Fully Articulated and Semi-Rigid Rotor Systems

3 axis of movement in the Main Rotor
-Feather
-Flapping
-Hunting (lead & lag)

[@scottthewaterwarrior]

I think this is the best explanation I have seen. Having some actual blades that you move gives a far better idea of what is going on then just explanations and drawings.

[@user-uh8iq8yp2z]

Fantastic.. just into rotor dynamics.. and ur video is the best start to it.... explanation is crystal clear.. thank you

[@ScoutSniper3124]

This is the BEST of KZbin... learning something new. THANK YOU!

[@jeffrenman4146]

I love the design always have… So for that reason I've always flown radio controlled helicopters at the moment but the newest one is fully articulated. Most are. But the people that came together to invent all of these things made something really remarkable

[@roynorb]

So good, thank you for these videos of actual hardware.

[@marcelbigga5553]

Great videos, Mate! Thank you! Helps me easy to understand all the theoretical explanations much better!

[@mdyousupkhan]

হ্যব

[@davidwallace5738]

Great video sir. Thanks for posting.

[@jackchen1750]

very nice!!!

[@diegoplata5570]

I really Appreciate the time of this video. thanks

[@sigmasquadleader]

Definitely gonna invest in this for my next rotary-wing aircraft.

[@JuanSanchez-ht2el]

Impressive explanation

[@riteshkurmi7706]

Good information,❤

[@castles8463]

Brilliant video. Thank you.

[@capt.imanuddinyunusshmh.6549]

Highly respect to Main Rotor technology..

[@burakergocmen5661]

The best explanation. thanks

[@rutgerbvk3703]

Great video, thanks !!

[@buditarigangersang3692]

Wou keren helikopter canggih teknologinya lengkap

[@LaMiltonTheHoodrat]

Good vid! Studying to take the Army SIFT test

[@kroganoperator]

Same here, how did it go?

[@ChandikaAriyarathne-ey8tl]

Thank you

[@stachowi]

so good thank you

[@sekousuperdiabate1853]

Super video

[@Afrocanuk]

If single rotor head RC helicopters had flapping hinges, they'd be much easier to fly.

[@vitorsousa5390]

Awesome !

[@alirezadavarpanah6920]

amazing

[@r0bbiemiller888]

Any video on blade &head balance initial & dynamic on rotarway & mosquito.don't know what heli I will end up with.very good explanation on main head system.i'm just beginning on full size heli. Thanks R.M.

[@mike_romeo_lima]

Very interesting and nice to see! Maybe you can show us the semi-rigid rotor system under the aspect of mast bumping, can‘t find a video so far where it actually shows real footage. Please continue your work man, like and subscribe :)

[@MrSkidkicker]

Thanks for the comment, sounds as though you have a good grasp of the basics. The biggest problem is the reaction to the aircraft getting light, in a low g condition, the tail rotor causes the fuselage to roll to the right while the rotor (big gyro) maintains its plane of rotation. The pilot tries to correct for the roll, tilts the disk in the opposite direction and BANG, mast bumping. Thanks for the advice, I will try and get a video on it up soon. Skids

[@sgmanikandan9352]

Super

[@brianb-p6586]

"Flaps as a whole unit" means that it teeters.

[@Kris99media]

Which helicopter blade is used for showing fully articulated rotor system?

[@larrywhalen596]

Is there a "simplified" rotor head which can be used for a three-blade rotor system ? Something analogous to the Bensen 'type' teeter bar (?), since I would like to find out the difference in performance, such as lift and autorotation cabalities with three blades as opposed to two blades. Any thoughts shall be appreciated.

[@Aviator168]

kzbin.info/www/bejne/aWGQaWuNp5WBnqs kzbin.info/www/bejne/nGjLY6Jne5mHp5o

[@nikosgeorgakis6759]

On which category should we put the Astar (starflex) rotor?

[@MikkoRantalainen]

Have I understood correctly that the blade angle is the only thing controlled by the pilot and all the other movements is due aerodynamic forces and centrifugal force on the blades?

[@MrSkidkicker]

You are correct. Collective force changes the blade angle on all blades equally. The cyclic changes the angle of the blade at different points in order to get the blade to fly higher or lower depending on how the rotor disk is required to tilt.

[@rubenmoreira265]

so if you are hovering the blades should go to the max flappening position?? or they are in a medium position due to centrif forces evey with load@@MrSkidkicker

[@mohammedahmed-vx5zc]

Where are the fan blades and how?

[@doymotorspeed]

Airfoil nya ter buar dari bahan apa mister,?..

[@astrogabba1190]

I have a question,. In the fully articulated rotor system, if the blade is free to flap on it's own, and it shoud never bump the mast, how is it possibile for the wing to transfer the lift to the helicopter?

[@tuckerzehner7970]

Ive been trying to understand your question. with all blades spinning at 100% centrifugal force is effectively strengthening the blades and producing lift. flapping individually causes the system to speed up due to Coriolis force(semirigid underslung teatering - flap while tethered together 180º apart. CG is in the same spot during rotation therefore it does not speed up) . lead and lag counter Coriolis force by allowing the individual blade to speed up from flapping momentarily but is suppressed by the dampers. thus removing stress from the blades and rotor hub. flapping and lead/lag help the aircraft to make the uneven lift,,, distribute more evenly throughout the plane of rotation.

