The Pumps That Move 37million Gallons of Water Out of the Drydock
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- Опубліковано 4 жов 2024
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In this episode we're talking about the pump house at the drydock.
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The views and opinions expressed in this video are those of the content creator only and may not reflect the views and opinions of the Battleship New Jersey Museum & Memorial, the Home Port Alliance for the USS New Jersey, Inc., its staff, crew, or others. The research presented herein represents the most up-to-date scholarship available to us at the time of filming, but our understanding of the past is constantly evolving. This video is made for entertainment purposes only.
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A nice memory for me. A now deceased pipe fitter and I installed piping in that drydock. I believe to remove the last little bit of water from the bottom. It was 6" or 8" pipe and I was the welder. That was about 1987. Never got a chance to see those big pumps but did spend a fair amount of time in some of the yards other dark spaces of which there are many. RIP Eddy!
How about a tour of those other dark places?
Was Eddy a good guy to work with?
Each pump can de-water 105,000 gallons per minute???? My home swimming pool is 35,000 gallons. I can't imagine seeing my pool drained in 20 seconds. That is crazy.
If you were to hook the five F-1 engines of a Saturn V rocket to your pool, they'd drain it in about 10 seconds.
@@KingdaToro As I recall, those F-1 turbo pumps required around 50,000 horsepower to feed the fuel. This was 1950s technology.
How much is all that in liquid curators?
@2505JAD one liquid curator = 11 cubic feet of volume (approx) = 83 gallons.
There's probably a documentary on liquefaction of personnel of submersibles who just happened to have gone past crush depth on Magellan (today's video sponsor)...
SZIMANSKI! YOU STAY ON THE BLACK DRAGON! BB63 TEST DEPTH IS ZERO!
@@KingdaToro Wouldn't the five F-1 engines of the Saturn V have just boiled off his whole pool in about 5 seconds?
Looking at the sheer scale of the pumps involved in the drydock makes you realise that no matter how big a thing you're making (an Iowa class battleship, for example), you also have to have the tools to build it, which are going to be bigger still.
I bet that if the motors had been built to today, they would have been smaller, due to improvements.
@@alexandermarvin9536 and would have had to been replaced yearly due to planned obsolescence
Quite amazing the original pumps are still working. Thanks for another episode Ryan.
Quite amazing the work that has gone into maintaining it for all these years.
It's just a hunk of metal, but three solid career lengths have been spent lubing it, rewinding it, etc.
@@phillyphakename1255 Oh let him have his comment without needless correction or caveating
@@POVwithRC I meant it as an addition. Probably should have put a "too" at the end of the first paragraph.
When I see these spaces, I feel the work that went into making them, to maintaining them, and in turn, all the work they do. The century of ships they raised and lowered, maybe it's just a steam tunnel and think of all the university students and professors it kept warm.
There's people at the heart of the story. People who built it, who maintained it, who used it, and who ultimately benefit from it. That pump has served us and our national security for 100 years, more than a human lifetime, more than 3 peoples working lives, 5 military careers. It's done a lot.
"Built to last"
@@phillyphakename1255what makes you think it was rewound
Crazy all of that growth down in the catacombs of the dry dock and that the place is still operational after all these years!
This topic of moving water with pumps makes this old firefighter very happy.
Yay! Pumps! Thanks Ryan for accommodating us. One last thing I’d love to learn about is the big crane. I imagine it has an interesting history.
Yes I’d love to learn more about the cranes too, and how they built the dry dock originally. I kinda wonder how hard it would be to build a dry dock the same size today. Hopefully they do a video on the crane soon!!!
Ryan should have just built a new drydock 😅
The quality of the pumps speak volumes of the way things were built back then.
technically that set up was meant to be abandoned as that was the mindset at the time where as now days we don't just abandon sites so they are designed to be upgraded so chances are those motors have been rebuilt multiple times
I would say that motor was rebuilt more than once
Akshually. @@KILLKING110
Rate of profit was higher back then. Everything is crappy now because that is how business responds to declining rate of profit.
