How does CONSTANT SPEED PROPELLER work?
A constant speed unit (variable-pitch propeller) is a complex topic. This video is a simplified representation of the mechanics behind a common CSU. We hope you will enjoy and find this explainer useful.
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Пікірлер: 144
30 pages in my ATPL book or simply a couple of minutes watching with perfect visualizations to memorize it a hundred times better. Thank you for your effort. I‘d love to see more ATPL related!
@flightclubonline
3 жыл бұрын
I'm so pleased you found it useful. Thanks for your feedback.
@Echo_Lima
Жыл бұрын
same here , atpl student in greece, thank you very much
@sigitagusprasetyo6962
Жыл бұрын
Perfect
@1UTUBEUSERNAME
11 ай бұрын
I agree 100%. Excellent visuals along with a perfect explanation. Thanks for putting in the time.
@bitcoinforex6963
5 ай бұрын
Facts
Hands DOWN the best explanation I’ve found! Brilliant!
@flightclubonline
2 жыл бұрын
Wow, thanks!
Thank you for the simplicity! Now I can read my maintenance engineering textbook with the basic understanding that it assumes I already have.
This is "The Best" explanation of CSU and variable pitch propeller ❤️
Thats amazing! you cant even imagine how much we appreciate to these efforts made to make this video happen!
@flightclubonline
4 жыл бұрын
We appreciate you watching and the feedback too. Thank you!
My ATPL course was so unclear, thanks to you this mecanism has become very clear ! It's not an easy mecanism to understand but you managed to explain it perfectly.
no other explanation, is as concise and precise as these flight-club animations. So well scripted, edited and animated. I refer to all of them for my PPL
@flightclubonline
4 жыл бұрын
Thank you so much Peter!
One of the best explanations I’ve ever seen! Great job and thank you for the effort!!
@flightclubonline
2 жыл бұрын
Wow, thanks!
Fabulous video. One can really picture how the whole system works in a way that makes perfect sense.
That was both interesting and informative. Thanks!
@flightclubonline
21 күн бұрын
Glad you enjoyed it!
As has been said by others in these comments. This is the best explanation with video explaining the CSP on the Internet!
This is the best Constant Speed Propeller explanation on internet. Congratulations
@flightclubonline
3 жыл бұрын
Wow, thanks!
that visualisation is as brilliant as the mechanics it shows. Thank you very much for your awesome videos. I learn a lot from you.
These explanations are so precise, concise, and well put together. Thank you for your hard work.
@flightclubonline
Жыл бұрын
You're very welcome!
Great to see you back. Be more frequent please 👍
Thank you very much. I appreciate your videos so much and am so happy you are making them again. I'm from Australia and about to sit my PPL exam. I read the two main authors I Australia for this topic and couldn't only sort of get my head around it. Your video, excellent!
@flightclubonline
4 жыл бұрын
You are so welcome!
What a brilliant video, covering each and every relevant detail. Fantastic.
Studying for my ATPL and this was very straight to the point and well explained. Thank you!
Thank you so much for your video,this is absolutely the best the video about the propeller pitch control and CSU! Your beneficence is boundless!
@flightclubonline
4 жыл бұрын
Glad you liked it!
The best explanation on the internet regarding Constant Speed Propellers. You Sir are amazing.
@flightclubonline
3 жыл бұрын
Thanks a lot
studying this for my oral test over constant speed propellers ! thanks 🙏
Really good. Just one thing, on the DA42 all is opposite. To achieve high pitch and low RPM oil should flow from the propeller to the oil tank and vice versa.
@DEEPAKKUMAR-zz1wy
2 жыл бұрын
From this vedio, what I got to see that while at climb or takeoff, low pitch and high rpm is required for which oil goes back from propeller to oil tank.
All your videos are of superb quality.. Thanks a lot for the effort put in making this, it's greatly appreciated
@flightclubonline
2 жыл бұрын
Glad you like them! Thank you very much.
I'm so glad I found this on my recommended videos page! Thank you!!
@flightclubonline
3 жыл бұрын
You're so welcome!
Great Explanation and visuals. I watched 3 other videos on the same subject and found them rambling and disorganised, with no proper visuals. This was perfect!
@flightclubonline
2 жыл бұрын
Awesome, thank you very much for such positive feedback!
Came looking for the kind used in power systems on commercial planes, had no clue this existed. Thank you for this content.
@flightclubonline
2 жыл бұрын
You're welcome.
Amazing explanation, can't be better than this!
Your videos are such clear and elegant things. Please keep up the excellent work.
@flightclubonline
Жыл бұрын
Thank you! Will do!
Lot of thanks. Very nicely explained. Huge appreciations!
@flightclubonline
3 жыл бұрын
Glad it was helpful!
Thanks so much! This is a wonderful explanation!
Thankyou so much for such a great and amazing ever seen animation !!
Best explanation around. Thank you!
