I wish you take a video about Semi-Rigid rotor system too…..
@chrishard76164 күн бұрын
Thanks for this explanation. I was playing around with an RC helicopter and couldn’t understand why the blade pitch appeared to be out by 90 degrees. Now I know why!
@spasticnapjerk7 күн бұрын
Great job!
@madennhelsuh7 күн бұрын
thx u2, atmic shitty, orz?
@joestocker66010 күн бұрын
Awesome! Thanks 😊
@mrpurcountry11 күн бұрын
Don't copy this system it will never fly.
@LawatheMEid11 күн бұрын
Thompson coupling is a CV (constant velocity)but gas many parts.
@carlosargemiromonteiro424912 күн бұрын
Muito bom, parabéns
@charlieteirney425212 күн бұрын
Thankyou for creating these videos my friend. Helicopters are very sophisiticated machinery, for beginners videos like these create a very simple understanding of very complex mechanical movements.
@bolujokuadepitan339113 күн бұрын
You take subtitle cover everything please adjust
@bzig492913 күн бұрын
I know... I corrected this in future videos, but I can't change the location of the subtitles, so this older video will remain like this. I really appreciate the feedback. This is a popular video, so I may redo the video to correct the poor placement of the content.
@msvijayendrarao415013 күн бұрын
Respect, thanks for another nice video
@Mod-ym1zn14 күн бұрын
Nice information 🤙🤙
@bzig492913 күн бұрын
Thanks ✌️
@powermapsukltd618614 күн бұрын
No wonder so many helicopters seem to fall out of the sky, with so many critical failure points 😂
@pelinelden14 күн бұрын
So when we do cyclic inputs all those lead leg flapping comes with feathering right? On the 8:00 since you did feathering flapping lead leg one at a time. There is no other control that caused flapping or lead leg right ?
@gabpedroza14 күн бұрын
Awesome dude!
@punchitindaface227815 күн бұрын
Could you do the C-5 Galaxy? It really help some of the new guys coming outta tech school. Especially hydro
@abdulsattar576116 күн бұрын
When sir you explain with your lovely sound then written pattern up on components really disturbing all viewers but no anyone tell you thier common problem.pl remove these all written patterns thank you sir
@bzig492915 күн бұрын
I understand... I added text that conflicts with the autogenerated subtitles. I won't do this for future videos, but I can't edit previously posted videos. Thanks for taking the time to let me know! I like this feedback, because it helps me improve these videos.
@mjohnbennet16 күн бұрын
Also known as Harley splicer?
@bzig492916 күн бұрын
Did you mean "Spicer"? That's a company that makes a lot of these... I see them sold online as "Spicer" joints. Maybe they are like the "Kleenex" of U joints.
@patbar496716 күн бұрын
Amazing videos to see the functionality of many things in our everyday lives,..and we never understood how it actually works!💪📐
@bzig492915 күн бұрын
thanks for the comment. I did this faceless, no-narration video, of a centrifugal governor... eventually, I'll do another video with some context behind it. This machine was the control system that had a lot to do with the start of the industrial revolution.
@markymarco257016 күн бұрын
I don't get jackshit.
@oliverwabwire283616 күн бұрын
The only still part of a helicopter....is the fuel filler cap 😢
@bzig492915 күн бұрын
nah... that vibrates also :)
@ronaldgreen529216 күн бұрын
Why can't, or use these, instead of cv joints?! These would seem more, stronger and last longer than cv joints!
@bzig492915 күн бұрын
U joints have cyclic loading as the output shaft speed varies. I believe they use CV joints where cyclic loading is badness, such as front axels on front-wheel drive cards. Surprisingly, CV joints are pretty inexpensive, even though they are more complex. (although more cost to replace them due to the maintenance hours).
@mostee7716 күн бұрын
Excellent work
@bzig492915 күн бұрын
thanks!
