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Subject: "RE: Titanic 3D model project" Previous topic | Next topic
Bill WestSat Apr-15-17 11:35 PM
Member since Feb 02nd 2010
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#54969, "RE: Titanic 3D model project"
In response to In response to 67


          

Hi Steve the new engine is looking good. Some details:

The rib around the cylinders is in the casting. In the assembled engine the sheet metal jacket covers this.

I'm not sure of the cross head guide shape you used the first time. I think it is like this type, duplicated to 2 sides https://commons.wikimedia.org/wiki/File:Slipper_guide_crosshead_(Heat_Engines,_1913).jpg . I think ours has an extra bar at each side of the shoe rather than having the base machined down to leave a depression for it to run in.

The main reverse shaft has a lever at each cylinder. On the end of the lever, tipped at an angle, is a rectangular slot with an adjusting bolt and locknut. This moves the pivot for the link to the eccentric and adjusting it varies the cutoff for each cylinder. The possible uses of this include balancing the power from the cylinders, giving up power for efficiency on an exceptionally long overseas trip and giving up efficiency for power if a faulty cylinder has been blocked out of use. The lever shows in the Britannic plans fig 3.

There are relief valves for the top & bottom of each cylinder. The extra 2 on the HP & IP valves are for the HP-IP and IP-LP receivers.

The inside of the crank pits in the engine foundation won't have lightening holes. The walls will have an oil streak in line with the edges of big end.

It's a good idea to air the controls and devices out, drawing a first guess at them will usually get one's errors (mine) challenged but the net result is to end up with a good statement where we had nothing before. I hope "Atlantic Run" is reading this for the controls on his model.

When you get the drawings done we could probably use a text layer with comments about what the gadgets are. It would be informative to the viewer.

Pretty well everything has simple answers, the most hi tech thing in the whole room is the Aspinall governor which is more smarts than fancy parts. All the vertical rods are a push motion to a lever & shaft and the valves are a push motion rather than rotating the stem. Your "block" is indeed just a plate with 3 shafts/levers pivoting in it.

I've marked up your drawing as follows:



On the IP column your left circle is just a bracket for the oil tube and the right circle is the tube in the extended position.

The throttles are a nut thread in the handle hub that pulls down a foot long coarse Acme thread on the shaft. A pin would stop the wheel from being wound off the bottom. An Acme thread looks like
.

The starting valves aren't really an emergency and they're not for normal starting. They are for the occasional time the engine stops with the HP on dead center. Pulling one of the levers presses a valve in a small box shaped chest and lets auxiliary steam into either the IP or LP cylinder to rotate the engine enough to get the HP off dead center. Which valve you use depends upon which way the HP approached center and which way you now want the engine to now turn. The delivery pipe for the IP passes though the exhaust side of the HP valve chest to get to the IP. The delivery to the LP is into the IP-LP receiver pipe.

The 4 indicator cocks are at the upper end of the cylinders on a tube from the lower end. They look like the one with the handle in this link https://archive.org/stream/steamengineindic00houg#page/52/mode/2up except that the pipes enter vertically while the indicator mount remains upright to one side of the cock. The removable indicator has a piston portion directly above the mount and a chart drum above and to the left of it per https://archive.org/stream/steamengineindic00houg#page/24/mode/2up . The indicators are driven by a cord to a reducing lever from each cross head. The drive lever shows in the "Engineering" drawings from the Linda Hall library.

The other connection to each side of each crosshead is an oil cup feeding it through a telescopic tube. That's the circled item in your last picture. The bent lever below it is a bell crank with an extremely short output arm to the rev counter.

For the rev counter I'll suggest one from http://prestonservices.co.uk/category/parts/instruments/revolution-counters/ . Perhaps this rectangular body http://prestonservices.co.uk/item/hardings-improved-revolution-counter-4/ but maybe with these numbers http://prestonservices.co.uk/item/hardings-improved-revolution-counter-3/ or even better the brass numbers on this gauge board (2/3's of the way down) http://www.subchat.com/readflat.asp?Id=965103&p=1#965247 . Those are Ashcroft brand gauges with the engine maker's name inserted. A very common style in US railroading.

There is also the drain traps but the drawings only show some of the piping. The crank bearing oil feeds likewise only show in photos. I would have to look up whether the oil cooling is down at the bearing or at the supply source.

