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

  • @cdg9552
    @cdg95523 жыл бұрын

    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

    @flightclubonline

    3 жыл бұрын

    I'm so pleased you found it useful. Thanks for your feedback.

  • @Echo_Lima

    @Echo_Lima

    Жыл бұрын

    same here , atpl student in greece, thank you very much

  • @sigitagusprasetyo6962

    @sigitagusprasetyo6962

    Жыл бұрын

    Perfect

  • @1UTUBEUSERNAME

    @1UTUBEUSERNAME

    11 ай бұрын

    I agree 100%. Excellent visuals along with a perfect explanation. Thanks for putting in the time.

  • @bitcoinforex6963

    @bitcoinforex6963

    5 ай бұрын

    Facts

  • @boogerwood
    @boogerwood2 жыл бұрын

    Hands DOWN the best explanation I’ve found! Brilliant!

  • @flightclubonline

    @flightclubonline

    2 жыл бұрын

    Wow, thanks!

  • @JacoJohan46664
    @JacoJohan466642 жыл бұрын

    Thank you for the simplicity! Now I can read my maintenance engineering textbook with the basic understanding that it assumes I already have.

  • @sharoz6300
    @sharoz63003 жыл бұрын

    This is "The Best" explanation of CSU and variable pitch propeller ❤️

  • @Jcakman
    @Jcakman4 жыл бұрын

    Thats amazing! you cant even imagine how much we appreciate to these efforts made to make this video happen!

  • @flightclubonline

    @flightclubonline

    4 жыл бұрын

    We appreciate you watching and the feedback too. Thank you!

  • @hyperaspiste
    @hyperaspiste Жыл бұрын

    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.

  • @theschoolagency
    @theschoolagency4 жыл бұрын

    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

    @flightclubonline

    4 жыл бұрын

    Thank you so much Peter!

  • @yuhocho6107
    @yuhocho61072 жыл бұрын

    One of the best explanations I’ve ever seen! Great job and thank you for the effort!!

  • @flightclubonline

    @flightclubonline

    2 жыл бұрын

    Wow, thanks!

  • @JC-cw1ww
    @JC-cw1ww Жыл бұрын

    Fabulous video. One can really picture how the whole system works in a way that makes perfect sense.

  • @emanuelmota7217
    @emanuelmota721722 күн бұрын

    That was both interesting and informative. Thanks!

  • @flightclubonline

    @flightclubonline

    21 күн бұрын

    Glad you enjoyed it!

  • @Maclyn.Stringer_CFI
    @Maclyn.Stringer_CFI Жыл бұрын

    As has been said by others in these comments. This is the best explanation with video explaining the CSP on the Internet!

  • @miguelraulgonzalez7744
    @miguelraulgonzalez77443 жыл бұрын

    This is the best Constant Speed Propeller explanation on internet. Congratulations

  • @flightclubonline

    @flightclubonline

    3 жыл бұрын

    Wow, thanks!

  • @Catarrhini.
    @Catarrhini.4 жыл бұрын

    that visualisation is as brilliant as the mechanics it shows. Thank you very much for your awesome videos. I learn a lot from you.

  • @alexc5449
    @alexc5449 Жыл бұрын

    These explanations are so precise, concise, and well put together. Thank you for your hard work.

  • @flightclubonline

    @flightclubonline

    Жыл бұрын

    You're very welcome!

  • @sharoz6300
    @sharoz63004 жыл бұрын

    Great to see you back. Be more frequent please 👍

  • @uk8804
    @uk88044 жыл бұрын

    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

    @flightclubonline

    4 жыл бұрын

    You are so welcome!

  • @sachinkumar064
    @sachinkumar06410 ай бұрын

    What a brilliant video, covering each and every relevant detail. Fantastic.

  • @georgeb6909
    @georgeb69093 жыл бұрын

    Studying for my ATPL and this was very straight to the point and well explained. Thank you!

  • @bg2dxg601
    @bg2dxg6014 жыл бұрын

    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

    @flightclubonline

    4 жыл бұрын

    Glad you liked it!

  • @ArunKumar-wc2uf
    @ArunKumar-wc2uf3 жыл бұрын

    The best explanation on the internet regarding Constant Speed Propellers. You Sir are amazing.

  • @flightclubonline

    @flightclubonline

    3 жыл бұрын

    Thanks a lot

  • @ValbbyRod
    @ValbbyRod4 ай бұрын

    studying this for my oral test over constant speed propellers ! thanks 🙏

  • @FunWorldGame1993
    @FunWorldGame19933 жыл бұрын

    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

    @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.

  • @ricp
    @ricp2 жыл бұрын

    All your videos are of superb quality.. Thanks a lot for the effort put in making this, it's greatly appreciated

  • @flightclubonline

    @flightclubonline

    2 жыл бұрын

    Glad you like them! Thank you very much.

  • @mohammedsalah5416
    @mohammedsalah54163 жыл бұрын

    I'm so glad I found this on my recommended videos page! Thank you!!

  • @flightclubonline

    @flightclubonline

    3 жыл бұрын

    You're so welcome!

