Riding the Propeller. 0.2 RPM.
ฝัง
- เผยแพร่เมื่อ 1 มิ.ย. 2018
- This is me riding the propeller on a ship with a steam turbine engine. Since it is a rather long process to start up a steam turbine, we are talking about 24 hour, they want to keep it running slowly. Slow means about 0.2 RPM, or one turn in five minutes. On this ship we did a propeller polishing. You might think it is impossible, witch I did at first too, but it works. You only need tend your umbilical at all time and be extremely careful.
The diameter of the propeller is 9.1 meters and it weighs about 60 metric tons.
Underwater video, showing the turning propeller, will be uploaded later on. - วิทยาศาสตร์และเทคโนโลยี
So for all you people without a Ship Construction/Merchant Engineer's license/Navy Engineering Officer/Scuba/Bottom Cleaning/Propellor polishing experience (I have all four). A steam driven ship will start the turning gear motor at least once a week to rotate the propeller shaft AND turbines AND reduction gears this keeps a "sag" from developing from all that weight staying in the same position for a long time. Additionally, a Steam Driven ship that goes into port (usually for 24 hours or less) shuts down the steam to the turbines, however all that metal is still HOT (usually 640 deg or better) and stays that way for a few days. The turning gear motor (or jacking gear) is turned on (engaged/clutched in) to rotate the propulsion train (turbines/reduction gears/prop) to allow it to cool evenly (in some cases verrrrry slowly - remember it is starting up again soon) and not let a droop develop. What you may not realize is that the clearance between the turbine blades and the turbine casing may only be a few thousands of an inch - so any droop or uneven cooling could have these blades hit the turbine casing on startup. Mats...I will have to tell you a story about 2 of my guys who were scared s**tless after they checked on a prop and etched their initials in it, then found out the ship was going directly to dry dock...grin
Hi John! Thanks for your comment. Hope ppl read it. And great story about you colleagues 😂 when I do anything on a ship I always assume they will ho directly to dry dock. Would be very embarrassing if they did and you did a poor job 😬
Have a great day buddy!
Hahahaha the supt is gonna have some fun lmao
Good to know.
We rotated the shafts on a regular basis on diesel ships too.
i work for Timken/Phily Gear. We make the turning gear for the DDG, LHD, LHA and LPD ships. Off the electric motor they are turning 900 to 1.
This is just my biggest fear ever, if that was me all the water around would be brown
Oh My GoD iS tHaT cArPaL wHaT aRe YoU dOiNg HeRe ? 😂
i would have a heart attack
I some one put a gun to my head and told me to jump off a huge ship (or amy ship) into the ocean i would tell them to shoot me. I wouldn't be able to do it
Everybody gangsta till the compressed air is shot into the Pistons
@@nadezhdalynxsnep161 underrated comment, should've been on main post lmao
I'm a little bit surprised about all comments about this being stupid and dangerous: "The ship could rev up the engine at anytime." That is not the case. We were WORKING on the prop. Polishing it with divers. So if you think it was stupid swimming around it. Then we could just tell the owners we can't supply our professional services either. It is the same propeller and they were not given back control of it between changing of divers. I.e. the divers (me) were in the same danger as me when I was working on the propeller.
This is not just some kids swimming up to a ship 10 nautical miles of shore having some fun. This was done under controlled circumstances.
I'm glad for all comments but please, read through some of them and you will find out a lot more about what was going on before you considered this dangerous.
Cheers!
90% of those watching this have never set foot on or even seen a steam ship. We still have them where i work and the jacking gear keeps them at the same pace you mentioned in the description. I wouldnt get in the water but i know the chance of someone disengaging the jacking gear, having steam supplied and unlocking the throttles for warm up are so low lol
This is the internet my guy. There's always going to be someone who has no knowledge and goes straight for the conclusion
@@vanz681 As well as the insatiable urge to be the first to post.......neglecting to even scan any related background information. It's so easy to weed out the ignorant in today's public forums.
Compliments and gratuity to the unsung heroes that keep machinery moving. These may just seem like huge oval dishes rotating on a shaft, but it can take years of engineering + development to get the three-dimensional curves just right to optimize propeller efficiency and thrust. Land Lubbers just don't realize the negative impact that barnacles and other marine life have by attaching themselves to the blades. Without ya'll performing vital maintenance, this world would grind to a halt.
