The right hand one boat is much more exposed to waves.. also it sheltered the stabilized one..! not good for comparison...??!!Quote:
Originally Posted by Jon
Printable View
The right hand one boat is much more exposed to waves.. also it sheltered the stabilized one..! not good for comparison...??!!Quote:
Originally Posted by Jon
<video controls autoplay loop>
<source src="https://diqn32j8nouaz.cloudfront.net/giant_pipes_swaying_on_ship.mp4" type="video/mp4">
Your browser does not support the video tag.
</video>
way too many guys in the hold just standing around like a bunch of dullards.
Only 1 tag line is never a good recipe
The Bessemer Saloon Steamship, a gimbaled steamship invented by Henry Bessemer, a prolific (100+ patents) inventor in 1868. Bessemer invented this type of ship to combat his seasickness. It worked nicely in model form, but was never built fullsize.
https://diqn32j8nouaz.cloudfront.net...er_saloon1.jpg
https://diqn32j8nouaz.cloudfront.net...er_saloon2.jpg
https://diqn32j8nouaz.cloudfront.net...er_saloon3.jpg
https://diqn32j8nouaz.cloudfront.net...er_saloon4.jpg
https://diqn32j8nouaz.cloudfront.net...er_saloon5.jpg
Quote:
Few persons have suffered more severely than I have from sea sickness, and on a return voyage from Calais to Dover in the year 1868, the illness commencing at sea continued with great severity during my journey by rail to London, and for twelve hours after my arrival there. My doctor saw with apprehension the state I was in. He remained with me throughout the whole night, and eventually found it necessary to administer small doses of prussic acid, which gradually produced the desired effect, and I slowly recovered from this severe attack. My attention thus became forcibly directed to the causes of this painful malady, which I, in common with most other persons, attributed to the diaphragm being subjected to the sudden motions of the ship. Hence, as a natural sequence, its cure appeared only to require that some mechanical means should be devised whereby that part of the ship occupied by passengers should be so far isolated as to prevent it from partaking of the general rolling and pitching motions. In this way I entered, almost without knowing it, into an investigation of the subject; and gradually, as my ideas were developed, I determined to make a model vessel, small enough to be placed on a table, and to which the usual pitching motion of a ship was imparted by clockwork.
On this model was arranged a suspended cabin, supported on separate axes, placed at right angles to each other. I obtained a patent in December, 1869, for this invention, which is represented in two sectional engravings, Figs. 81 and 82, on Plate XXXVII.
A system like the Bessemer just like anything else depends on having the bulk of the mass below the pivot so the center of gravity is low.
Note in his first design there was a ballast suspended below the ballroom pod. in the last photo it appears that the pivot is much higher up with heavy beams serving as the main structure and ballast for the pod. hydraulic cylinders were most likely incorporated to serve as dampeners for those times when the patrons might all move from side to side suddenly.
Variations of the patents have been incorporated into the design of many skyscrapers to serve as earthquake dampeners even though some have been located in upper floors or near the roof as a completely free floating mass the resting mass absorbs much of the kinetic energy smoothing out the violent shaking
must be for earth quake prone yards......sorry I just couldn't rezist it.
I'm struck with a common reaction to Victorian Era patents, with year 1868, era now well underway. Regardless mechanical aspects, physical size, even feasibility; look at detail whose only function is to please the eye.
Key to this, with 1841 British colonization of Hong Kong, influenced addition of high detail to all manner of product, typified by Oriental design. This doesn't copy the figures as much as the concept, but point was to decorate in so much detail you figuratively never saw the same thing twice. It carried over into everything imaginable; a men's razor, cornice brackets of a roof overhang, hand tools, women's dress, drafting tables, rail dining cars, locomotives, you name it.
They may not realize it, also the clear foundation for current 'steam-punk' movement. Where a rusty iron-legged table all of a sudden goes for $600...Can't imagine clamor if this ship was built and now it's parts were available!
https://en.wikipedia.org/wiki/Victorian_decorative_arts
https://en.wikipedia.org/wiki/Victorian_era
The drawings are pretty spectacular in the fashion of the day and personally enjoy the detail and appreciate the hand work of them. My question of the design is how do they compensate for bow to stern in big seas? Waves of magnitude can be pretty shear and if the Capt. doesn't get it oriented right...oops, regardless of port and starboard compensation (which look to be about 15° in either directions).
PJ
Yes, a strong pitching motion could severely damage the suports of the passenger bearing cage and, if they broke, the whole ship would be in danger. Gimbal lock can be a terrible thing.