@ericdillan896116 күн бұрын
do you have the 3d model
@bzig492916 күн бұрын
yes, I modeled this in Auto desk Fusion
@Kogacarlo17 күн бұрын
6:28 is not 120° direction change but 60°. For the tail rotor there's six rubber couplings. I wonder what's the change interval for these.
@Swinginspanners17 күн бұрын
Rightio mate 🤦🏼🤣🤣🤣
@alphonsesynrem2817 күн бұрын
Simply awesome.
@trstquint711417 күн бұрын
Too many parts!!!! Problems are around the corner.
@bzig492915 күн бұрын
Harry Reasoner wrote, "The thing is, helicopters are different from planes. An airplane by its nature wants to fly, and if not interfered with too strongly by unusual events or by an incompetent pilot, it will fly. A helicopter does not want to fly. It is maintained in the air by a variety of forces and controls working in opposition to each other, and if there is any disturbance in this delicate balance the helicopter stops flying; immediately and disastrously. There is no such thing as a gliding helicopter. This is why being a helicopter pilot is so different from being an airplane pilot, and why in generality, airplane pilots are open, clear-eyed, buoyant extroverts and helicopter pilots are brooding introspective anticipators of trouble. They know if something bad has not happened it is about to"
@-_-Phoenix-_-18 күн бұрын
Would multiple universal joints in line with adjustable angles act as a sort of transmission depending on the angles used?
@ronaldgreen529216 күн бұрын
No
@SeeWildlife18 күн бұрын
Missed a trick to say 'look at the nipples' to see the diff.
@tithochanbara777018 күн бұрын
Good job👍
@gabedarrett130118 күн бұрын
I've always wondered how power is transmitted to the wheels when there's a suspension! Thanks!
@mrmcdermo18 күн бұрын
I noticed in your renderings what looks like a possible grease port on the cross. Is that what it is, and if so, does that imply that the cross is hollow and can be filled with grease to lubricate the bushings/bearings that support the yokes of each shaft?
@bzig492918 күн бұрын
Yes, there is a grease fitting on the cross; that's what I intended. I'm sure there are u joints with sealed bearings, and no grease fittings, but I know for sure that a 1992 Jeep has grease fittings on the cross. I also used parts from McMaster-Carr as a reference for creating the 3d model and all the ones I saw had grease fittings... Although I didn't look at every available part.
@Darkralos18 күн бұрын
@@bzig4929 In my experience, they do have grease fittings.
@Eric2300jeep16 күн бұрын
A joint with a grease zerk fitting is called greasable, while one without the fitting is called sealed. Typically speaking, a greasable joint is more prone to failure and a sealed joint is more favorable. But, that's all dependent on whether or not the end user is good at regular maintenance and also what the application of the joint is. When applying to vehicles, a stock application (no modifications to engine power output or suspension) with regular maintenance will benefit greatly from a greasable joint. A heavily modified vehicle (even with regular maintenance) won't see the same benefit, due to the cross of the joint being hollow and therefore less strong. It's something to consider when selecting the right U joint for the job
@mrmcdermo18 күн бұрын
Great video! Next do CV joints. 😆
@bzig492918 күн бұрын
Great suggestion!
@jimomertz18 күн бұрын
Cool animation. I knew this for a long time, but it was nice to see in operation.
@bzig492918 күн бұрын
Glad you liked it!
@monteiro530618 күн бұрын
Awesome vídeo. That simple
@user-us3dp7tb3m18 күн бұрын
Bravo!! Another great video.
@bzig492918 күн бұрын
Thanks again!
@monteiro530618 күн бұрын
Extraordinary vídeo. Thank you VERY MUCH and GREETINGS FROM BRAZIL.
@bzig492918 күн бұрын
Obrigado! And thanks for watching.
@charlieteirney425219 күн бұрын
incredible explanation
@dancing_frank_lee19 күн бұрын
thank you so much for this video!