Industrial mechanic here who mainly works on pumps at my current job, these things haven’t changed much since the 1950s, they’re more efficient now but reliability is gonna be there for a 1200 hp motor no matter when it’s built.
Not ball valves, but gate valves, where the handwheel moves a gate off a seat, and thus controls flow. As they do tend to always leak a little, but also will always close down, there will be small sump pumps there as well to handle whatever leaks, along with whatever also leaks past the coffer dam seals, along with any discharge water from the ship, and rain as well.
I worked in a shipyard in St Catharines, Ontario. The yard was built above Lock 1 of the Welland Canal. The dry dock was drained by gravity in the lower canal below Lock 1. From what I understand this dry dock is unique as it the only totally gravity fill / drain dry dock, from what I've been told.
There is one on the English canal network at Stone, Staffordshire. It too is located next to one of the locks and drains by gravity to the lower level. Since narrowboats, and the dock, are so small filling is just yanking out a couple of wooden planks at the entrance.
47,000 tons displacement works out to about 11.3 million gallons. So, about 30% of the 37 million gallon capacity of the dry dock. With 30% of the dry dock water displaced by the volume of the ship, the 6 hour pump procedure becomes closer to 4.
You're right and I think Ryan said that near the end of the video.
@@justaskin8523 less time to watch documentaries then
6:43
Great job of concrete work done decades ago. The planning, construction and maintenance is phenomenal! Back when doing a job was worth doing it right, the first time. What no leaks at the lowest level? Finally seeing the pumps was worth the wait,thank you.
Many years ago I took a “hardhat tour“ of Hoover dam - a lot of the equipment there looks very similar to what is at this drydock - seriously overbuilt equipment for managing the flow of water that lasts a very long time
Most of it was Allis-Chalmers
The first Boulder Dam generator went on line in the late 1930s. The last generator was installed in 1961. The input shaft power is about 3 Gigawatts. The electrical output is about 2 Gigawatts. It was impossible to ship the huge parts to make the penstock so Babcock & Wilcox built a plant on site to bend and weld the plate. The plant included a massive X-ray machine several stories tall to inspect welds. The largest penstock pipe was wide enough to drive a diesel locomotive through it. The scale of Hoover Dam is really mind blowing.
Another interesting fact is that before interconnecting with Boulder Dam, Los Angeles’ electric utility operated at 50 Hz. The tie-in required the utility to switch to 60 Hz and offer a multi-year trade-in program for customers to exchange clocks and appliances which could not operate correctly on the 60 Hz power supplied by the dam.
When I came for my tour and parked, the first thing I noticed was a GIANT pump impeller on the drydock fence line closest to the street and I knew exactly what it was for! You guys are so lucky to be able to experience this stuff. Keep up the good work!
General Electric, supplied a lot of electrical equipment for the navy, in the past. I worked with a lot of tech reps from GE, in the 70's. Generators mostly on Fast attack subs.
Now all made in China and last a year
Fantastic to see those old motors still in service. I guess since they only get used a handful of times a year they have not worn out.
They are induction motors, so there are no brushes or segmented commutators to wear out. I suppose the bearings might wear out, but I think the pump, full of corrosive water, probably requires a lot more maintenance. I have a few induction motors and they run quietly forever. I have a few from the 50's and I have just put a drop of oil on the bearings every once in a while.
I am surprised I did not see Mike Rowe down in the pump room getting Dirty.....Bravo Ryan.....
Ryan may not like him......mike likes all those dirty crawl spaces............
Ha ha! Dirty jobs! The other question is why in the heck didn’t modern marvels ever feature dry dock three at the former Philadelphia Navy yard in any of its episodes. Well, thank goodness for Mr. curator.
That would be an awesome crossover... Mike, come crawl around the battleship with ryan!
@@IllustriousCrocoduck Oh I would watch that! Mike Rowe has a long long history in television, from all the way back when he worked for/with Joan Rivers on QVC, I think it was.