@flightclubonline
3 жыл бұрын
Glad it was helpful!
It is a perfect video and you speak very clear, thank you.
@flightclubonline
7 ай бұрын
That's so kind. Thank you very much.
This was truly amazing
Thank you for this video. So easy to learn and understand!
@flightclubonline
2 жыл бұрын
Glad it was helpful!
Super useful knowledge! Thanks!!
@flightclubonline
7 ай бұрын
Glad it was helpful!
Awesome video! Great visuals.
@flightclubonline
Жыл бұрын
Much appreciated!
This is amazing and very clear! Thank you! :)
@flightclubonline
3 жыл бұрын
You're so welcome!
This is beautifully explained! Thank you
@flightclubonline
2 жыл бұрын
Glad you enjoyed it! Thank you so much.
Great video, found this explanation very helpful!
@flightclubonline
3 жыл бұрын
Awesome, thank you!
Very nice and interesting visualization. Thanks for sharing this. It helps me a lot to understand this control system.
@flightclubonline
3 жыл бұрын
Glad it was helpful!
I’m glad I watched this before my CPL flight test!
@flightclubonline
2 жыл бұрын
Wow! All the best!
This video was 👌🏻💯+10
Ah that's how they work. Very well explained. I think James Clerk-Maxwell wrote something on this subject a while ago. Kudos for the like and to those who know who James Clerk-Maxwell was. For others he wrote a paper "On governers" in 1868. It gave the mathematics behind designing governors as used with Watt's steam engine. The first paper on control. He also combined electricity and magnetism to show them as being one. Later another physicist stood on his shoulders who is today sadly much better known than Clerk-Maxwell.
Simply perfect.
Thanks for the video! You got a new subscriber. However, a couple of suggestions: at the beginning of video when showing fine and coarse pitch I would add "feathered" position. Secondly, when climbing/descending, the order of using throttle lever, eg. when Climbing (adding power): Pitch first, Throttle second; when Descending (reducing power): Throttle first, Pitch second. Cheers
@flightclubonline
3 жыл бұрын
Thanks for the suggestion. I should make a follow up video on this topic.
Stunning video! thanks
@flightclubonline
3 жыл бұрын
Many thanks!
Brilliant video
I'm tired to keep trying understand this system in my books still complicated but know I'm so satisfied with your explication it's very helpful thank you so much
@flightclubonline
Жыл бұрын
Great to hear!
Thank you for this
awesome explanation. best on WWW. thank you!
Fabulous explanation . Thank you so much.😀
@flightclubonline
2 жыл бұрын
You are welcome 😊
Greetings from Phoenix, Arizona. About to start working on a "complex" endorsement - that is what we call it in the states anyway. Thank you very much for this presentation, it is clear and concise! I wish more explanation videos were this good. Peace.
@makeupyourmindinator
3 жыл бұрын
I live in Surprise, Az and if you ever need a passenger for a check flight I’m available Sundays and Mondays.
@flightclubonline
3 жыл бұрын
Thank you and best of luck with the endorsement.
@archerpiperii2690
3 жыл бұрын
@@flightclubonline Thank you. I completed and got the endorsement. My instructor was impressed with how well I knew the governor operation!
@archerpiperii2690
3 жыл бұрын
@@makeupyourmindinator Surprise is a nice area, I fly over it when going KDVT => KBXK
@flightclubonline
3 жыл бұрын
Well done! That's fantastic news.
Brilliant!
All the serie of those videos are very very good and simple to understand. I also want to tell that this women has a beautiful and clear diction and a very cute accent.
Thanks!
This video was very very useful👍
@flightclubonline
3 жыл бұрын
Glad to hear that
Keep in mind the direction of actuation is often different be single engine and multi engine aircraft. Generally... Multi engine aircraft will move into a feathered position when there is no engine oil pressure and single engine aircraft will move to max fine.
Excellent animation!
@flightclubonline
2 жыл бұрын
Much appreciated. Thank you.
Thanks
This is only correct for single acting non-counterweighted propellers. The Governor is not always directly driven by the crankshaft, many are driven from the accessory drive, or even the from the gun synchronizer drive, i.e. P&W 985 for one.
@FlyNAA
Жыл бұрын
This is just a general intro to the basic concept. The point is, it turns a speed proportional to the engine. Any point the motion gets picked off from, is all the same result.
great explanation, cheers. As you said the pilot increase the RPM but the plane pitched up, the governor would automatically adjust the blade angle to compensate the RPM?
@michaelgeorge3092
3 жыл бұрын
my understanding is yes. as pilot increases throttle, rpm goes up. gov increases pitch to bring it back down. in doing so prop has more bite, more thrust. if the pilot pulled up without increasing throttle, then prop loading will slow rpm down, causing governor to reduce pitch, allowing speed to pick up again. so rpm remains constant. caveat is prop will be at lower pitch during climb.