You're entitled to entertain yourselves. It's kinda impractical to bring along some Danish treats & cup of coffee for a rest break. Also, I presume WiFi is rather unreliable. ...so, you improvise in a most positive fashion. Way to Go !!
Relax - people are shocked and scared even by looking at it. Most people do not have the cool to do what you do for living!
Just casually Swimming around the stern of a ship. NOPE
na fuck that shit bro
Read the pinned comment, it was controlled conditions, they were working on the ship
@@Slash1066 idgaf. Its a hard no from me boss. Lol
@@Slash1066 its submechanophobia - fear of man-made objects underwater (buoys props, sunken ships, rebar, chains) i dont care if it was controlled. that ship could whir to life any moment and kill him. FUCK NA
I was rescue swimmer a few times...swimming around ANY part of a big ship. Do it once, and you'll know...
To everyone being concerned about my health: this swim was performed under controlled conditions. A four hour meeting with work permit signed by London office. LOTO procedure was in place before anyone entered the water. This swim was for fun between dives when we were polishing the propeller. We monitored currents and nearby traffic at all time.
Stay safe, I do!
Pin this
@@limplayzcp haven't I already pined it? 🤔
with all that, still crazy ... additionally, I have this fear of being in the deep water close to a ship
hope you are safe ... ''home and dry'' ... or maybe a bit wet :)
Mats Bengtsson why no more uploads?
@@kevinmalone6955
the propeller did not miss this time, eh ??
This is both frightening and fascinating at once. It isn't so much the turning of the prop that scares me, it's being in the water with it...or anything that big. 9 meters in diameter...shit! The shaft must be 2 meters thick! Great vid...thanks!
I feel exactly the same way
the shaft is 2 meters thick? 😦
@@EastCoastPeace3 My shaft is 2 meters thick...;)
Submechanophobia, mate
I'm always scared of the big propeller on the end of a ship
When I was in the navy, that process was called “jacking the screw” or jacking the propeller.” It was done because of the weight of the shaft and screw. If it sat without turning for long periods, it could have a detrimental effect on the bearings under certain conditions.
Whilst that is true, if the engine is a steam turbine, when steam is being raised in the boilers, or when shutting them down, the turbines need to keep turning to avoid distortion of the turbine shafts due to uneven heating. Once the steam system is cold you can stop the turning gear. When steam is live the turning gear should be in and rotating, until the ship is nearly ready to depart. Then you take out the turning gear and give the engine a spin every few minutes using the main throttle.
Jacking the shaft is completely different right?
@@johnduffy7502 In the navy on steam ships the shaft is always on the jacking gear until 30 minutes prior to underway. Right before those 30 minutes we disengage the jacking gear and begin main engine warm up by spinning the ahead throttle valve to just under 5 rpm so that the ship doesnt move, close it. Then repeat the process with the astern throttle valve. Constantly alternating between the two for 30 minutes
@Flotzem lmao your pipes gon get clogged
The bearings will definitely go if the shafts aren’t turned on a regular basis. But far worse is the actual shafts being pitted by it. Trust me. I had to have the shafts of a 2-year old, 50-meter yacht replaced several years ago after learning that the boat sat at the dock for several months at a time in Tahiti before my time coming onboard. Guess what it costs to have an Air Singapore 747 cargo plane fly two Aquamet shafts for a 164 foot yacht to Auckland.
My one phobia in life is the bottom of ships hulls below the waterline. This really made my bum hole clench. The irony of this phobia is the fact that I actually live on a canal barge. If I ever have to have it out of the water to have maintenance done, I have to get a friend to do it for me. It's also the reason why I can't watch a certain scene from Indiana Jones and the last Crusade.
Could it be submechanophobia?
When the prop ruins that nice beautiful wooden boat? 😂😂
I have the same phobia and I bought a pontoon boat I use on the Hudson/NYS canal system.!! Another fear is going overboard in a lock.! I think it is worse now I’m older.
Kevin Morrison I hear you. I recently saw a barge that listed at 45° angle because of it being inappropriately placed in a lock and it made my bum hole quiver. There's also at the moment two rusty dredger barges birthed right next to me. I simply can't look at them when I'm either leaving or entering the boat.
mee too
Captain: Ok full speed ahead
no
*full speed astern*
Der Entsafter
Some about to get chopped like a spider on a lawn mower.
