05 Free wheeling, Over-running (not over-riding), slipper, one way or properly called a Sprag clutch.

How close is it mechanically is it to the free wheel hub of a bicycle? In a bicycle you have slots that are angled.and ball bearings with enough space to evacuate into the outer hub n the free wheel direction that are forced forward into reliefs in the inner hub to drive.

That free wheel is something like the bendix drive in the car starter motor. Same work principle, same purpose.

Think Nordic Track ski machine for an everyday example of a sprag clutch. Locks up on the rearward power stroke....freewheels as you bring your leg forward. Each foot connected to the same shaft and flywheel assembly, but able to move and create power independently due to the sprag clutch.

How many degrees of total collective pitch does that helicopter allow? Fun vids, thanks!

Whats the Engine to propeller rpm ratio? Does different hp engines hav different ratios?

Nice 👍🏼

Think about the overriding clutch the same way you think about stopping pedaling your bike!

I’d like to understand if a helicopter has a starter motor similar to a car (where the starter motor shaft engages a gear attached on a flywheel but then retracts after a successful start) . I’m particularly interested in the case of a turbo shaft engine. There are plenty of videos showing the procedure to follow sitting in the pilot’s seat, butI can’t seem to find any video addressing what is going on back in the engine compartment. Thanks.

Could the rotor blades exceed normal rpm during autorotation ?

How does each Turn of the Blade affect the Movement of the Helicopter?

How the rotor motion is brought up to the main rotor from the engine ?? 🤔🤔 through a shaft which is going through the swash plate or something ??

i think a simple drawing of the sprag clutch system, or cutaway ,would tell the story, and how the inertia is stored in the rotor head, would make people feel a little safer when flying

What is the ratio between the main rotor and tail rotor rotation

Why the background music? I find it extremely distracting!

Nice...

Pl explain in details the helicopter drive mechanism with schematic diagram

Amazing video! Why do you get more horsepower (180hp) when you go higher up?

Is it like a cvt drive?

Ok ready to test drive..

Interesting.

The "freewheel unit" is also refered to as a one-way clutch.

wil be nice to have a practical demo on a a dismanteld engine...

how to build main rotor blade which device the blade inside-? and- swash Plate mechanism & syclick mechanism and collective mechanism Liverage (linkage)Looking Iam very Interesting, please reply.

What drives a helicopter? A helicopter driver. “E pluribus Unum"

Uh, huh-huh-huh. He said “shaft”. Huh-huh. 🤘🏻😎🤘🏻

Main center shift can takes the weight of whole helicopter Is it true