Something I'd like to know, maybe for a future vide: How did/do ship builders manage to get a watertight fitting around the rotating shaft of a propeller through the hull into the engine room?
It would have been a stuffing box, an area around the shaft stuffed with jute or other fibers, possibly along with grease or other thick lubricant, and then compressed around the shaft. Often times, especially on bigger ships, this was *not* designed to be perfectly water tight, as a small trickle of water flowing through the gasket would help manage heat buildup and keep the stuffing box from overheating and potentially igniting from all the friction. The small dribble of water would be easy to collect in a sump or bilge area and pump out. I too would be interested in learning exactly what type of stuffing box Titanic and other large ships of the time used, and if there were any interesting quirks or experimentation as compared to modern stuffing boxes.
Yeah, they basically just pack it with wool and oil or something and crank down the bolts around it. In modern ships, there are slightly more elegant solutions, involving pumps and things. I don't know. This is oceanliner designs, not oceanliner engineering.
I'm upset with my eyes right now, because in the opening animated clip showing the propellers spinning under the water, it shows the central propeller rotating in a "Reverse" setting, while the port propeller is rotating in a "Forward" setting, due to the pitch of the blades on the model of the central propeller. But hey, getting to watch one of these right after it releases is a treat for sure, always love the way you and your crew do these videos!
I guess they might send an ultrasound scanner down there some day in the future, not only to visualize the state of the unreachable interior, but also to settle the screws debate
Makes sense to have two for a new design. Run both ships for a year, pick the prop that makes everyone happy, and go with it. I wonder if there are sensors currently, or in the pipeline, that could go down and find out which screw was used. And vibrations can be rough. Never been out to sea, but spent years on C-130's. Tracking down vibration issues is a pain. And usually the first indication we got for them was the crew and pax having headaches. Then you bring in special equipment. But the one thing I will take away from this video is the image in my head of a posh gentleman arguing with a poor waiter that he ordered his tea MIXED with milk, while the waiter is calmly explaining "The milk is right there Sir, in the cup, right next to the tea."
I totally agree. Every time I hear this at the beginning of each of his videos, I feel like I'm settling into a big, comfy leather chair in front of a fireplace with a snifter of Brandy, enjoying a quiet conversation.
It's our friend, Mike Brady! (I post this comment in good natured humor, but honestly there have been days when Mike saying he's my friend really lifted my spirits.)
There's one way to settle the debate on the number of blades. In 1996, they used underwater sonar technology to locate the iceberg damage in the bow. So why not employ the same technology and locate the centre prop to determine the number of blades? My money is on 3 blades. 😁 Keep up the great work as always, Mike 👍
They don't really need to do this. The hull damage from the iceberg was not fully understood, but we can make an educated guess as Mike has shown to work out that it's highly likely if not completely likely that Titanic had a 3 bladed turbine screw. I think it's also very likely the 3 bladed turbine screw design on Titanic, was the one used on Olympic after her 1913 refit, because they will have wanted to see how the original design responded before modifying it.
@RetroGamingLite I agree with you that the historical evidence points favourably towards Titanic having a triple bladed centre prop, but there are some people out there who just won't be satisfied until it's proven beyond doubt. Sonar technology has come on leaps and bounds since 1996, perhaps it's time to get a better look beneath the silt and find the centre prop, and while we're at it, rescan the starboard side of the bow and try to get a better look at the iceberg damage. 👍
The easiest way to put the matter to rest is to do ultrasound scans of the area, just as was done on the bow to locate the iceberg damage that was buried in the mud. Even if one or more blades is broken off from the impact, it should be possible to tell how many blades were there.
It's a conspiracy from model manufacturers! Now I'll have to go buy an extra Titanic model just to have the correct number of three bladed propellers! 🤣
They used to sell 3D printed ones online for most of the popular model kits so people can make the models accurate. The 1/200 Trumpeter kit offers a choice of a three bladed or four bladed center propeller.
