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Battleship Texas, Starboard Engine Room Mid Grate and Controls, Video 2 of 3 

Tom Scott, The Older One
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This is video two of three that describe the ship's reciprocating engines in detail. Because of its size and complexity, the walk-around has divided the starboard engine room into three levels. In this one, you will be introduced to the mid grate to see the equipment located on it and the engine controls.

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10 сен 2021

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Комментарии : 55   
@dpete8995
@dpete8995 12 дней назад
Tom, thanks for making these videos about this historic battleship. Interesting to learn about and, see the state of the art technology that was in use at the end of the 19th century.
@Morstad64
@Morstad64 2 года назад
Almost looks like it would still start... amazing!
@theFLORIDAman
@theFLORIDAman 2 года назад
The reason they have a rudder gauge in engine control is because during a turn, the boat would require MORE POWER to maintain its velocity / speed. As the rudder angle increased the steam would be applied to keep momentum through the turn and not slow the boat down. Thank you for the tour!
@memadmax69
@memadmax69 2 года назад
Ur not supposed to add more steam during a turn unless its under battle conditions. This adds way more strain to everything. Yes, I worked on a steam plant.
@theFLORIDAman
@theFLORIDAman 2 года назад
@@memadmax69 battle condition or otherwise, that's why they have a rudder gauge in engine control. To get out of dodge if ordered! Lol
@jeebus6263
@jeebus6263 2 года назад
Maybe more on one side and less on the other side?
@The7humpwump
@The7humpwump 2 года назад
In my days as throttleman we would get the bell order usually followed up with a turn order such as “ahead 2/3rds make turns for 10 knots “. We had to keep a bell log for each order which was tricky at times when orders came fast while performing various maneuvers. We also logged the turn counter. Surprised there isn’t a steam trap at the bottom of the the dryer. That condensate should be saved.
@ricksadler797
@ricksadler797 9 месяцев назад
Thank you for the tour ❤. Very informative video. God bless
@seatedliberty
@seatedliberty 2 года назад
Great job covering a complicated subject.
@MrTexasDan
@MrTexasDan 2 года назад
Very interesting tour, Tom. The place looks like it would make quite a racket when running. :-)
@Pamudder
@Pamudder 2 года назад
Reciprocating marine steam engines are surprisingly quiet, much quieter than either steam turbines or diesel.
@W5NEH
@W5NEH 2 года назад
Very informative, thank you so much for the time and effort put into making this video!
@Bobfelli
@Bobfelli 2 года назад
The reason for the rudder angle indicator you already showed. The steam steering engine could be operated locally. The STBD Engine Room station was important because that was the duty station for the Engineering Officer of the Watch. The indications for the Port engine were there for his benefit as he was responsible for the operation of both engines during normal steaming. The acceleration/deceleration tables were important as they kept the Throttleman from outstripping what the boilers could do. The men in the fire rooms also had an Engine Order Telegraph Repeater. This was so they could adjust the number and firing rates of the burners on the boilers in anticipation of what the Throttleman was about to do.
@jonc1736
@jonc1736 2 года назад
Thank you Mr. Scott. Also as a fun aside, when I read your comments it's your voice :)
@leechjim8023
@leechjim8023 Год назад
Tommy you,r Seriously Stud.! Just watch your step!
@ntomenicgiorgo3598
@ntomenicgiorgo3598 2 года назад
Your spoiling us Tom. I now need a new video every day !!!
@burroaks7
@burroaks7 2 года назад
very very awesome
@josephfaria6617
@josephfaria6617 2 года назад
The rudder angle indicator was so the throttle man would be able to anticipate a change in rpms. In a turn the outboard engine would speed up and the inboard would slow down, in a max shaft rpm scenario the outboard engine could overspeed and damage the engine.
@davidcrouch5190
@davidcrouch5190 2 года назад
You got video 2 back!
@matthewbeasley7765
@matthewbeasley7765 2 года назад
What you were saying was the drain for the separator is the isolation valve for the gauge glass. There are upper and lower shutoff valves on the gauge, plus a drain under it. The statement about the condenser gets the tubes backwards. Seawater would be inside the tubes, steam and condensate outside.
@diddlebug7241
@diddlebug7241 2 года назад
Enjoyed the informative video and I hope that the ship goes to drydock very soon. I know it's past due for drydock.