Thankfully it was a controlled environment
My anxiety just went through the f*****g roof😬
Because technically some Karen could report the comment
Nobody goes out of their way to do that bull crap anymore everybody knows that
Mine too
@gsxtr1 Oops, sorry to bother you Karen
@gsxtr1 Bold words from the one sitting in their basement insulting people for no particular reason
Engineer: clearance from the bridge to turn the shaft. Engage the turning gear and rotate the turbines.
This deserves 1k+ likes! 😂🙂
Aye Aye,Capt'n!
I'd imagine the turning gear is already on in this video
@@chuckromano859 I can't here you!!
@@potathooo Exactly, in accordance with Engineering Operating Procedures - MRTG Main Reduction Turning Gear. 👍
This is simultaneously very cool and slightly alarming. Like, I know it's totally safe, but it's still natural to feel uneasy around an object that would normally kill you instantly.
Not instantly
@@danielbarrett6960 does he really have to elaborate for you
@@calebbean7749 nah you'll be fucked pretty quick but not literally instantly
@@calebbean7749 and he's not going to even if that guy wants him to.
Congratulataions! You are an antisubmechanophobia man
Ikr I could never do this
The extremely low RPM is done by a jacking gear which serves to keep the shaft bearings and stuffing box lubed while discouraging the shaft from bowing.
Maybe on really old ships??... but usually these have lube oil systems. and the stuffing box is not part of a propulsion system??? (its part of a slow speed diesel)
What in blessed Hades is a stuffing box? It sounds dirty…
@@jaybee9269 Propeller shaft seal.
It's turning because they have the turning gear electric motor engaged. This is to allow all the propulsion machinery to cool evenly so nothing warps the alignment (It's not to keep it running)
Swear i learn more from TH-cam comments than highschool
Isn't it also to prevent the shaft bowing under its own weight, if it sits still for too long?
@@akimbojimbo3763 Yes.
It's bad when your shaft bows
I've never been able to explain it but I've always had a MASSIVE fear of being in the water around a prop, maybe it's cause I saw the titanic movie as a kid in the movies and that scene of the guy bouncing off the prop stuck with me who knows 🤷♂️
I have legit sat through that entire fucking movie just to see that one scene of the guy smacking it and spinning
I’m not sadistic but something about THAT ONE SCENE
That scene fucked with me too
@@dacksonflux The fact they took that little extra time to include the sound of him hitting it and no longer screaming too is just...damn...lol
@@jamesmaddison4546 Wait until you hear about the Titanic's sister ship the Britannic. It was a hospital ship that hit a mine during WW1 and started to sink. They were close to an island in the Mediterranean, so the Captain ordered them to try and beach the ship. Some of the crew lowered a life boat without permission, and it was on the side that was rising out of the water. When their boat drifted towards the back of the moving ship, one of the propellers was about halfway out of the water and still going full speed. Their lifeboat got sucked into it, killing most of the people in it. Those were the only fatalities of the whole sinking of the Britannic.
The thought of it is scarier than what it would probably be in real life. What makes it scary is not being able to adequately judge the proximity.
Man, this makes me scared shitless, even though I understand the conditions. You guys have the balls of steel to do this kind of work. I remember looking down at the Queen Mary's screw in the water thinking: I will not go in there ever.
It is said that the QM props and shaft balanced so well you could turn it with finger pressure. One is on display at Exposition Park, museum of natural history.
That scares the ship out of me . How brave.
Absolutely no way I could do this. Too many "what if?" scenarios in my head.
'Props' to him though.
Ah nice pun.. Props to you too.. 😀
I was frightening every second, thinking that propeller was about to start spinning at any time😥😥😥
Me toooo ! We watch too much YT 😂😹
"The last crusade" anybody?
Thank you......someone said it XD
Dudeee I watched that with my gf like a week ago and that’s exactly what I was thinking
"My souls ready Dr. Jones! How's yours?"
There is something super scary about being very close to a giant ship in the water. This is both insane and impressive.