Large ship propellers have always been fascinating and scary at the same time to me. The thought of getting sucked into a turning prop has always been a fear of mine lol! Awesome video once again Mike!
Hello, Mike! Thank you so much, it was very interesting! What an enormous ship details! How engineers could design it without any CAD systems, it's absolutely genius! I really liked the retro blueprints in the video. I saw such huge blueprints (from 1930's) with moments of inertia calculations for better stability when ship takes passengers and cargo on board, it's very exciting.
WHY have people been joking about this lately. He's always said that, and it's extremely nice and normal. I guess these days just being a normal and polite human being is something to comment 500 times.
I agree with it being a typo. Ships screws have a fairly long lead time. Casting ships screws is not quick process and changes would have delayed Titanic's launch. I suggest a detailed review of records from company that cast and finished the central screw.
I have always been more of an aviation type man with an interest in naval matters. Your videos have yet again sparked this particular interest I've had for so long the maritime world has always fascinated me and I'm grateful to have found your channel. Please continue to make these videos my friend you're making simple men like me very happy with your knowledge and insight. Not to mention your videos are simply insanely awesome! Keep it up!
Just a thought ... but Titanic's central turbine rpm was roughly 180 revs per minute while the outer reciprocating engines were 80 or so So wouldn't you need an extra blade on the turbine driven prop to 'absorb' the extra power - or at least a different size, pitch, whatever. Or doesn't it work like that ? !!
I fly RC models and back in the day the hardcore speed guys, especially in control line, used to fly with single-blade props to min/max everything. It was crazy seeing a prop gun with a blade on one side and a big counter weight on the other...
Extraordinary, Mike. I’m so fascinated by the work you put into all of your compelling videos. Thank you for sharing. I always assumed that Titanic had 4.
Experimentation of this type happened in other industries at this time. Locomotive fireboxes were built with a round top. But in 1864 the Belgian inventor Alfred Belpaire came up with the squire topped firebox. This increased the surface area which improved the heat transfer compared to the round top. The downside was the increased expense and though most British locomotive used the Belpaire firebox after the 1920s the London and North Eastern Railway did not.
There’s a photo of the Titanic in a dry dock from february 1912. In the background on the ground is lying an object which is simmilar to the propeller. An analys (not official one) points out it was in fact a propeller which had to have three blades.
Wahey another one ❤🎉. Cheers Mike and the rest of the crew at oceanliner designs! I’ve become addicted! If you ever visit the maritime at Greenwich again/come to London, I’d love to buy you all a drink! 🍸🍺
Propeller vibration problems plagued ships throughout the years. The SS Normandie had vibration issues which required changing her screws several times. The USS North Carolina class and South Dakota class battleships also had vibration issues. Some had three and four bladed screws, some tried three and five, and other four and five blades in various attempts to cure vibration issues with the ships.
How did design documentation and building progress notes not survive at Harland and Wolff that would definitively state what her central propellor was? Surely any changes to her design would have been noted down somewhere. Thomas Andrews surely left documentation and notes behind him if the shipyard for some reason didn't think to note down the change in propellor type? It's quite bizarre.
Hello. 00:42 - There is an error in your animation with the middle propeller. Judging by the design of the blades and the direction of rotation, the animation shows that the propeller is working for the back direction moovement of the vessel. As we remember on the Titanic, the middle propeller was only capable of working in forward direction moovement of the vessel. Judging by the photographs of the Olympic, the design of the blades of the middle propeller is correct, in your animation. This means that in your animation, the propeller is rotating in the wrong direction. Good luck!
Interesting. Olympic in drydock at 7:25 looks to have damage to her plating just forward of centre screw boss, like something collided and dragged along the plating for 15 or 20 feet. At 8:50, in a shot from a different angle and time, there's no damage so she wasn't built that way. I wonder what caused the apparent damage at 7:25?