Not a fan of
5:42
man, the timelapse of the drydock being emptied is really fantastic.....super cool combo of a ship coming out of the water and watching the skies go by. Really great.
Nice video Ryan and a great memory for me. In 1993, I was an SM1 (Signalman First Class) and reported to USS Constellation (CV-64) as it was finishing a three year yard period in Philly Navy Yard. We were tied up about two piers over from that drydock and the USS Forrestal (CV-59) was in that drydock for overhaul. Word came out (Mar 93) to decommission Forrestal while in the yard instead of finishing the yard period. I came over there to scavenge what I could from the Forrestal Signalmen. They were pretty bummed about the decomm, as they had just recently moved to Pensacola to be the training carrier full time and now that was all over. I also remember taking a late evening stroll down into one of the smaller drydocks which had a Charles Adams class DDG which was being sold to Greece. It was pretty cool wandering all around the ship and under it. There was nobody around and no crew on the DDG. Nice video of the pumps and drydock, very interesting to me!
This video is an excellent and comprehensive overview of how the dry dock operates and how complex and advanced this technology was over a hundred years ago. Very impressive!
I really love the telephoto framing in the narration shots! Puts the huge ship into great perspective. Well done to your camera team!
Thanks for covering this subject . You never know what's under your feet in these old places . The pumps , shafts and valves look pretty familiar . The way these places were built and the robust engineering involved is a tribute to our predecessors and the costs involved have been well and truly justified over the years .In the uk.many of our docks and culverts are older and I'd have loved to see them so it's nice to see what's actually down there .
I collect and restore vintage tools, electric motors being one of the most interesting. I have a G.E 1/2 h.p and a 1/4 h.p Marathon repulsion induction. Both over a hundred years old. Amazing to think that if I wanted to they could go back into service as the work horses they were. Very simple but very elegant. Beautiful bronze journal/sleeve bearings with oil grooves and felt wicks far superior to cheap modern day ball bearings. I keep a wire wheel on them both to spin up every now and then, thinking of replacing the newer motor on my table saw with the General Electric.
If the nameplate data looks off… The pump motors are probably 3-phase Y-connected. The effective voltage is 2200 * sqrt(3) and the effective current is 313 amps. If the motor is about 77% efficient, you get 1250 mHP output. My efficiency assumption seems low, a modern 3-phase large induction motor averages around 92% efficient.
It's not inefficiency, just power factor less than unity. Both old and new motors are probably about 90% efficient with a power factor of 0.8.
Many thanks Ryan for all the information you have provided us during this dry dock period of USS NJ. It has been a real treat going through this journey of her retrofit with so many answers to the many questions we have all wondered about. Great job & many thanks from Canada.🙏🇨🇦👍
We have larger motors driving equipment at the papermill where I work that are a fraction of that size. Of course those motors are far newer and more efficient. Our largest motor is 7500 hp. and runs one of our paper machines. That motor replaced a 6000 hp. steam turbine. All of our primary effluent pumps are rated for a total of 40,000 gpm. with the largest pump driven by a 300 hp. motor and rated at 6000 gpm. Excellent video, love seeing that old equipment. Thanks much!
the pump motor here is only 240 rpm . so at 1200 hp should be about 27,000 ft lbs torque.
@@ronblack7870 Our 6,000 gpm. pump runs at 1370 rpm., not sure what the torque is. Voltage is 480.
@@poowg2657 1150 ft lbs, assuming 1370rpm and 300hp.
@@Muffin_Masher Cool!
@@ronblack7870It probably is a 32 pole motor. So nope.