I think a better, and far simpler and cheaper, solution would be to suspend Mr. Bessemer in a bosun's chair hanging from a hook in the ceiling in a windowless cabin.
Another good example of a boat device that never made it past the model phase is Abraham Lincoln's patented invention: Buoying vessels over shoals.
At least Lincoln and Jefferson designed some practical devices. Name a 20-21st century President who has.
Some people like Bessemer with a 100+ patents are bound to have a few that don't cut the mustard, but his steel processing changed the world in profound ways.
"In 1898, Scientific American published an article called Bessemer Steel and its Effect on the World explaining the significant economic effects of the increased supply in cheap steel. They noted that the expansion of railroads into previously sparsely inhabited regions of the country had led to settlement in those regions, and had made the trade of certain goods profitable, which had previously been too costly to transport."
A container ship flexing from the inside. 2:39 video:
https://www.youtube.com/watch?v=rHlEXn37dVg
This is the MOL Excellence: 9251377_MOL EXCELLENCE
Man that is freaky to watch . but these huge ships have to have flex or they would break apart
When it stops flexing like that is when you have to worry!
Like P.M's they are all too busy blowing off hot air & saying they understand folk & economics. Trade & Jobs? I see where RECORD (UK) are starting to rebuild their home industry. Sorry , I'm on a side-track again.
I am beginning to think we can explore this nautical motion compensating theme forever. Here we have a rotating interior in a racing sailboat.
<video controls autoplay loop>
<source src="https://diqn32j8nouaz.cloudfront.net/rotating_racing_sailboat_interior.mp4" type="video/mp4">
Your browser does not support the video tag.
</video>
Not sure I understand the reasoning for having a rotating computer console and coffee pot in the lower cabin of said boat, it doesn't appear to be compensating for anything other than access to other areas in the cabin. Maybe seeing the concept from a different vantage point or seeing it in use while the vessel is underway might help.
Per my recently-acquired expertise (5 minutes ago), I can tell you that what's not visible here is that batteries and hydraulics are concealed under that console, so that these heavy items can be moved to windward as desired. Interesting, but probably largely gimmicky; this is for the cruiser who wants to go fast.
More:
Interrior arrangement - JPDICK yachts - JP54
https://www.cruisingworld.com/sailbo...boat-blog-jp54
A friend of mine up in Minnesota bought a 63 ft sailing yacht a few years back I don't know how much it set him back but I do know he said it cost more than 3 of his soybean combines. I don't think it was new but the way he described it, it was posh to the max. One of those things like some top end sport cars you have to be invited to purchase one. He said he and his wife had to spend months in Sweden attending a factory sponsored training course then make 3 5000 mile yachting ventures before they would even sell it to him. I've crewed on a few small regattas and I know he had years of sailing experience prior to wanting the thing so I can't imagine what all was in his yacht.
Gimmicky? Probably but who's to say
Money speaks all languages! How the other half live? Every time a v8 4by4 goes by, my other half exclaims "there goes a block of land" so every time we see a top end sports car (lotus, lambo, ferrari & the like) i exclaim "there goes a house". There's some big bucks just floating in marinas & hardly ever used but that's the owners privilege & most of them have earned it, so it would seem.
Never had any problem with the Have mores. Most that I have known were down to earth folks. It was the want-a-be's I encountered who thought they were above everyone else.
This Racing Yacht doesn't make any sense to me. Don't stand by the sink or kettle when it is moving or it will knock you off your feet.
When you are taking into the wind and the boat is in a 38° list you figure out that the only reason you were asked to help crew was because of your ability to hang on and act like a side car rider in a motorcycle race.
Of course Frank. I totally agree; I guess I didn't express that correctly. I know quite a few who have earned their place at the top ( and I have seen & found them very generous to loyal staff & family) & I know many others who live on credit-yuppies we call them. A chap to example was earning 100 + grand a year (in late 70's) & was leasing a Porsche, about his annual salary value, & had to borrow the full 100 odd grand to buy his family a reasonable home. In the meantime the most of us were earning $12 p.h. (in similar admin) and working more than one job to try to get ahead. "You earn it, you spend it" was an old adage. My dad used to reinforce "take care of the pounds & the pennies will look after themselves"-still said it after decimal currency conversion in 1966. Others say the opposite "take care of the pennies and..........". "Penny wise & pound foolish" was another of my father's favourites but then he lived through the two world wars & the great depression etc.