I'm wondering if this only applies to McCauley because Hartzell oil pressure does the fine pitch part?
Hi flight-club, what great animations! Must have put in a lot of effort. Can I use some screen grabs from this video to share with my students please?
@flightclubonline
2 жыл бұрын
Of course, no problem 😊
@terencetay9051
2 жыл бұрын
@@flightclubonline Thank you. They'll be introduced to your channel and videos! :) Doesn't hurt for them to gain extra knowledge.
What happens with blade angle when we add power in cruise with constant speed prop? Does blade angle also increase?
napaka lupit
Hi could you please explain at the beginning of the video (1:30) it says as engine RPM increases(small blade angle) the fly weights move OUTWARDS and as the engine RPM decreases(large blade ) the flyweight move INWARDS , later on in the videos(3:45) it says as to maintain the high RPM (small blade angle) the flyweights now move INWARDS and to maintain a low RPM the flyweights now move OUTWARDS, which is contradicting what was said in the beginning of the video. Could you kindly provide some clarity? Thanks
Good video. For pitch up condition, torque should be high. Kindly correct me.
so how does the oil pressure get into the propeller hub when all that stuff is spinning?
This is a great animation, except one thing that make me confused. For PA44-180, when aircraft overspeed, oil leaves the prob hub and make pitch angle increases and vice versa. This is seems opposite animation in this video. Is there the general concept for all aircraft's CSU, or it differ aircraft by aircraft. Btw, that a great animation.
Be careful this is for single-engine aircraft. With oil pressure lowering the RPM, and nitrogen gas/spring send the PRM towards the high. So in the case of losing oil pressure, the propeller will work at full fine position. In multi-engine, it is completely opposite, oil pressure increases the RPM(fine), nitrogen gas/spring decreases the RPM(Coarse/feather). So in case of engine failure in a multi-engine aircraft, the pilot can feather the bad engine to decrease drag.
@IbrahimAlmalki-bg2pr
11 сағат бұрын
I was trying to find the correct answer after this video and it gave me a headache thank you for your help 👍
What does CSUB stand for?
Is the yellow part the nitrogen?
The animation would be for a non counterweighted prop as the animation showed the engine oil flowing into the prop and increasing to a more course position
Blade angle is referred to as low pitch or high pitch, not coarse/fine.
why is it that in a free turbine when the plane shuts down (less RPM) the prop feathers (pitch increases)? wouldn`t the oil lines have to be swapped and the propeller adjust pitch the other way around?
@XPoChangLinX
3 жыл бұрын
They're depicting a single engine aircraft where the engine is designed to windmill when oil pressure is lost. Most multies are designed to feather when oil pressure is lost. Direct drive turbines like most multi pistons have a locking pin that drops in place to prevent the props from feathering when RPM is too low.
Thanks a lot for the great work but if I may, I think the explanation is fundamentally misleading by confusing variable pitch propellers and constant speed ones. It is true that CSU achieve their goal by varying blade angle but the goal of a CSU is first and foremost to keep the engine running at a fairly constant RPM (like a gearbox) , the aerodynamically phenomena on the propeller being the mean rather than the end goal. So saying that CSU are the answer to fixed pitch propellers not having an optimal AoA in most phases of flight isn't correct: variable pitch propellers without a CSU do exist and are a solution to that problem. The philosophy behind CSU has more to do with engine power and efficiency. It is indeed a complex topic and comments and suggestions are welcome.
Sounds like this is for a naturally unfeathered prop where oil pressure increases blade angle (coarser), whereas other videos show a naturally feathered prop where oil pressure decreases blade angle (finer).
clockwise spin or anti-clockwise?
@Bendigo1
2 жыл бұрын
yes
Why is the propeller backwards. Spins clockwise as seen from the front.
i think the oil pump tend the porpeller to decrease the pitch angle not to increase't
@brahimbentadjine8822
Жыл бұрын
i need answer
Isn’t this something that could be used in human sized quadcopter? How energy efficient is it?
The engine can also have a governor that maintains engine RPM at the desired throttle setting.
Why all of this governer thing if the PIC can just control the flow of the oil from the pilot valve instead?
Wait... Right off the bat I dont understand why in the fixed pitch example, a change in airspeed would change prop AOA. I'm now deep down the rabbit whole. Send Help.
So stick shift for planes :p
@Bendigo1
2 жыл бұрын
More like automatic but with gear selection.
can I get a pin ?
F to the guy who came up with that idea lol
If the airplane ascending it must increase speed to prevent stall so the blades must be increase angle to take a huge bite of air so the engine must increase the torque.. and opposite is right descending .. not as you mention in video!
@michaelgeorge3092
3 жыл бұрын
kinda following your thinking. as it climbs, prop loading slows engine rpm, this in turn causes gov to reduce pitch to maintain rpm. but you have less bite, less thrust. only way to maintain thrust is to increase power. right ?