@juliemaloney6585
@juliemaloney6585 2 года назад
The rudder angle is in case the main steering from the bridge or if the bridge gets knocked out it can be steered from engine room
@tomscotttheolderone364
@tomscotttheolderone364 2 года назад
There are no steering controls in the engine rooms. Steering can be done at the steam steering engine, but that is 50' away from this indicator and has its own rudder angle indicator. Otherwise, there are 3 other steering positions that would serve better; the armored conning tower, central station and aft steering. The armored conning tower is close enough to the nav bridge that if it received a fatal hit, the nav bridge would likely be destroyed also. However, that still leaves central station and aft steering that are in safe locations, well away from the nav bridge and deep in the ship.
@lwilton
@lwilton 2 года назад
I wonder if they ever "hooked up" those engines. When you are driving a steam locomotive, once you get it going, you move the reverser handle toward the center position, which reduces the valve stroke and thus the amount of steam consumed. Engineers learned how much they could hook up an engine in given conditions for best fuel and water efficiency. Also, I was wondering if those black hand rails were original, or were added by Parks & Rec when they started giving engine room tours.
@Pamudder
@Pamudder 2 года назад
I obviously don't know about the TEXAS in particular, but in running marine engines generally it was common practice to "link in" or adjust the Stephenson links to shorten the steam cut-off of the cylinders when running at less than maximum speed. This resulted in greater efficiency than partly closing the main throttle valve-- steam expanding in a partly closed main throttle valve is completely wasted.
@John73John
@John73John 2 года назад
@@Pamudder I was wondering this about compound engines. With locomotives (single expansion) it's fairly straightforward. But it seems to my mind that if you shorten the steam cutoff on the intermediate and low pressure cylinders, then you're also adding back pressure to the previous cylinder. In other words, since the IP cylinder's inlet is the HP cylinder's exhaust, closing that valve earlier would prevent the HP cylinder from fully exhausting and rob it of some of its power, wouldn't it?
@tomscotttheolderone364
@tomscotttheolderone364 2 года назад
Yes, they could and did adjust cutoff, by using both the reversing shaft and individual valve adjustment using the small hand wheels at the end of suspension link levers on the reversing shaft. While I am sure a good engine room chief could get it pretty close by sound and feel, they also used an indicator that could be hooked to each stage that precisely charted pressure and timing. Go to page 212 in my bible, the 1914 edition of the Naval Academy textbook, "Naval Reciprocating Engines and Steam Auxiliary Machinery". "www.google.com/books/edition/Naval_Reciprocating_Engines_and_Auxiliar/P3IKAQAAIAAJ?hl=en&gbpv=1&dq=naval+reciprocating+engines+and+auxiliaries&printsec=frontcover
@skovner
@skovner 2 года назад
@@tomscotttheolderone364 THANKS! downloading the pdf now. I read the Mass. Maritime Academy's manual back when they had a steamship.
@Pamudder
@Pamudder 2 года назад
@@John73John Very good question, but because you are also reducing the cutoff of the high pressure cylinder, I don't believe it's a problem big enough to offset the advantage of reducing engine speed by adjusting cutoff rather than partially closing the throttle valve. For an answer that is more than an educated guess, I would refer you to Tom Scott's excellent reply on this same thread and the reference work he cites.
@thevikingwolfpack836
@thevikingwolfpack836 2 года назад
Interesting how clean some places of the ship is an how dirty others are
@ollisTubes
@ollisTubes 2 года назад
Hi Tom, Thanks for this very interesting tour - I remember that you said in one video that the rudder is frozen. How about the engine ? Can it still be turned, or is it frozen as well ?
@tomscotttheolderone364
@tomscotttheolderone364 2 года назад
The engines haven't been turned in about 75 years. It's reasonable to assume that piston rings and bearings are pretty frozen and it would require major work in a shipyard to free things up enough to make things move.
@ollisTubes
@ollisTubes 2 года назад
@@tomscotttheolderone364 Thank you.
@skovner
@skovner 2 года назад
I always wondered why condensers were needed, until I found their efficiency was measured in inches of vacuum. By condensing the steam, the output of the low pressure cylinders was into a lower pressure than it would have been, so, since the efficiency depends on pressure difference, more power was extracted. Later, I found that it also was needed to inject feedwater back into the boilers.