Notre ami Mike qui poste lorsque je vais faire dodo. Bon, je visionnerais ça demain. En tout cas ayant plusieurs Titanic, j'alterne entre 3 ou 4 pales 😅
There should be a way to image the parts of Titanic that are under the silt to put this issue to rest and check whether the buried part of the bow is crumpled or intact.
Remember that many pictures of Olympic where used for Titanic because not many pictures were taken of Titanic. Both ships are not 100% identical as they have some changes
This is just speculation on my part, but would it possible to use a ROV with an underwater version of ground-pebetrating radar? That way the propellers can be studied without disturbing the shipwreck. Like I said, this is just speculation and I am not an expert in these matters.
As cheezy as it may sound I think it's fair to proclaim that the Fellowship of the Friends of Mike Brady are impressed by the way Mike Steers and ' Propels' these OD Videos. Thank you Mike. Marvelous work 🤗👍
With my personal experiences, I find that 4 blade are more efficient for pushing slower heavy loads. 3 blade's are better for light loads top end speeds.
@OceanlinerDesigns What do you make of the theory that the object Jack Grimm found in 1981 was actually a thrown blade from Titanic's starboard propeller? Would you be interested in making a video about the possibility of Titanic throwing a blade during or after the collision, and whether available evidence suggests there is one missing from the starboard prop?
Why did anyone tried to give Olympic 4 bladed outboard propellers? That would have been probably the best possible option, probably also gaining 3 or 4 knots extra
I wonder if it'd be possible to use some sort of radar or other imaging technique on a submersible to get a better 'look' at it. They've done similar things to Egyptian pyramids before.
Whatever kind of propeller You design/use, I think ONE consideration must no be forgotten: resonance. If You have one propeller, this is not a problem. If You have two, that may com into factor. Three and above? I'd say is hell on earth. If You have a four propelled ship, make sure that You have two different sets. If all of them are similar, resonance WILL be a serious problem. A three propelled ship... I'm not so sure. I think You could get away with a smaller central one - although didn't made much good in this case. It's quite a hard problem to solve.
The cost of trying different propellers must have been horrific. The thought of "well guys lets pull this 800 +/- foot ship out of the water and try some different propellers for to see what happens" seems like a lot of money to spend. I wonder if the new designs were tried out in scale first????? Another great watch from Mike
I'm guessing they would have done the propeller swaps when they were drydocking the ships for other reasons like refits and maintenance or inspection. Olympic had her 4 bladed screw swapped for a 3 bladed one during her 1913 refit and it remained in place until it was swapped back in 1919 after the war.
@@RetroGamingLiteprobably so. 1919 is also when it switched to burning oil rather than coal. I'm sure things were quite researched before making any big adjustments, but you never quite know.
Still not sold on the 3 Blade center propeller theory. When James Cameron made Titanic he was painstakingly meticulous with his research. Even in subsequent documentaries that were produced in the years following the movie neither he, nor any of the experts he hired ever mentioned a 3 Blade Center prop even in theory. This is a pretty substantial detail to be overlooked after all the years and experts who have spent their careers researching the ship. If I'm not mistaken the Britannic has a 4 Blade center prop. You would think since the ship builders weren't able to get the performance figures from the Titanic they'd fit Britannic out with a 3 Blade prop instead of a 4 Blade one to see how she'd perform.
Fellow ship enthusiasts, our Great Friend Designs Mike from Bradyliner Ocean has returned again. Jokes aside, i wonder if there's any survivor testimony as to what the popellers looked like, its highly unlikely but if it is out there, it could probably end the mystery.
The mystery of the Central propeller will be solved once the stern section is dissolved away in the next 25 years then at that time in the future the Central propeller mystery is solved
3 blades?! Blasphemy! Joking. Though it does sound like the kind of doctrinal argument you hear about in religious disputes, the 3-bladers vs 4-bladers!