So I’m just learning this is a real named phobia. I remember being on a small paddle boat with my dad and getting up close to the USS Torsk(a submarine with a shark face painted on it) in Baltimore harbor. I was so terrified. It felt like the diving planes were gonna come down on us at any second. I think anything big in murky water is scary but propellers are extra scary
Anything big objects would scare me like a fan with. Big blade or even bathroom fan
You are insane
You may have figured it out by now, but you're crazy
no hes not, the ship is stationary
My brain: it's okay ship propellers take a while to start spinning
My anxiety: _oh no he's going to _*_d i e_*
The terrifying part is that they really don’t take long at all
Nope if they want to go. You will have no time to react
It’s not that it taking a while to start. They’re leaving it spinning at a very low rate during cleaning
Man is fearless. I look at that with straight goosebumps
I saw the comments from OP stating just how safe he was doing this and that it was part of a (for him) routine job.
Either way, if it was safe or not.. fair play to these dudes for jumping in the water literally underneath a boat. Last time
I went on a jet ski I ended up a little close to a big ole shop like this. And i absolutely shit house bricks. My butt hole still twitches just thinking about the possibilities
Pretty tough guy I got ya must be exciting standing on the propeller!! Nice video clip!! Good luck and be Safe !!
that looks fun!! i'm always awestruck but the scale of those large vessels. Great respect to seamen too.. hell of a job
Why its scary if it's turning slowly or not at all?
Submechanophobia is a common phobia. www.theshipyardblog.com/single-post/2018/03/27/Submechanophobia---Do-You-Have-It
because what if it turns on
But it dont. I would jump behind if it starts turning :) in the line of the current. This is huge prop, it took some time to start spinning faster. What if what if, there is million situations in life what if, so i don't care. If i need to die from something, i can't avoid it :D
You are fucked if it turns on 🤣
@@flacjacket Interesting! Thanks for that. Never knew it was common.
We’ve all got one friend don’t we?
I read what the poster wrote. It’s just amazing and as a layperson I would be terrified to even be that close underneath a giant ship either at dock or open water.
“Identify range to target - one ping only pleasche...”
Give me a ping Vashilly...
I understand that reference!!
🤣
Nothing on this planet could get me in that water. Even if I was pushed in, I’d be so paralyzed with fear to get away from it.
makes no sense
Same here.
When these ships pass by the suck all the water out.
Last thing I want is to be chummed by the prop wash..
Keeps the bearings from going dry and reduces wear on the bearings.It looks like it may have one or two line shafts between the after thrust and tail shaft and that would mean at least two line bearings which are full contact surface bearings.Those bearings cost upwards of about $50,000/$75,000 a set,not including the cost to replace them(labor/equipment).The slow turning drag's oil from the sump in the housing and keeps it lubed so a quick start on a dry bearing don't burn or score the bearing surface.
There is no such thing as the "slow turning" keeping it lubed. There is usually a lube oil pump for a 50k-75k bearing. And no, you cannot tell how many propulsion bearings a ship has from looking at the outside?...
Imagine how scary it looks underwater
Polishing the prop underwater is a good specialized business. A clean prop saves tons of fuel on ships this size. It's also good from the standpoint of checking for damage to the propellers. The dynamics of large propellers require good balance. Loss of mass on any one point of a blade can cause rapid shaft wear or shaft log bearing from the imbalance. Frequent cleaning of props on boats of any size is good practice. Barnacle growth on small craft that can't be hauled out frequently can be easily accomplished with a variety of scrapers, doing an entire hull, the propellers, the exposed parts of the shaft, the rudder and all the through hull fittings in an hour or so, if the boat is frequently cleaned, (but hours and hours on boats that probably should be hauled out) with SCUBA or an umbilical "boat rig", (my preference, I had my local dive shop make mine up from one of my old SCUBA regulators) .... Some go all out and use a Mark IV system, an oil-less compressor putt putting away on the boat or dock, with the addition of underwater communications to a responsible and trained tender, a much safer way. At the dock or at anchor out on a mooring, try to time the tides to allow a moving tide remove floating debris, but not so much that a strong running tide tires you out, fighting it, where a dead low or high tide you have no visibility from the flotsam/detritus/crap in the water all around you.... I wear coveralls over a wet suit in cold water or just coveralls with warm water, enough weight to maintain near neutral buoyancy, good comfortable fins (!) , good gloves, mask and snorkel to save air when working up near the waterline, and a good dive light. Barnacle growth is sharp. PPE is a must. Charge whatever the market bears and you can make good money... always give the boat owner or the Captain a report of what you see, especially with the condition of the sacrificial elements (zincs) and any severely clogged through hull fittings ( "holes" leading to valves ) that have to be completely cleared to enable engine cooling, drainage of bilges, etc.. Shock cord (bungee) lanyards for everything so you don't lose stuff. Having a tender on board helps but working alone is doable, but can be dangerous and is not advised or legal if you are following safe dive practices and OSHA regulations as a business. If it's your boat or just doing it on a friend's boat, no problem. But, you already know all this stuff, right?