@tomscotttheolderone364
@tomscotttheolderone364 2 года назад
It's primary purpose was to condense low pressure wet steam back into water. It is the only way that you can have a closed loop system. Sending feed water back to the boiler rooms was the job of the feed water pumps that sent it back under 400 psi pressure on Texas. The fact that it pulled a vacuum on the engine's low pressure cylinders was a happy plus.
@skovner
@skovner 2 года назад
@@tomscotttheolderone364 Not just a happy plus, but why a Carnot cycle efficiency increases with a lower temperature at the cold end. I learned the theory in Thermodynamics class, but never understood how it worked until I read books on old ships where they gave the specs for condensers in inches of vacuum.
@tomscotttheolderone364
@tomscotttheolderone364 2 года назад
@@skovner I know, it was a figure of speech.
@timothyreed8417
@timothyreed8417 2 года назад
What was the staffing required on each level? Ratings?
@tomscotttheolderone364
@tomscotttheolderone364 2 года назад
Unfortunately, I have not seen any manning lists for the engine rooms. Anything I tell you would be a guess, which I don't like to do.
@dictatorputski5053
@dictatorputski5053 2 года назад
I think my favourite part of this was the revolutions counter, is that still the total number since the engine was installed? No matter the answer it's still extremely cool to think about how that is a solid representation of how this engine has had a full and active life.
@tomscotttheolderone364
@tomscotttheolderone364 2 года назад
The counter was undoubtedly used like we would use a trip odometer in our cars. What is seen here is only a minute fraction of the engine's total revs over its life. Based upon a very loose calculation, it is likely that the value shown on the counter represents less than a couple of hundred hours of operation, using a cruising speed of 8 knots at 48 rpm. Regardless, your point is well taken that the engines did have full and active lives!
@skovner
@skovner 2 года назад
The rudder angle might be useful of the two engines were not producing the same output, to indicate that there was a difference (the rudder angle was not 0 to steam straight) or to indicate the engines were to help in maneuvering.
@tomscotttheolderone364
@tomscotttheolderone364 2 года назад
Since the engines are attached to identical shaped propellers, they will produce exactly the same amount of thrust if they are turning at the same speed. Any difference in speed between the two engines can be accurately determined by watching the tachometers at the control stand. If those failed, you could then calculate rpm by watching the mechanical revolution counters on the engines and use a stop watch to know number of revolutions in one minute.
@HPD1171
@HPD1171 Год назад
@@tomscotttheolderone364 my first thought for the rudder angle indicator was that maybee you would want to increase RPM to engine on the outside of the turn to assist in the maneuver if necessary. for example if you saw it indicating a rudder angle of 30 degrees to port then it would make sense to increase the engine RPM on the starboard engine relative to the port as that propeller would be traveling further since its on the outside of the turn just like what the differential does in your car when taking a corner so that both wheels get equal power even though they travel at different speeds. i would imagine similar physics would apply here
@pvtimberfaller
@pvtimberfaller 2 года назад
Incorrect on reversing, you would change admission/exhaust From 0-180, the eccentrics are 90 degrees off from the crank, reversing is 180.
@Ztex
@Ztex Год назад
How many men worked in this space?
@gowdsake7103
@gowdsake7103 2 года назад
I am guessing they used evaporators to generate top up water for the engines
@tomscotttheolderone364
@tomscotttheolderone364 2 года назад
Yes, they used two triple effect evaporators to produce make up water. There is a video in this channel that shows them.
@gowdsake7103
@gowdsake7103 2 года назад
@@tomscotttheolderone364 Cool I will look that up TY
@philipblick8887
@philipblick8887 Год назад
It would be good if you could hold your camera steady.
@rxwhat33
@rxwhat33 2 года назад
This design reminds me of the "new" variable compression engines that nissan has out now, interesting.
@QurikyBark32919
@QurikyBark32919 2 года назад
Would this section of the ship be below the waterline?
@tomscotttheolderone364
@tomscotttheolderone364 2 года назад
Yes. The engine room overhead is the third deck. The design waterline is about 2 feet below that.
@greghanson5696
@greghanson5696 2 года назад
The clock is also powered by steam.
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