Great video! I'd love to know more about the pumps. My first job was as a mechanical draftsman at the Ingersoll-Rand Engineered Pump Division in Phillipsburg, NJ. Sadly there is nothing left of that plant today. The pumps you described are similar to some desalinization pumps I worked on for Saudi Arabia. The vertical lift pumps were installed on piers that ran a few 100 yards out in the ocean and installed approx 40 feet under water. The pipe diameter was something like 16 feet in diameter, as was the bronze impeller. I think there where at least 6 or 8 of these, and each one had a 3000 HP GE Electric motor on top of the shaft. It was a rather big job for us at the time and I remember I-R even had to buy a special Vertical Turret Lathe, big enough to machine the impellers.
🎉all the machinist that make this stuff have to be proud of all their parts still being used! One word! BRAVO
Looked to me like the switch gear has been changed out, would have loved to see the original stuff. probably pulled in new wire too.
New switchgear: SF6, enclosed, arc-arrestors
Old switchgear: Wooden stick and Safety Squint (probably)
Thank you Ryan for another great video of what all goes into making the New Jersey's dry dock visit all happen, unless one is in the industry, it makes for some impressive footage that many of us would never ever be able to see.
The fact the pumps and their motors are still operational today...shows how much pride was put into trades in days gone by....I doubt anythng manufactured these days, would stand the test of time to survive to see their 100th birthday.
Have thoroughly enjoyed watching every step of this dry docking marathon, and every video relating to it, it has been impressive to see the amount of work that goes into maintaining this beast of a ship....even being the static display she serves so proudly as today, as do the other IOWA's, but nothing beats the output of video's and information you provide us with, so for that, a huge thank you, and cheers from Sydney Aus 🍻🍻🍻🍻
I worked on pumps you could walk through , they could pump at max about 6340.13 gallons per second, so these arent even that big, but still awesome to see.
I'd been waiting for this one. Quite impressive that the same hardware is in place since the drydock was built. I figured they'd have gone through at least one refresh being it's been over a century. Big tough old equipment!
For sure. I can't imagine the depths to which they had to excavate, and then set up forms for all of that concrete work far below the level of the floor of the drydock.
Those motors for sure have been rewound, as they likely originally used paper insulation, and will have been upgraded to class H insulation simply due to leakage current through the paper. You can see plenty of paint coats applied over the years as well, and the main bearings will have been replaced as well, along with the intermediate bearings on the shafts. Pumps will have had a number of rebuilds, as they do wear, especially when pumping silt laden water, and those grates do allow lots of debris through, so if you pull one apart you will see the rows of weld that have been applied to reface the volutes and also the impellers, to replace worn away metal.
Ah yes, very true. I completely didn't think of in place refreshes. I'm so used to the modern electronics I deal with where if it gets old or stops working we just yank it out, send it for e-waste recycling and put in a new one.
Did we ever get a precise measure of the ship’s displacement throughout this extravaganza?
I’m pleased they’re able to capitalize on this dry dock process. Hopefully it’s enough to last a few decades.
I hope this sponsor was good for you! That's a big boost!
Starting a pump has a big draw of current .
Commercial customers pay extra for that Over the price of the juice consumed .
So running one pump longer is cheaper than starting Three pumps and getting done sooner .
The extra is called a Demand charge .
Basically they are charging you to have a generator standing by to give the Extra current for starting .
For more fun look up Ratcheting Demand Charge !
Extra generator to supply demand when needed, extra copper to get the power to your (pump)house, etc.
Grady on his Practical Engineering channel just did a good explanation of the strain that large motors can place on the grid, because not only do they pull a large amount of power briefly to start up, they also quickly dump that power back into the grid which also incurs costs.
The power company also nails you on “reactive power” from induction motors( KVAR)
@@willl.4570
You can buy capacitors to do power factor correction to correct a leading power factor .
To lower the demand , soft starters , VFD drives are better than traditional Y-Delta , auto transformer, motor starters.
i love those breakers. you have to pump them up then press the button to get them to engage. the sound is or can be unnerving. i have them on my chillers at work.
I worked at the Newport News Shipbuilding and Dry Dock Company for three years and never knew anything about the dry dock operation. This was very interesting! Thank you, Ryan.