@user-co7ty7jd9u20 күн бұрын
로우더 양력발생시 날개각도 조정
@addmix20 күн бұрын
Why is it that we would want to achieve maximum displacement from the flapping at a certain point, rather than achieving maximum lift at a certain point of the rotation? If the goal is to move the lift vector to control the helicopter, isn't that linked to the maximum force produced by the blades, and not the maximum displacement of the flapping hinge? At the end of the day, you need the forces to balance out such that you have controlled lift on the helicopter, so I don't understand why having maximum force offset by ~90 degrees leads to this. Edit: thinking about it a little more, is it instead that on a fully articulated rotor, lift of the blades doesn't directly lift the helicopter, only giving the blades inertia, and through the centrifugal motion, that blade's inertia is then transferred to the rotor head after ~90 degrees? As a side question, what is the leaf spring-looking thing inside the lead-lag hinge in your model?
@bzig492920 күн бұрын
It's not that you want the max displacement to occur at a certain point... it's that you need it to do that in order to control the aircraft. To fly forward, you need the tip-path to tilt forward, so that means each rotor blade needs to be at it's highest point of flapping at the six o'clock position (over the tail boom). To achieve this, you have to apply the lift to the blade 90 degrees prior. Maybe a way to think of it is all the blades produce (almost) equal lift. It's not the lift on each individual blade that controls the helicopter, rather it's the overall lift and the tilt of the tip-path-plane that points that lift in the correct direction. I've flown a lot of formation flight in helicopters, and it's cool to see the entire rotor disk respond to control inputs as a single entity. It really doesn't look like individual blades, but rather as a single disk that tilts in the direction the pilot wants the aircraft to go. It may also help to think that the hub isn't capable of reacting moments at the flapping hinge; lift from the individual blades can't apply a moment to the mast to maneuver the aircraft. The overall lift vector, applied through the plane of all the rotor blades, is where the control comes from. The leaf spring looking thing is a tension torsion strap that reacts CF loads. The model of the rotor head came from images of the Boeing CH-46 Sea Knight helicopter and the TT strap when through the lead-lag hinge this way. I reused that 3d model for this animation. Good eye for detail!
@ilnaz733121 күн бұрын
Hello everyone! Please, Where can I find and install this simulator?
@bzig492920 күн бұрын
it's not really a simulator, although I may refer to it as that in some of these videos. This is done in 3d animation software called Blender. Blender is free and open source... anyone can download it and install it. Although it's animation software, I treat it like a simulation for making these videos. There are almost no animation key frames involved in making these videos. Instead, I program the equations of motion for real-world motion and aerodynamics into a feature of Blender called "drivers." Drivers allow me to interact with my 3d models using Python code and it's much better for this type of video than key framing the motion. Blender has a steep learning curve, but it's an amazing tool. Particularly since it's completely free.
@totokid290722 күн бұрын
Thank you
@user-mq3lj9jc3t22 күн бұрын
256rpm, so it's 4 or 5 rotations per second for this model. Slower then I have imagined.
@bzig492922 күн бұрын
That's the actual RPM of the Sikorsky S92 helicopter. Larger helicopters have slower RPM. The design goal is to keep tip speed below mach 1. So you want rpm*blade radius+max forward flight speed < mach 1.
@user-mq3lj9jc3t21 күн бұрын
@@bzig4929 The blade tip air speed below mach 1 thing is very informative, and do need to add the forward flight speed, many thanks!
@oceanree23 күн бұрын
Very clear explanation. Thank you very much
@bzig492918 күн бұрын
You are welcome!
@southerncross495625 күн бұрын
Outstanding work. There are a lot of really knowledgeable, smart people that will watch this and give you a thumbs up and subscribe, as I have done.
@bzig492925 күн бұрын
Thanks! I appreciate the comment.
@VenturiLife26 күн бұрын
These are pretty intricate systems. Interesting and detailed explanation.