Cheers
When there is no wind you are invited to plot the course in the engine bay, breathing in the diesel fumes. I just KNEW they wanted me along for some reason other than my magnetic personality! LOL
That's funny have we met? Did you ever sail from Galveston to Veracruz or an open water sail from St Petersburg Fl. to Veracruz? I'm glad I wasn't on the one in 1988 when 33 boats went missing 50 MPH winds 20 ft + seas. All of the gimmicky gadgets in the world cannot protect a yacht from that stuff.Quote:
Originally Posted by ranald
That's not for a racing yacht. It's to heavy with many things to break down and change the balance of the boat. That's lux for nothing. Gimbel mounts work better and require no power or other systems to operate.
I wonder if it's a response to the "catamarans are faster than monohulls" argument.
There are many different classes of yachts used in racing Not always designed for the fastest point a to point b race. There are regattas in which only the very high end lux yachts enter, aimed at the billionaire boys/ girls clubs. after all what is the purpose of owning a 200 million dollar yacht if the only thing you can do with it is to sail leisurely from port to port
Wouldn't having you plotting courses be counterproductive? What with the magnetic personality and all?Quote:
Originally Posted by ranald
Sure, we're heading north, if I stand over there...
Hi Frank, mother nature can be so unpredictable. I remember a father & son trawling the west coast of Tasmania :trawlers less than 30 miles apart & the father got a call regarding a freak storm, which he could not see on the horizon. All the gadgetry on the sons vessel was totally destroyed from swamping etc, but did not sink. Lucky he did the mayday call to dad and all crew were saved & lucky to be alive. I believe the Great Lakes are wonderful places to lose a ship or plane (bit like bermuda triangle). We seem to know less about what is under the sea than in outer space.
Like Carolina, I've only been to Galveston in my mind.
Hope you don't have a seat on the couch along the sides, you'd lose your legs!!
Ralph
Circular Stewart platform. I like how a clock is in the background of this GIF.
<video controls autoplay loop>
<source src="https://diqn32j8nouaz.cloudfront.net/circular_base_stewart_platform.mp4" type="video/mp4">
Your browser does not support the video tag.
</video>
Yep the clock is running a little fast due to the accelerated gif speed LOL
That too seems like a lot of stuff to fail in a boat. The last thing anyone wants is a system in a boat that fails and throws of the center of gravity and weight distribution. It could lead to a capsize or knockdown if weather and sea conditions aren't good.
Loose crtl, you are absolutely correct even the simplest form of ballast weight transfer can go wrong at the most inopportune time. the transfer of fuel or water from side to side as ballast is about the simplest there is in larger vessels. Smaller pleasure or racing yachts the crew becomes the ballast. Try forcing yourself to hang over the rails in 20 ft seas on a 40 ft yacht while the captain desperately ties to maintain head way He can't even drop the mainsail because the the throat halyard and gaff are fouled If he could somehow manage to drop it to half mast then the lower portion could be lashed and the remaining would be about the size of a storm sail about the only thing you can hope for is that the peak halyard holds because once it goes the gaff will drop on 1 end and you loose all control.
All of the human ballast is fighting to hang on to scared to be sick. About this time the top sail shears away then suddenly the halyards are free and you manage to lower the main sail to quarter mast get everything lashed now it is just a matter of being able to hold steerage into the waves everything is peachy.
As human ballast you swear never to crew on one of these death traps again.
Years ago, one of the model airplane magazines had a project similar to this that had servos that would tilt a glass plate in a similar fashion. The glass plate had a bullseye with concentric rings painted on it. The object was to place a marble on the bullseye and try to keep it there while operating a hand held transmitter. This was a training device for the early days of model helicopter flying. It looked very difficult.
That covered quite a number of degrees of movement in the first 40 seconds or so and appears that they changed cameras for the additional 5+ minutes and another rash of degrees movement. 6 degrees of freedom (6DOF) is quite a complex system.
Here is a doctoral thesis by two Swedish students...a bit long and necessarily math heavy, but the conclusion and their parameters and proofs are sound...I imagine they got their PhD's. Note: first part is in Swedish but the body of it is English.
Pretty cool Jon!
Passive tanker ship stabilization demonstration from Hoppe Marine. Looks like the strategy here is to remove the baffles?
<video controls autoplay loop>
<source src="https://diqn32j8nouaz.cloudfront.net/tanker_ship_stabilization.mp4" type="video/mp4">
Your browser does not support the video tag.
</video>
More: https://www.hoppe-marine.com/?q=en/node/8