[@astrogabba1190]

@@tuckerzehner7970 thanks for the answer my question was simply how a non isostatic body can transfer lift to the mast. I now understand that it's the centrifugal force itself that makes it possible.

[@ankurduhoon1628]

Is there any example of 2 bladed fully articulated rotor system?

[@brianb-p6586]

Probably not - it's just cheaper and still effective to teeter. Separate flap hinges per blade are used because teetering doesn't work with more than two blades.

[@JorgePPG]

Hi, the as350 rotor head use pitch coupling during flapping? ... so the pitch changes as it goes up / down?

[@MrSkidkicker]

No, there is no coupling between the flapping and pitch change in the main rotor of the AS350. This is common on a variety of different tail rotors (except the AS350 tail rotor :)) and rare on most main rotors.

[@JorgePPG]

@@MrSkidkicker What is the angle of phase-lag on this rotor ?!

[@user-ol5fi6qy6g]

👍

[@vasimsaifi2824]

can u tell me that the star type rotor system will come under which catagory ? semi rigid or fully articulated.

[@MrSkidkicker]

Yes, because of its in plane stiffness, by definition, the star rotor head you are referring to can be considered to be semi ridged, but has the motions of a fully articulated rotor.

[@eric678]

@@MrSkidkickerThe astar isn't semi rigid is it? I always thought semi rigid referred exclusively to a teetering hinge rotor system. It's a rigid rotor system no? Specifically a hingeless, bearingless rigid rotor system?

[@JuanSanchez-ht2el]

⭐️⭐️⭐️⭐️⭐️⭐️⭐️⭐️

[@leemnav]

Who the hell is "Uan de le severce"....? Just joking , I know you mean Juan de la Cierva. Good educational video.

[@MrSkidkicker]

Haha. Yes, I had some kind of mental block when I said his name.

[@ajaydev723]

How to hendal control systems work view video s pls sow,

[@Chinese-Food66]

Do you sell rotor blades? Please reply when you see. Thank you

[@MrSkidkicker]

No, sorry. I am not in sales. You can purchase blades from the helicopter manufacturer directly.

[@Chinese-Food66]

Thank you

[@Chinese-Food66]

At present, I do not know a lot about airplanes by myself. I have a question to ask you whether the blades of NACA8H12 rotorcraft can be used in helicopters.

[@Chinese-Food66]

Because it's not easy for me to buy here in China

[@MrSkidkicker]

@@Chinese-Food66 The NACA8h12 airfoil would require too high of an RPM to be used along the length of the rotor. What are you trying to get airborne?

[@JeffChoppah]

Building a semi rigid...just uploaded blade grips video...

[@sydneylaughren3053]

my dad made me do this

[@maninthemiddleground2316]

Just a suggestion … we don’t actually need to see you. For technical videos like this one what is more important is the visualization and explanation. I could see you’re straining holding the camera, showing yourself and showing what you need to explain.

[@MrSkidkicker]

I hear you. Thanks for the tip. I’m not the most photogenic eh?

[@maninthemiddleground2316]

@@MrSkidkicker you are photogenic… 😉 at least certainly more photogenic than me 🙂 the thing is the camera just isn’t wide angle enough to put you and what you need to show on the same scene doing what amounts as a “selfie angle” 🙂 i mean no harm … my input is just to make easier for you 🙂✌️

[@MrSkidkicker]

@@maninthemiddleground2316 Thanks Vincent. Your tips are appreciated and I will be incorporating your tips in future videos.

[@MikkoRantalainen]

I agree. I think a good solution is to keep the selfie angle while you're explaining stuff but switch to another camera angle for the actual demonstration. Video instrustry calls this alternative camera angle as B roll for historical reasons, if I've understood correctly. However, this obviously requires video editing or use of two cameras with easy to switch camera input on the fly setup.

[@MrSkidkicker]

@@MikkoRantalainen Thanks for the tips Mikko. I will be remaking the video soon. This was my first attempt at filming and my amateur film making experience shines through :)

[@Aviator168]

The lead/lag movement is not necessary for a 2 blade system.

[@oscarpimentel3315]

Two blades are semi-rigid the Blade make the action lead and lag however the Main rotor Head and blades hás the time reduced per half life of hours incomparassion with articulate, the articulate Main Head is more quality and Fine now do exist the rigid sistem aplicable in Messershimmit BO 105/ Bk 117 are Acrobátics and main rotor Head makes in Titanium and only hás movement of Piching and hás one vibration 1/1 ever.

[@emonahmednaime3004]

Help me

[@kennyrocha2689]

Hello

[@billn8555]

I wanted to see the rotor, but not your face in the middle of the camera for over half the video.

[@garyyoung4074]

Just found this video. So....why do all modern gyrocopters use only a 2 blade, large diameter flappy rotor? I would think a smaller diameter 3 blade rotor would be less drag, less stick shake, and less retreating blade factor. I think autogyros are great except for how slow they are. If you really want to GO SOMEWHERE, rather than just fly around at 70kts, you need a machine that can cruise at....maybe 120kts. Why so slow. Do you know?

[@brianb-p6586]

Gyrocopters are as cheap as possible, so they usually have simple two-blade teetering rotors; some even tilt the rotor rather than using cyclic pitch control.