In waster and wastewater industry we typically rate pumps in mgd (million gallons per day) those pumps are 151.2 mgd which isnt small at all, but comparison wise, are similar to a good size storm pump for handling heavy rainfall. Also 47,000 tons is 11,271,000 gallons (rounded up). Keep up the cool videos love seeing things like this.
Great! Exactly the questions I had after the last (? Dry dock specs) video. But one question. After seeing the label on the motor, how much has been replaced over 100+ years? Same question for mechanical components. Lots of maintenance, I suspect.
I live about 5 miles from where those motors were manufactured. It's always fun to see stuff made in Schenectady, because there isn't much made here anymore.
Thaaaaaaank you so much for this video. I have asked several times for info on the dry docks pumps and flooding mechanism, and I’m so very thankful for this.
"331 amps... which is probably more amps than your house draws"
APPLES AND ORANGES
power is voltage times amperage
2200 Volts at 331 A is substantially more power than 331 A at 240V
728200 Watts for one pump compared to a house with 200A service 44000 Watts. 16.5 times more power for one pump. They have 3. So almost 50 more power than a house can supply.
@@Aesperius I was just going to say this - my property has a 400 amp 220 V single phase service - it could provide roughly 90,000 Watts
@@Aesperius did you factor in incoming is probably 3 phase not single like residential.
Amps are still amps. The size of the cables they need, for example, is determined by the current, not the power.
@@thomasdalton1508amps determine the thickness of the copper, voltage determines the thickness of the insulation. I have some 100kV wire at work that's like a centimeter thick, but only 18 gauge copper inside because it outputs milliamps.
I've also done 800 amps, and we were just throwing copper at the terminals in hopes of keeping the temp down so as not to melt the insulation.
The US Navy used to own some floating dry Docks like the one in the New Orleans Navy Yard. And in WWII they had them in the Pacific Theatre; Today the Pacific Dry Dock at Alameda, CA runs one of them; I have seen it lift several vessels out of the water; like the USS Pampanito and the ship Balclutha. The pumps are new, but the cement just does not wear out! TM retired ship historian
Tm, do you know who owns that yard now? I went aboard the pampanito when she first came to San Francisco, many years ago. I always wondered if they ever dry docked her!!!
Love this one, the battleship and the Dock as a single exhibit.
Ive seen some big DC motors in coal mines and conveyors, running a copper cable about the diameter of a softball all the way down to the bottom of the mine
That space looks woefully undermaintained
Great video. We were wondering what size motors and pumps were used for this operation. How do they keep the debris from the lake from entering the pumps?
Those are some DAMN sturdy pumps if they're still working after over a hundred years
I have to say this was one of the most interesting episodes. I had no idea a drydock involved so much technology. Do they just leave all this equipment in place when a drydock is out of service -- like at Hunters Point? Or is the equipment removed.
Man, that telephoto A-Shot is beautiful.
Awesome job by you in sharing this amazing information and all the crews that make everything happen in a timely & safe manner. 🇺🇸
Waiting to hear how Ryan pronounces "Schenectady" since he has trouble with Albany.
Should be funny. ;)
After wondered if they just opened up a couple of 3 to 6' diameter pipes to fill the dry dock with water. Wow a.asking they use three 1,250 HP Pumps. Back in the 1970's I use to attend meetings that the Philadelphia electrical Association had. Got friendly with an electrician from the Naval yard. Told me they only used a 100 HP motor to lift the bridge up to allow ships to travel in or out of the yard. Of course it took awhile to perform bridge lift.
sweet everyone's here
Havent work on any quite that size but my shop's worked on a few river pumps that are about half that capacity. Its kinda humbling working on a motor/pump and to realize it could fill the whole building (about 100x50x25ft) floor to ceileing with water in under a minute
Thanks!
I was hoping for something on the dock machinery before the work was finished.
Ryan, I would have loved to learn about the history of the crane. Was it the one that installed the 16 inch gun turrets????? How much can it lift and so on. Thanks for all of the great info that you are providing while still getting your job done.
awesome video but the Magellan TV ads were annoying.