Here is some advice about dealing with people who believe in conspiracy theories "Never argue with fools. They will drag you down to their level and beat you with experience
At 3:42 you say that the shakiest of ships was the Lusitania. I beg to differ! I was on the Norwegian Escape on the first cruise after it accidentally grounded in the Dominican Republic a few years ago, and I am SURE that it had a bent propellor! We had an aft cabin and at sea the glasses on on counter were chattering so bad we had to put a towel underneath them, and I was actually woken up a few times by the vibration, which was VERY noticeable....
Something I'd like to know, maybe for a future vide: How did/do ship builders manage to get a watertight fitting around the rotating shaft of a propeller through the hull into the engine room?
Indeed!
They cram it full of dogs.
It would have been a stuffing box, an area around the shaft stuffed with jute or other fibers, possibly along with grease or other thick lubricant, and then compressed around the shaft. Often times, especially on bigger ships, this was *not* designed to be perfectly water tight, as a small trickle of water flowing through the gasket would help manage heat buildup and keep the stuffing box from overheating and potentially igniting from all the friction. The small dribble of water would be easy to collect in a sump or bilge area and pump out.
I too would be interested in learning exactly what type of stuffing box Titanic and other large ships of the time used, and if there were any interesting quirks or experimentation as compared to modern stuffing boxes.
Yeah, they basically just pack it with wool and oil or something and crank down the bolts around it. In modern ships, there are slightly more elegant solutions, involving pumps and things. I don't know.
This is oceanliner designs, not oceanliner engineering.
@@theBlankScrollDog the hatches
I'm upset with my eyes right now, because in the opening animated clip showing the propellers spinning under the water, it shows the central propeller rotating in a "Reverse" setting, while the port propeller is rotating in a "Forward" setting, due to the pitch of the blades on the model of the central propeller.
But hey, getting to watch one of these right after it releases is a treat for sure, always love the way you and your crew do these videos!
😄 I noticed that too. The blade pitch is right, but the direction of rotation isn't. Oh well, it's still a cool-looking animation.
Fortunately, those propellers would be the few pieces that will survive after Titanic rusts away.
1:10 "Screws": In German they are still called "Schraube" or "Schiffsschraube" which directly translates to "screw" or "ship's screw".
I guess they might send an ultrasound scanner down there some day in the future, not only to visualize the state of the unreachable interior, but also to settle the screws debate
It would need to be very powerful in order to penetrate the 50 ft of silt that the rudder is buried in.
Agreed and when they do they will discover that the Titanic has a 4 bladed prop
@@anthonylowder6687 I see your four blades and I raise you FIVE blades.
If it were a 3 Bladed Propeller, and we could get to it, it would be more evidence against the stupid switch theory
People will write anything to sell a book I suppose. I wonder if Robin Gardiner even believed what he wrote.
@@rrice1705Probably not, he just wanted the money most likely. Some people will do anything for that green paper.
I thought exactly the same about the ridiculous switch theory.
Always has to be someone out there to start stupid conspiracy theories
We aren’t that lucky lol. Though I’m curious as to the condition of the center propeller, especially having been buried for so long.
'Shaking the milk out of your passenger's tea', our friend Mike Brady is a pure and gentle soul who must be protected at all costs.
“Protected”? Why? Are there threats against his life? Is he particularly fragile? 🤦🏻♂️
@@Frankie5Angels150 I'm 45 and I just cringed on behalf of my children reading your post.
I’m guessing another crawler.
@@xr6lad Don't be weird.
@@LotusDecal I cringe every time someone writes what you wrote.Were you clutching your pearls when you wrote that.
Makes sense to have two for a new design. Run both ships for a year, pick the prop that makes everyone happy, and go with it. I wonder if there are sensors currently, or in the pipeline, that could go down and find out which screw was used.
And vibrations can be rough. Never been out to sea, but spent years on C-130's. Tracking down vibration issues is a pain. And usually the first indication we got for them was the crew and pax having headaches. Then you bring in special equipment.
But the one thing I will take away from this video is the image in my head of a posh gentleman arguing with a poor waiter that he ordered his tea MIXED with milk, while the waiter is calmly explaining "The milk is right there Sir, in the cup, right next to the tea."
