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Author Topic: side lever engine cira 1840s  (Read 12218 times)

daves

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Re: side lever engine cira 1840s
« Reply #100 on: February 03, 2019, 12:01:15 AM »


thank you Derek never in 100 years would i have come up with the term "shearlegs"


hum?? interesting indeed shearlegs is the answer to lifting heavy things, now to ponder moving heavy things, the shearlegs are stationary so the parts have to be moved to the shearlegs. Unless the shearlegs rotated then it could be constructed next to the hull, rotate and pick up the frames then rotate them over the hull timbers and set them down.


it does make engineering logic to lay the keel set the floor timbers in place and construct the engine, then built the hull around the engine rather than build the hull first and lift up and lower the engine into the hull.  But somehow the shearleg crane has to swing and pick the parts up off the ground and place them on the hull floors.
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derekwarner

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Re: side lever engine cira 1840s
« Reply #101 on: February 03, 2019, 04:12:52 AM »

Dave........the following image & text [Belfast Ireland] answers some of your questions


I had the advantage & privilege in part of my working life, as being employed by our Australian Department of Defence Navy, located at our Fleet Base, Garden Island Sydney


In the history of GI, we see she still had a large 'pair of shear legs' as late as 1927.....


Derek ....[it was said that Above Weapons Foreman don't actually work  {-) ] :P
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Derek Warner

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daves

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Re: side lever engine cira 1840s
« Reply #102 on: February 05, 2019, 03:29:33 PM »


check out this crane in the foundry where they are casting the cylinder pretty nice


I am still searching for better drawings of how shipyard cranes shearlegs and derricks work they had to swing side to side to pick stuff up off the ground and swing it in place.



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daves

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Re: side lever engine cira 1840s
« Reply #103 on: February 07, 2019, 02:54:59 PM »


I would think a crane of some sort had to swing to the side pick up a part and swing it over the hull. This system would need a slewing platform of some sort.


any ideas?
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derekwarner

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Re: side lever engine cira 1840s
« Reply #104 on: February 07, 2019, 10:40:43 PM »


Dave......the motions of Sheer Legs were limited to lifting, luffing & lowering.....due to the design limitations [of stability] larger variations were fixed and did not slew


Reading of references has noted that to attain a placement of a load, it could be necessary to move the vessel in a longitudinal plane [fwd to aft] under the Sheer Leg centre or axis to gain a tru[ish] vertical lift or lowering


https://www.youtube.com/watch?v=pDUvN2C8Wa4

The huge Sheer Leg set at Garden Island were not for ship construction, but ship maintenance...so it was  a relatively simple method of moving the ship along the wharf to gain that tru[ish] vertical lift

[and all this time I had been incorrectly thinking >>:-( of two items in [shear]
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daves

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Re: side lever engine cira 1840s
« Reply #105 on: February 08, 2019, 12:56:42 AM »


I found these



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daves

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Re: side lever engine cira 1840s
« Reply #106 on: February 08, 2019, 02:41:52 PM »



I actually found this it is from the very company that built the engine being modeled here


it shows 3 different cranes in use

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daves

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Re: side lever engine cira 1840s
« Reply #107 on: February 08, 2019, 02:53:41 PM »


after watching the shear leg video I can see how it would work lifting heavy engine parts and placing them in the hull.


here is another type crane that seemed to be everywhere
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daves

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Re: side lever engine cira 1840s
« Reply #108 on: February 22, 2019, 03:56:01 PM »


a progress report on the modeling of the engine


here is the condenser and cooling tower modeled so lets take a walk around it

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daves

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Re: side lever engine cira 1840s
« Reply #109 on: February 22, 2019, 03:57:36 PM »


getting up close



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daves

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Re: side lever engine cira 1840s
« Reply #110 on: February 22, 2019, 04:01:03 PM »


there is a hole that runs through it from side to side  and a few openings I guess for steam to enter the condenser and cooling water inlet and outlet and an opening for an air pump with a couple extra at this time unknown openings like in the cooling tower.



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daves

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Re: side lever engine cira 1840s
« Reply #111 on: February 22, 2019, 04:02:03 PM »


the cooling tower is bolted to the top of the condenser



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daves

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Re: side lever engine cira 1840s
« Reply #112 on: February 22, 2019, 04:59:30 PM »


ok so lets fit the condenser into the engine


it sets right over the opening in the bedplate well



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daves

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Re: side lever engine cira 1840s
« Reply #113 on: February 22, 2019, 05:01:18 PM »


and some more views



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daves

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Re: side lever engine cira 1840s
« Reply #114 on: February 22, 2019, 05:03:23 PM »

that hole is a tunnel for the lever shaft to run from pillow block to pillow block
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daves

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Re: side lever engine cira 1840s
« Reply #115 on: February 22, 2019, 05:05:24 PM »


and finally an overhead view which a light went off and I think the cooling tower is in the wrong place it should be turned 90 drgrees and set at the back of the condenser. Humm I will post a correction later



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grendel

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Re: side lever engine cira 1840s
« Reply #116 on: February 22, 2019, 07:46:45 PM »

nice
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KNO3

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Re: side lever engine cira 1840s
« Reply #117 on: February 27, 2019, 09:46:29 PM »

Beautiful!
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daves

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Re: side lever engine cira 1840s
« Reply #118 on: March 11, 2019, 02:07:19 PM »


a little more progress on the engine



the air pump has been modeled  I do change the rendering just for the heck of it so here is the air pump which bolts to the side of the condenser.
there has to be a hole in the top for the shaft will do that later

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daves

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Re: side lever engine cira 1840s
« Reply #119 on: March 11, 2019, 02:11:59 PM »


so now the air pump gets bolted into the engine



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daves

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Re: side lever engine cira 1840s
« Reply #120 on: May 26, 2019, 02:57:23 PM »


https://waterandsteam.org.uk/explore-the-museum/


is there anyone on the forum close to the above museum?
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daves

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Re: side lever engine cira 1840s
« Reply #121 on: May 26, 2019, 02:59:00 PM »


an up date on the modeling project of the gothic engine

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derekwarner

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Re: side lever engine cira 1840s
« Reply #122 on: May 26, 2019, 10:36:20 PM »

Dave ...your original Drawing displayed symmetric or square plummer block feet....


When modeled in blue in Feb 19 they were square
When modeled in green in March 19, one side is tapered down?


The eight nut heads shown on C-C F in the original plan are only partially seen , so could well be off axis & under the reduced width of  the Web?.....however would require flat surfaces on either side for squareness and securing


Derek
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Derek Warner

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southsteyne2

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Re: side lever engine cira 1840s
« Reply #123 on: May 26, 2019, 11:30:24 PM »

I think that the bearing caps are dished on top to  hold oil.
CheersJohn
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daves

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Re: side lever engine cira 1840s
« Reply #124 on: May 27, 2019, 02:03:15 PM »


actually those surfaces do not tapper down, sometimes when I render an object the light source makes thing look different than what they really are.



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