Yes, I agree 100% - but they are a non-profit museum and hopefully these ads help them with their ongoing mission.
Holy crap. Those motors are, each and every one of them, ABSOLUTE UNITS.
Interesting trivia - if that plaque indicates where those motors were actually produced, the facility is still in operation. Some of the equipment in use then MAY still be in use now
Do her rudders still move? And if so is there footage of her rudders moving in the dry dock? Maybe even closing the barn door?
I'd be very interested in more information/video about the battleships pumps.
What is amazing more than anything else is that the drydock was built over 100 years ago & all the original parts - WORK~! American made & they knew how to make it really great back then. PJ
Can we get more navy yard archeology video's? Like the story of that draw bridge or sites of old defunct Naval Yards?
Great episode Ryan. Could you do one on the crane that's dockside...? Would love to see that and know it's history. 👍🏻
Coming soon!
This is your best ad integration so far.
I spent many years in the pump industry; Worthington, Goulds, Ingersoll-Rand and Allis-Chalmers are just a few names which come to mind.
Can you shed some light on the brand(s) of dewatering pumps used in the Phila. Dry Dock?
so running all three pumps would draw over 2 megawatts of power at full tilt, they must have some crazy electrical supply to handle that
That almost matches the Megawatt Charging Standard for trucks and heavy equipment.
Hey Ryan, are the analogies you use about comparing motor horsepower and electricity a Navy thing? You sound exactly like my dad 😂
Would love to see the power room that generates the power
When I served in the Navy the two floating drydocks I was on had 4 29600gpm and 4 19600gpm pumps that were made in 1939
The plumbing show when talking about the "ball" vales for the pump looks more like a _gate_ valve to me. [Edit: a bit later they are referred to as _gate_ valves.] The big "tombstone" shaped part stinking up from the pipe is where the gate would be retracted up into (assuming it is a gate value). And that would make more scene because a ball valve that big would require a *lot* of torque to operate and there is no need to open or close it quickly.
I agree. Ryan misspoke about ball valves, then correctly explained gate valves later.
Came looking for this comment. Thank you!
Amazing! Sadly this may not be around for the next dry docking.
I'm getting Resident Evil 2 vibes from that pump room.
in order to compare this to house hold voltage you would have to convert to Watts. 331 amps @ 2200vac would be 728,000 watts. Your house 100 amp panel at 240vac is 24,000 watts. so about 29 times more power then a fully loaded household panel.
I've worked on some big pumps and bigger motors (6000hp mining hoists probably being the largest single ones). The size and age of that setup and column pumps is impressive. Imagine how it must have been perceived when new, turn the pumps on and you are drawing more power than entire districts of the city of Philly in those days.
Some electric locomotives from the decades around when those motors were installed could draw up to 700 amps. I would have to go look up the voltages, there were many different one in use across the US and Europe. But I do remember seeing a New York Central 'S Motor" built circa 1904-1909 which had 700 amp fuses or breakers on its 3rd rail contact shoe circuit. 🤔 Hmm, wonder what kind of torque rating those pump motors have?
Proof they don't make things like they used to. Amazing those original motors are still in service.
Extremely uneffective, difficult to control, dangerous... but they do exist, do their job and used 10 hours per month, so of course no one wants to replace them.
Brushed motors are a very simple technology. Just keep them lubed, and replaced the brushes now and then, and they'll last forever!
@@BlackEpyon Brushed motors? These are induction motors, not doubly wound synchronous machines. Notice the full load RPM is less than the unloaded RPM
And another uninformed "they dont make things like they used to..." comment 😂
Come on, you all can do better than that.
@@Ganiscol do you think any electric motor made today would last 110+ years in service?
We are still living 😂😂😂❤❤❤
Over 100 years is amazing in a corrosive environment.
Philadelphia is pretty far upriver - it’s not salt water, so not that corrosive.