I like the intro that says “I’m your friend, Mike Brady”; it comes across as genuinely sincere and welcoming 👍
I totally agree. Every time I hear this at the beginning of each of his videos, I feel like I'm settling into a big, comfy leather chair in front of a fireplace with a snifter of Brandy, enjoying a quiet conversation.
Shaking the milk out of your passenger's tea... ... ... I ❤ that
Good one Mike.
It's our friend, Mike Brady!
(I post this comment in good natured humor, but honestly there have been days when Mike saying he's my friend really lifted my spirits.)
Happy to be here with our friend Mike Brady!
Picard, strapped to a chair: "THERE ARE FOUR BLADES"
Spicer Lovejoy, teaspoon stuck to his forehead: _"I'm sorry, sir, but I just don't understand how you can be so wrong."_
What blades?
There's one way to settle the debate on the number of blades.
In 1996, they used underwater sonar technology to locate the iceberg damage in the bow.
So why not employ the same technology and locate the centre prop to determine the number of blades?
My money is on 3 blades. 😁
Keep up the great work as always, Mike 👍
They don't really need to do this. The hull damage from the iceberg was not fully understood, but we can make an educated guess as Mike has shown to work out that it's highly likely if not completely likely that Titanic had a 3 bladed turbine screw. I think it's also very likely the 3 bladed turbine screw design on Titanic, was the one used on Olympic after her 1913 refit, because they will have wanted to see how the original design responded before modifying it.
@RetroGamingLite I agree with you that the historical evidence points favourably towards Titanic having a triple bladed centre prop, but there are some people out there who just won't be satisfied until it's proven beyond doubt.
Sonar technology has come on leaps and bounds since 1996, perhaps it's time to get a better look beneath the silt and find the centre prop, and while we're at it, rescan the starboard side of the bow and try to get a better look at the iceberg damage. 👍
The easiest way to put the matter to rest is to do ultrasound scans of the area, just as was done on the bow to locate the iceberg damage that was buried in the mud. Even if one or more blades is broken off from the impact, it should be possible to tell how many blades were there.
Yes and it will show that the Titanic center screw was a 4 bladed one
A mystery unsolved.. until now.
It's a conspiracy from model manufacturers! Now I'll have to go buy an extra Titanic model just to have the correct number of three bladed propellers! 🤣
Don’t waste your money the Titanic’s central propellor was a 4 bladed prop so your model is correct
They used to sell 3D printed ones online for most of the popular model kits so people can make the models accurate. The 1/200 Trumpeter kit offers a choice of a three bladed or four bladed center propeller.
Large ship propellers have always been fascinating and scary at the same time to me. The thought of getting sucked into a turning prop has always been a fear of mine lol! Awesome video once again Mike!
Have you heard about Violet Jessop?
ruclips.net/video/QIPMfHUIVvk/видео.htmlsi=HrsfS3cvujLApY8m
"There are four lights, er, i mean blades!"
I'm just wondering... if damages caused by iceberg were maped via ultrasound survey why we can't use same technology to check middle propeller?
Hey! It's our friend, Mike Brady! From Oceanliner Designs!
Hey it’s another person repeating something hoping to attract attention
@@xr6lad hey it’s some party pooper probably wanting some attention too!
@@xr6ladhope you pull that wooden plank from out your knickers, mate
We were talking about this at work last night. I work with fellow Titanic nerds and this very topic came up on our 15 minute break!
Glad you covered this, that notebook was a good find in the 2000’s!
A find maybe but a definite fake
@@anthonylowder6687 "That's a nice argument, commenter, but why don't you back it up with a source?"
Our friend Mike Brady
Loser
I missed it and had to go back and get my fix
@@jamesmcglough5985 loser
Love the titanic stories
Hello, Mike! Thank you so much, it was very interesting! What an enormous ship details! How engineers could design it without any CAD systems, it's absolutely genius! I really liked the retro blueprints in the video. I saw such huge blueprints (from 1930's) with moments of inertia calculations for better stability when ship takes passengers and cargo on board, it's very exciting.