  • @andoletube
    @andoletube2 жыл бұрын

    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

    @flightclubonline

    2 жыл бұрын

    Awesome, thank you very much for such positive feedback!

  • @challacustica9049
    @challacustica90492 жыл бұрын

    Came looking for the kind used in power systems on commercial planes, had no clue this existed. Thank you for this content.

  • @flightclubonline

    @flightclubonline

    2 жыл бұрын

    You're welcome.

  • @Ezel21love
    @Ezel21love Жыл бұрын

    Amazing explanation, can't be better than this!

  • @johnroberts7529
    @johnroberts7529 Жыл бұрын

    Your videos are such clear and elegant things. Please keep up the excellent work.

  • @flightclubonline

    @flightclubonline

    Жыл бұрын

    Thank you! Will do!

  • @AbhidwipNath
    @AbhidwipNath3 жыл бұрын

    Lot of thanks. Very nicely explained. Huge appreciations!

  • @flightclubonline

    @flightclubonline

    3 жыл бұрын

    Glad it was helpful!

  • @Dana_Bellamy
    @Dana_Bellamy3 ай бұрын

    Thanks so much! This is a wonderful explanation!

  • @vineetgajbhiye4557
    @vineetgajbhiye4557 Жыл бұрын

    Thankyou so much for such a great and amazing ever seen animation !!

  • @GeorgeChaidaris
    @GeorgeChaidaris3 жыл бұрын

    Best explanation around. Thank you!

  • @flightclubonline

    @flightclubonline

    3 жыл бұрын

    Glad it was helpful!

  • @abdelg450
    @abdelg4507 ай бұрын

    It is a perfect video and you speak very clear, thank you.

  • @flightclubonline

    @flightclubonline

    7 ай бұрын

    That's so kind. Thank you very much.

  • @randyrodriguez4419
    @randyrodriguez44195 ай бұрын

    This was truly amazing

  • @HS-qk2pz
    @HS-qk2pz2 жыл бұрын

    Thank you for this video. So easy to learn and understand!

  • @flightclubonline

    @flightclubonline

    2 жыл бұрын

    Glad it was helpful!

  • @Minyx03
    @Minyx037 ай бұрын

    Super useful knowledge! Thanks!!

  • @flightclubonline

    @flightclubonline

    7 ай бұрын

    Glad it was helpful!

  • @jamison7soccer
    @jamison7soccer Жыл бұрын

    Awesome video! Great visuals.

  • @flightclubonline

    @flightclubonline

    Жыл бұрын

    Much appreciated!

  • @KLee-yj7vs
    @KLee-yj7vs3 жыл бұрын

    This is amazing and very clear! Thank you! :)

  • @flightclubonline

    @flightclubonline

    3 жыл бұрын

    You're so welcome!

  • @martinhsl68hw
    @martinhsl68hw2 жыл бұрын

    This is beautifully explained! Thank you

  • @flightclubonline

    @flightclubonline

    2 жыл бұрын

    Glad you enjoyed it! Thank you so much.

  • @legoboyM
    @legoboyM3 жыл бұрын

    Great video, found this explanation very helpful!

  • @flightclubonline

    @flightclubonline

    3 жыл бұрын

    Awesome, thank you!

  • @gombo-ochirazjargal8386
    @gombo-ochirazjargal83863 жыл бұрын

    Very nice and interesting visualization. Thanks for sharing this. It helps me a lot to understand this control system.

  • @flightclubonline

    @flightclubonline

    3 жыл бұрын

    Glad it was helpful!

  • @shawnsohtra9975
    @shawnsohtra99752 жыл бұрын

    I’m glad I watched this before my CPL flight test!

  • @flightclubonline

    @flightclubonline

    2 жыл бұрын

    Wow! All the best!

  • @Jay-fv1hc
    @Jay-fv1hc4 жыл бұрын

    This video was 👌🏻💯+10

  • @powerjets3512
    @powerjets35122 жыл бұрын

    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.

  • @davidmad5076
    @davidmad507623 сағат бұрын

    Simply perfect.

  • @StjepanNikolic
    @StjepanNikolic3 жыл бұрын

    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

    @flightclubonline

    3 жыл бұрын

    Thanks for the suggestion. I should make a follow up video on this topic.

  • @alessiolucchesi814
    @alessiolucchesi8143 жыл бұрын

    Stunning video! thanks

  • @flightclubonline

    @flightclubonline

    3 жыл бұрын

    Many thanks!

  • @tcjwth
    @tcjwth Жыл бұрын

    Brilliant video

  • @zakariaelgarda8681
    @zakariaelgarda86812 жыл бұрын

    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

    @flightclubonline

    Жыл бұрын

    Great to hear!

  • @DavK637
    @DavK6375 ай бұрын

    Thank you for this

  • @uroscadez
    @uroscadez3 жыл бұрын

    awesome explanation. best on WWW. thank you!

  • @KRISHNA_VARMA
    @KRISHNA_VARMA2 жыл бұрын

    Fabulous explanation . Thank you so much.😀

  • @flightclubonline

    @flightclubonline

    2 жыл бұрын

    You are welcome 😊

  • @archerpiperii2690
    @archerpiperii26903 жыл бұрын

    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

    @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

    @flightclubonline

    3 жыл бұрын

    Thank you and best of luck with the endorsement.