Whoa! This was an extremely cool video to watch.
Weird 100 year old system when it was not possible to mix 23kv and wet space 5 storeys underwater, so they used long shafts. Now electric motors placed next to pumps, underground, in tunnels and even in ship azipods.
Would love to see the pump curve for these pumps. Probably a big flow change due to the delta in net positive suction head and change in head pressure.
If there was ever a reason for the USA to adapt the metric system it’s this great New Jersey vlog.
Cubic metres of water and tonnes of displacement certainly is easier than gallons/tons of
Europe here.. our standard household voltage for everything, lights, sockets, appliances etc. is 220 or 230 volt on 16 Amp breakers.
Ryan may not be a know-it-all when it comes to electricity in your home, here or abroad.
In the US, what's coming out of our transformers into our homes is actually 240V. We also have a center tap (neutral) on the transformer that comes in, too. The neutral is also grounded at the pole. So each hot wire will then be 120V relative to that center tap and 180° out of phase with each other. 120V is a holdover from the early days when wire insulation couldn't safely withstand more voltage. By the time electric made it to Europe, better insulation was available and you guys settled on 240V. We need 240V, too, for big loads like clothes dryers and ovens. At this point, it would be nearly impossible to fully switch over to 240V. Grid changes are not required. But we would need to change out breaker panels and buy all new appliances at the same time inside our homes. In Japan, they have an even weirder situation. Half the country is on 50Hz and the other 60Hz due to early competing standards. Eventually the two grids were connected by rectifying to high voltage DC and then inverting back to either 50Hz or 60Hz. This became the bottleneck during the Fukushima disaster because no one envisioned so much power being lost on one side of the grid. I believe there are some homes in Europe with 3 phase power. In the US, that's effectively limited to industrial applications.
Britain likes to be a wee bit different. Our outlets are on ring mains, so most of them are on 32amp breakers.
I bet most U.S. houses have larger main breakers though. 200 amp service (@240V) is common in newer homes.
Using my fingers and toes one of those motors draws 9x what the battleship draws in a normal day in terms of watts. Pretty wild a high voltage motor is in use over 100+ years!
Ryan, you didn’t climb down to the beiges of the drydock??
Wow that dry dock is so cool!
It'd be wild to see what the river outlet looked like when they turn one, or maybe even all three, of those pumps on full force. I don't imagine they do that now, but I suspect the Navy had at least one rush job go through there.
Around 2:15 there are bundles of planks floating on each side, up near the caisson, what are those for?
I noticed them on the floor of the dock during the tour, went looking for them in this video and there they were.
Regular reminder that most of the world has ~240 VAC service at their house at least, and many even have 440 VAC three-phase power. I'm still not sure how farms in the US manage without three-phase power, as we used the heck out of it on ours. AC motors love it.
so one of those motors use about 3/4 of a megawatt.
No wonder they only used one motor.
Why not sell the drydock water? At $1 per gallon that would be over $1 million!
There's poo in that water.
Get Belle Delphine to swim it first and the NJ could be funded for life!
It just shows how good that the dry dock was built back then . That's the dry dock is about the same age as battle ship. But at least their people That's kown how to run it and maintain it.
It's probably very inefficient, but it hardly breaks down. Such is the technology of days long past. I sure like to think that GE would still service those if things go troublesome...
AC voltage and current are inversely proportionate. The higher the voltage applied to an induction motor, the lower the current required to produce the necessary horsepower. (Assuming the motor insulation is rated for the higher voltage ) A 2300 volt motor is considered a medium voltage application. The starters appear to be limitamp with air quench arc suppression.
I think it’s interesting that the pump’s nameplate says 331 amps / 2200 volts but even if you converted that amount of electrical power into mechanical power with 100% efficiency it would only deliver 970 hp.
Perhaps that’s the electrical rating under normal operation and the 1250hp is like a maximum limit that requires more current?
Good video Ryan, Libby and crew!