Good evening, folks-it’s our friend Mike Brady from Oceanliner Designs.
I actually say "hi" out loud to my laptop lol.
WHY have people been joking about this lately. He's always said that, and it's extremely nice and normal. I guess these days just being a normal and polite human being is something to comment 500 times.
Seriously? Another bot comment..
Yay!
@@Reimu__Hakurei stupid kids wanting to get likes with unoriginal comments
I agree with it being a typo. Ships screws have a fairly long lead time. Casting ships screws is not quick process and changes would have delayed Titanic's launch. I suggest a detailed review of records from company that cast and finished the central screw.
Thank you….at least someone is thinking right!
I have always been more of an aviation type man with an interest in naval matters. Your videos have yet again sparked this particular interest I've had for so long the maritime world has always fascinated me and I'm grateful to have found your channel. Please continue to make these videos my friend you're making simple men like me very happy with your knowledge and insight. Not to mention your videos are simply insanely awesome! Keep it up!
Just a thought ... but Titanic's central turbine rpm was roughly 180 revs per minute while the outer reciprocating engines were 80 or so
So wouldn't you need an extra blade on the turbine driven prop to 'absorb' the extra power - or at least a different size, pitch, whatever.
Or doesn't it work like that ? !!
The central propeller was smaller for exactly that reason. A little surprised the video didn't specifically point that out.
So that’s why Titanic had a three bladed center propeller blades and on Olympic and Britannic they had four bladed central propellers
No don’t accept this lie the Titanic had a 4 bladed prop
The animation at 7:40 messed with my head. The pitch and rotation indicate reverse while the bubbles say forward.
I fly RC models and back in the day the hardcore speed guys, especially in control line, used to fly with single-blade props to min/max everything. It was crazy seeing a prop gun with a blade on one side and a big counter weight on the other...
6:20 - Whoops
Titanic was such an elegant looking ⚓ ship
Extraordinary, Mike. I’m so fascinated by the work you put into all of your compelling videos. Thank you for sharing. I always assumed that Titanic had 4.
Experimentation of this type happened in other industries at this time. Locomotive fireboxes were built with a round top. But in 1864 the Belgian inventor Alfred Belpaire came up with the squire topped firebox. This increased the surface area which improved the heat transfer compared to the round top. The downside was the increased expense and though most British locomotive used the Belpaire firebox after the 1920s the London and North Eastern Railway did not.
There’s a photo of the Titanic in a dry dock from february 1912. In the background on the ground is lying an object which is simmilar to the propeller. An analys (not official one) points out it was in fact a propeller which had to have three blades.
Wahey another one ❤🎉. Cheers Mike and the rest of the crew at oceanliner designs! I’ve become addicted! If you ever visit the maritime at Greenwich again/come to London, I’d love to buy you all a drink! 🍸🍺
Propeller vibration problems plagued ships throughout the years. The SS Normandie had vibration issues which required changing her screws several times. The USS North Carolina class and South Dakota class battleships also had vibration issues. Some had three and four bladed screws, some tried three and five, and other four and five blades in various attempts to cure vibration issues with the ships.
How did design documentation and building progress notes not survive at Harland and Wolff that would definitively state what her central propellor was? Surely any changes to her design would have been noted down somewhere. Thomas Andrews surely left documentation and notes behind him if the shipyard for some reason didn't think to note down the change in propellor type?
It's quite bizarre.
Never missed a video
Hmm… if Lusitania shook so much, perhaps they should have tightened her ‘Tania… (sounds dirtier than I meant it!)
You know who knows? - Mr. Andrews. You just have to buy him a drink - and hold the ice...
Hello.
00:42 - There is an error in your animation with the middle propeller. Judging by the design of the blades and the direction of rotation, the animation shows that the propeller is working for the back direction moovement of the vessel.