  • @archerpiperii2690

    @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

    @archerpiperii2690

    3 жыл бұрын

    @@makeupyourmindinator Surprise is a nice area, I fly over it when going KDVT => KBXK

  • @flightclubonline

    @flightclubonline

    3 жыл бұрын

    Well done! That's fantastic news.

  • @jacopo6197
    @jacopo61977 күн бұрын

    Brilliant!

  • @denismorissette419
    @denismorissette4192 жыл бұрын

    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.

  • @TheBL-ZNL
    @TheBL-ZNL Жыл бұрын

    Thanks!

  • @bilals2110
    @bilals21103 жыл бұрын

    This video was very very useful👍

  • @flightclubonline

    @flightclubonline

    3 жыл бұрын

    Glad to hear that

  • @XPoChangLinX
    @XPoChangLinX3 жыл бұрын

    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.

  • @LWH2011
    @LWH20112 жыл бұрын

    Excellent animation!

  • @flightclubonline

    @flightclubonline

    2 жыл бұрын

    Much appreciated. Thank you.

  • @mohammedpilot2335
    @mohammedpilot2335 Жыл бұрын

    Thanks

  • @michaelhope7620
    @michaelhope76203 жыл бұрын

    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

    @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.

  • @waitdaniel
    @waitdaniel4 жыл бұрын

    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

    @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.

  • @chard6649
    @chard66497 ай бұрын

    I'm wondering if this only applies to McCauley because Hartzell oil pressure does the fine pitch part?

  • @terencetay9051
    @terencetay90512 жыл бұрын

    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

    @flightclubonline

    2 жыл бұрын

    Of course, no problem 😊

  • @terencetay9051

    @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.

  • @brunoboj504
    @brunoboj504 Жыл бұрын

    What happens with blade angle when we add power in cruise with constant speed prop? Does blade angle also increase?

  • @Krabbykrabbkrabb
    @Krabbykrabbkrabb4 ай бұрын

    napaka lupit

  • @elendhdrennaidoo390
    @elendhdrennaidoo3902 жыл бұрын

    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

  • @khalidmehmood6481
    @khalidmehmood6481 Жыл бұрын

    Good video. For pitch up condition, torque should be high. Kindly correct me.

  • @brodricj3023
    @brodricj30232 ай бұрын

    so how does the oil pressure get into the propeller hub when all that stuff is spinning?

  • @aviationinspired4414
    @aviationinspired4414 Жыл бұрын

    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.

  • @Thomson_Tam
    @Thomson_Tam4 ай бұрын

    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

    @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 👍

  • @PavelKryuchkov
    @PavelKryuchkov4 жыл бұрын

    What does CSUB stand for?

  • @daniellelue6755
    @daniellelue6755 Жыл бұрын

    Is the yellow part the nitrogen?

  • @williamalcorn3913
    @williamalcorn39132 жыл бұрын

    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

  • @erickborling1302
    @erickborling13022 ай бұрын

    Blade angle is referred to as low pitch or high pitch, not coarse/fine.

  • @davideildella5185
    @davideildella51853 жыл бұрын

    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

    @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.

  • @samcoder6900
    @samcoder6900 Жыл бұрын

    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.

  • @roybenjamin9347
    @roybenjamin93473 жыл бұрын

    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).

  • @manjunathayr9348
    @manjunathayr93483 жыл бұрын

    clockwise spin or anti-clockwise?

  • @Bendigo1

    @Bendigo1

    2 жыл бұрын

    yes

  • @erickborling1302
    @erickborling13022 ай бұрын

    Why is the propeller backwards. Spins clockwise as seen from the front.

  • @brahimbentadjine8822
    @brahimbentadjine8822 Жыл бұрын

    i think the oil pump tend the porpeller to decrease the pitch angle not to increase't

  • @brahimbentadjine8822

    @brahimbentadjine8822

    Жыл бұрын

    i need answer

  • @Wloppish
    @Wloppish2 жыл бұрын

    Isn’t this something that could be used in human sized quadcopter? How energy efficient is it?

  • @eugeneoreilly9356
    @eugeneoreilly93563 жыл бұрын

    The engine can also have a governor that maintains engine RPM at the desired throttle setting.

  • @hmabboud
    @hmabboud10 ай бұрын

    Why all of this governer thing if the PIC can just control the flow of the oil from the pilot valve instead?

  • @ptyeueiiwjd
    @ptyeueiiwjdАй бұрын

    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.

  • @jasonpereira4024
    @jasonpereira40242 жыл бұрын

    So stick shift for planes :p

  • @Bendigo1

    @Bendigo1

    2 жыл бұрын

    More like automatic but with gear selection.

  • @ashwath2207
    @ashwath2207 Жыл бұрын

    can I get a pin ?

  • @vasilisz4916
    @vasilisz49162 жыл бұрын

    F to the guy who came up with that idea lol

  • @LawatheMEid
    @LawatheMEid4 жыл бұрын

    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

    @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 ?