This will and more well put my anxiety at another level probably thru the roof landing in the moon
This is perfect example why the headline is most important part of a video for views
TH-cam wanted me to see this SO BAD it stayed at the top of my recommendations for 2 days. I finally watched it and I don't even understand what is happening.
I was on an Aircraft Carrier, and when we were underway I used to occasionally go to this one sponson toward the aft of the ship where you could look down into the water and see the murky shape of one of the gigantic props turning below the surface. It just gave me such a sense of dread, but at the same time I didn't want to look away. Fuck going overboard.
What ship were you on? The only carrier I’ve ever been on was USS Midway and she’s a museum ship now!
Some ships employ a low-horsepower electric motor which is engaged to slowly rotate the prop shaft when the plant is cold-iron. An engineer told me it's better to do this for the shaft seals when the ship is idle.
This scared me until I read the description. It's steam powered, so it can't instantly accelerate by accident and turn into the salad shooter.
You my friend, are rear: someone reading the description!
Everyone is gangster until the engine room “full speed ahead!”
Southern slang in the house!
Angel of death: well done hooman for making my work easier
The chills I feel here, the fear I have of water around any object in the sea has my toes curling
The thought of being in water near any large object is terrifying.
Reminds me of the old James Bond movies where the smaller out of control boat of the villians always got chopped up by the big ships propellers. Or, the under water fights ending with someone being sucked or pushed into a propeller.
WHEN HE JUMPED IN I THOUGHT IT WAS STARTING
props to this guy
Reminds me of the time my electrician uncle went to work in a high voltage box with the understanding that the electricity had been shut off. Unfortunately for him, someone screwed up that day.
Same happened to me! I was frozen! Fortunately the box was instantly OFF! A very odd odor for days following.
My dad did this we turned off the power to the basement but their was a wire my father was replacing them and moving them, turns out that wire went upstairs from a different breaker which didn't say anything about where wire went, thankfully the breaker blow before anything happened
Great video, I wish my superiors were courageous as you, as sailing as a 2nd assistant engineer on board cargo ships, many times wanted to do same at the anchorages but never been allowed to do so, wish I was onboard your ship.
Hes not a ship worker, hes a diver hired to polish the propeller. The reason nobody ever let you do it was you never had the permits now the 4 hour safety briefing or the training.
Well, good news is we all just found out we have a new phobia
Welcome to today's episode of 'places you'll never find me dead or alive'
I am just amazed he stayed afloat with those huge balls weighing him down
What a revolutionary way to have some shipyard fun!
Ba dum tisssss
@@ats-3693 th-cam.com/video/8eXj97stbG8/w-d-xo.html Two drums and a cymbal
@@spencerlukay5809 🤣 perfect, and that's a very youthful looking Tom Scott with his hippy/nerd ponytail 🤓
Now this is what I call "Prop Comedy!"
Lol but seriously
Allways impressed by the size
It’s crazy how this guy could stay afloat despite the weight of his enormous steel balls.
Used to dive to clean ship bottom paint, sea locker intakes, the overboards and the prop. Another diver was under his boat and he had signaled he was done, doing final check, when the (drunk) skipper asked if the diver was done, got the nod from a deckhand, then fired up the diesel. Buried the diver in pieces. Used to clean elevated water tanks, and a guy I didn't know thought he could do that too, had his intestines sucked out when he got too near the big outlet pipe at the tank bottom. Knew another diver who was searching for a cannery water intake in the murk, (this is so sick, I've done this twice, it's zero visibility, with a rope tugger to swim a search pattern,) anyway he found the inlet, got sucked in head first, ended up stuck about 30-feet into the pipe with his skin scraped off, and of course very dead. _Another true tale of Four Whi;te Ma;le Supre;macists who owe reparations for CRT, because Ku;nta Ke;ndi never got off his skinny a;ss._
Seams like a bad idea, but where would TH-cam be without bad ideas...? 🤔
Read his comment, everythhing is done in safe conditions because it is in maintenance mode.