As we remember on the Titanic, the middle propeller was only capable of working in forward direction moovement of the vessel.
Judging by the photographs of the Olympic, the design of the blades of the middle propeller is correct, in your animation. This means that in your animation, the propeller is rotating in the wrong direction.
Good luck!
Awesome video Mike Brady well done ❤
love your videos Mike, especially any about the Titanic
That prop animation makes me wish I could put it on loop with sound. I could play that for hours while I'm working.
Hi Mike
"Titanic Text Messages - A Streaming Log of Distress Transmissions" Long and harrowing.
We pondering about history with this one 🗣️🗣️🗣️🗣️
Do I hear the Swedish music piece "Värmlandsvisan" in the intro? :)
Great video!
Interesting. Olympic in drydock at 7:25 looks to have damage to her plating just forward of centre screw boss, like something collided and dragged along the plating for 15 or 20 feet. At 8:50, in a shot from a different angle and time, there's no damage so she wasn't built that way. I wonder what caused the apparent damage at 7:25?
I cant believe these propellers are bigger than my ceiling fan lmao
Notre ami Mike qui poste lorsque je vais faire dodo. Bon, je visionnerais ça demain. En tout cas ayant plusieurs Titanic, j'alterne entre 3 ou 4 pales 😅
Raise the propeller!
>:( me when no four bladed screws ( its alr)
There should be a way to image the parts of Titanic that are under the silt to put this issue to rest and check whether the buried part of the bow is crumpled or intact.
It’s only 3 minutes and it has 24 comments and it has 260 views💀
Gotta get that opinion in there before watching
No one cares
@@chriswakefield9538 yes
We're a group who likes our Ocean Liner Designs!
I got here in 2 minutes of notification 😂I really enjoy all your work please keep it up
If they fitted a four blade central prop, would it have made the Titanic faster? If so, could it have passed the slow moving iceberg without incident?
6:19, I don’t know if this is an editing issue - but you’re repeating yourself here, Mike 😅
Is it just me or do the propellers in the 97 movie look massive during the breakup scene?
Remember that many pictures of Olympic where used for Titanic because not many pictures were taken of Titanic. Both ships are not 100% identical as they have some changes
Hey, it's our friend Mike Brady from Oceanliner Designs
This is just speculation on my part, but would it possible to use a ROV with an underwater version of ground-pebetrating radar? That way the propellers can be studied without disturbing the shipwreck. Like I said, this is just speculation and I am not an expert in these matters.
It's to bad they couldn't clear the mud around the center screw of Titanic. Then this question would be solved!
As cheezy as it may sound I think it's fair to proclaim that the Fellowship of the Friends of Mike Brady are impressed by the way Mike Steers and ' Propels' these OD Videos. Thank you Mike. Marvelous work 🤗👍
With my personal experiences, I find that 4 blade are more efficient for pushing slower heavy loads. 3 blade's are better for light loads top end speeds.
Wouldnt it be possible to get a sonar or xray scan on the wreck to answer the question?
The cost would be astronomical just to satisfy the curiosity of a (relatively) tiny number of people.
Screw it. Titanics getting 12 blades
@OceanlinerDesigns What do you make of the theory that the object Jack Grimm found in 1981 was actually a thrown blade from Titanic's starboard propeller? Would you be interested in making a video about the possibility of Titanic throwing a blade during or after the collision, and whether available evidence suggests there is one missing from the starboard prop?
Why did anyone tried to give Olympic 4 bladed outboard propellers? That would have been probably the best possible option, probably also gaining 3 or 4 knots extra
I wonder if it'd be possible to use some sort of radar or other imaging technique on a submersible to get a better 'look' at it. They've done similar things to Egyptian pyramids before.
If I had a dime for every time your videos were Wikipedia checked by RUclips I could retire. LoL🤣
What can't they use a ground radar that goes through the silt and reflects of hard surfaces
$$$
@rrice1705 not that expensive much less than a sub
Whatever kind of propeller You design/use, I think ONE consideration must no be forgotten: resonance.