Have you seen that video of the guy getting blown to bits cleaning a vat? That was in maintenance mode too. 🤷🏻♂️
@@tedspeed3338 Read his comment. 🤦🏼♂️ This guy has done a several hour maintenance in exactly this mode while the propeller has 0,2 RPM. 🤦🏼♂️
I sweat bullets, and I won't sleep for a couple of weeks. Thanks algorythm!
This is one of my biggest fears and I’m not even sure why
NO NO NO NO NAH.
don't be a pussy
Bruce Wayne Lets see you do it then, big man
WHYYYYYYYYYYYYYYYY DID YOU DO THAT?!?!
Since I was a child, I have had an irrational fear of 'large things in water'. This video freaks me out.
Same here.
Thats so creepy
”Kom, Oskar!” i helvete heller
Tänkte fan samma
Captain: full speed ahead
"full steam ahead!" and "aye aye, captain!" would have been far more interesting 😆
Is .2 rpm the normal rotation to avoid sagging? I'm in my mid-30s and I think I'm starting to notice a slight droop in my shaft. Do I turn it clockwise or counter???
Nothing friggin moved! No riding anything from what I saw in the whole 33 seconds.....
If the propeller does one turn i five minutes and has a diameter of 9.2 meters, how far does the tip move in 33 seconds? From your way of writing I assume you're not the brightest person commenting here. I'll do the math for you: it moves 3 meters during this clip. The prop is under water, you can't see it. You will have to trust my word when I say it IS MOVING.
I'm not posting anything here for likes or shit. I.e. your comment doesn't ad anything other than that it makes me tired of people like you.
I have a clip from under water when filming the root of the propeller. Will post that in due course. When I have time, which I don't have too much of atm.
You just stole a couple of minutes of my time from me.
Mats Bengtsson
You fucking savage man that’s just a comeback to destroy the rest
@@mrmcmoustache9615 thanks buddy!
@@MatsBengtsson : then show that 30sec. You can not be a joke to the rest of us if it's such easy math. So clickbait is easier for you.
"Sir, we saw the video of you swimming by the propeller of a large ship and we just called to say we have canceled your life insurance policy."
Mr Ballen:Today we're gonna talk about three places you shouldn't go but people went there anyway.
Ground beef anyone? Propeller sliced and fresh!
If you want true ground beef I recommend the jet engine of a plane
This is actually the safest place around a boat! This video encourages me to try this on every big boat when they are just about to start💚
Everybody gangsta until the propellers start turning
Those big props surprisingly spool up fast
no thanks im good
Submechanophobia eeeek.
The only part of a ship I'm terrified of is the lower stern. That's where the propellers/water jets are and both are equally deadly.
Suddenly the chief engineer just full throttled it🤣🤣
I'm here to be there only English comment. Hello
you're far from being the only english comment
There is something wrong with you, LOL.
Okay, that looks mildly terrifying
Tbh i expected you'd be holding onto it with it windlmilling around, but this is sweet and most likely more sane xD
I would love to try but can't hold my breath for that long. One turn takes about 5 minutes 😅
"There are divers over the side, do not rotate screws, cycle rudders, take suction from, or discharge to the sea."
This is literally my biggest fear and why I could never swim around a boat lol
I tie up ships as my job. I was going to rip in about the stupidity of being there as I’ve been on the receiving end of prop wash too many times, but I read the intro & was glad you took your safety seriously. Welcome to my office.
Haha! Thanks for taking your time reading the description 🙂
Crazy daredevil even with precautions in place.
My man has balls of brass!
This is cool. Thanks for sharing.
OK...there's goofing between shifts, and then there's epic goofing between shifts. Thanks for the u ique video!
That looks so cool. I’d be fking awesome to experience that.
Captain: turn on the propeller
This is badass
This is one of those things that lack of knowledge creates fear. I myself know nothing about ships so it's seems scary as hell to me
Finally, a worthly opponent to de 3min guy that sanks with his boat and sees a tiny cute spider
Just the shear size of the SHIP, the thought of swimming around under it AND with the prop moving, gives me a weird claustrophobic feeling!