If You have one propeller, this is not a problem.
If You have two, that may com into factor.
Three and above? I'd say is hell on earth.
If You have a four propelled ship, make sure that You have two different sets. If all of them are similar, resonance WILL be a serious problem.
A three propelled ship... I'm not so sure. I think You could get away with a smaller central one - although didn't made much good in this case. It's quite a hard problem to solve.
36'9" propellers on Olympic? I don't think I've ever heard of bigger on any ship?
The cost of trying different propellers must have been horrific. The thought of "well guys lets pull this 800 +/- foot ship out of the water and try some different propellers for to see what happens" seems like a lot of money to spend. I wonder if the new designs were tried out in scale first????? Another great watch from Mike
I'm guessing they would have done the propeller swaps when they were drydocking the ships for other reasons like refits and maintenance or inspection. Olympic had her 4 bladed screw swapped for a 3 bladed one during her 1913 refit and it remained in place until it was swapped back in 1919 after the war.
@@RetroGamingLiteprobably so. 1919 is also when it switched to burning oil rather than coal. I'm sure things were quite researched before making any big adjustments, but you never quite know.
Can you make a video on the story of Titanic’s two wireless operators, Jack Phillips and Harold Bride?
Kool! Thank you
Still not sold on the 3 Blade center propeller theory. When James Cameron made Titanic he was painstakingly meticulous with his research. Even in subsequent documentaries that were produced in the years following the movie neither he, nor any of the experts he hired ever mentioned a 3 Blade Center prop even in theory. This is a pretty substantial detail to be overlooked after all the years and experts who have spent their careers researching the ship. If I'm not mistaken the Britannic has a 4 Blade center prop. You would think since the ship builders weren't able to get the performance figures from the Titanic they'd fit Britannic out with a 3 Blade prop instead of a 4 Blade one to see how she'd perform.
He made a lot of mistakes…
The Olympic was fitted with a 3 bladed propeller for a time …
Fellow ship enthusiasts, our Great Friend Designs Mike from Bradyliner Ocean has returned again.
Jokes aside, i wonder if there's any survivor testimony as to what the popellers looked like, its highly unlikely but if it is out there, it could probably end the mystery.
titanics middle screw was slightly larger diameter than olympic according to builder specs. assumed it was 4 blade as her sisters.
I've got submechanophobia, so this will be fascinating horror for me 🥶
What are the chances we’ll one day develop deep sea imaging technology to assess the unseen blade configuration?
Hey
Titanic community: "Titanic's central propeller Four blades or three which is it?"
8:08 This reminds me of Titanic: Honour and Glory animations. Is it?🤔
Yo
Thumbs upgreat video here comes all the engineers
Everyone knows Titanic's central propeller had 5 blades.
The mystery of the Central propeller will be solved once the stern section is dissolved away in the next 25 years then at that time in the future the Central propeller mystery is solved
3 blades?! Blasphemy!
Joking. Though it does sound like the kind of doctrinal argument you hear about in religious disputes, the 3-bladers vs 4-bladers!
Personally I like the single blade props for planes! Yes they’re real!
Did the ship torque in one direction or was it just big enough to not notice?
Here is some advice about dealing with people who believe in conspiracy theories
"Never argue with fools. They will drag you down to their level and beat you with experience
Swedish national anthem at the start. 😄 (Du gamla, du fria).
At 3:42 you say that the shakiest of ships was the Lusitania. I beg to differ! I was on the Norwegian Escape on the first cruise after it accidentally grounded in the Dominican Republic a few years ago, and I am SURE that it had a bent propellor! We had an aft cabin and at sea the glasses on on counter were chattering so bad we had to put a towel underneath them, and I was actually woken up a few times by the vibration, which was VERY noticeable....
But…..I don’t think you have been on the Lusitania for comparison 🤔？