Bill

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Titanic 3D model project [View all] , SteveFury, Mon Feb-20-17 07:27 PM
  RE: Titanic 3D model project, Bill West, Feb 21st 2017, #1
RE: Titanic 3D model project, SteveFury, Feb 21st 2017, #2
RE: Titanic 3D model project, Bill West, Feb 22nd 2017, #3
RE: Titanic 3D model project, SteveFury, May 31st 2017, #119
RE: Titanic 3D model project, SteveFury, Feb 25th 2017, #4
RE: Titanic 3D model project, Bill West, Feb 25th 2017, #5
RE: Titanic 3D model project, J. Kent Layton, Feb 27th 2017, #6
RE: Titanic 3D model project, SteveFury, Mar 01st 2017, #7
RE: Titanic 3D model project, Bill West, Mar 01st 2017, #8
RE: Titanic 3D model project, SteveFury, Mar 03rd 2017, #9
RE: Titanic 3D model project, Bill West, Mar 03rd 2017, #10
RE: Titanic 3D model project, SteveFury, Mar 09th 2017, #11
RE: Titanic 3D model project, Bill West, Mar 11th 2017, #12
RE: Titanic 3D model project, SteveFury, Mar 12th 2017, #13
RE: Titanic 3D model project, Bill West, Mar 13th 2017, #14
RE: Titanic 3D model project, SteveFury, Mar 16th 2017, #15
RE: Titanic 3D model project, Bill West, Mar 17th 2017, #16
RE: Titanic 3D model project, SteveFury, Mar 19th 2017, #17
RE: Titanic 3D model project, Bill West, Mar 19th 2017, #18
      RE: Titanic 3D model project, Ralph Currell, Mar 23rd 2017, #19
           RE: Titanic 3D model project, Bill West, Mar 23rd 2017, #20
                RE: Titanic 3D model project, Ralph Currell, Mar 24th 2017, #21
                     RE: Titanic 3D model project, Bill West, Mar 24th 2017, #22
                          RE: Titanic 3D model project, Ralph Currell, Mar 24th 2017, #23
RE: Titanic 3D model project, SteveFury, Mar 25th 2017, #24
RE: Titanic 3D model project, Karol_W, Mar 25th 2017, #25
RE: Titanic 3D model project, Bill West, Mar 26th 2017, #26
      RE: Titanic 3D model project, Bill West, Mar 27th 2017, #27
RE: Titanic 3D model project, Scott Andrews, Jun 25th 2017, #127
      RE: More regarding WTD at WTB "K", Scott Andrews, Jun 26th 2017, #128
           RE: More regarding WTD at WTB , SteveFury, Jun 28th 2017, #129
RE: Titanic 3D model project, SteveFury, Mar 27th 2017, #28
RE: Titanic 3D model project, Bill West, Mar 27th 2017, #29
      RE: Titanic 3D model project, SteveFury, Mar 28th 2017, #30
RE: Titanic 3D model project, SteveFury, Mar 30th 2017, #31
RE: Titanic 3D model project, Bill West, Mar 30th 2017, #32
      RE: Titanic 3D model project, SteveFury, Mar 30th 2017, #33
           RE: Titanic 3D model project, Karol_W, Mar 30th 2017, #34
                RE: Titanic 3D model project, SteveFury, Mar 30th 2017, #35
                     RE: Titanic 3D model project, SteveFury, Mar 30th 2017, #36
                          RE: Titanic 3D model project, Bill West, Mar 30th 2017, #37
                               RE: Titanic 3D model project, SteveFury, Mar 30th 2017, #38
RE: Titanic 3D model project, SteveFury, Mar 31st 2017, #39
RE: Titanic 3D model project, Bill West, Apr 02nd 2017, #40
      RE: Titanic 3D model project, tucky, Apr 02nd 2017, #41
RE: Titanic 3D model project, SteveFury, Apr 03rd 2017, #42
RE: Titanic 3D model project, Bill West, Apr 04th 2017, #43
RE: Titanic 3D model project, SteveFury, Apr 04th 2017, #44
RE: Titanic 3D model project, tucky, Apr 04th 2017, #45
      RE: Titanic 3D model project, Bill West, Apr 04th 2017, #46
           RE: Titanic 3D model project, tucky, Apr 04th 2017, #47
                RE: Titanic 3D model project, Bill West, Apr 05th 2017, #48
                     RE: Titanic 3D model project, tucky, Apr 05th 2017, #49
RE: Titanic 3D model project, SteveFury, Apr 08th 2017, #50
RE: Titanic 3D model project, Karol_W, Apr 09th 2017, #51
      RE: Titanic 3D model project, Bill West, Apr 09th 2017, #52
           RE: Titanic 3D model project, SteveFury, Apr 10th 2017, #53
                RE: Titanic 3D model project, Bill West, Apr 10th 2017, #55
RE: Titanic 3D model project, SteveFury, Apr 10th 2017, #54
RE: Titanic 3D model project, Bill West, Apr 11th 2017, #56
      RE: Titanic 3D model project, SteveFury, Apr 11th 2017, #57
      RE: Titanic 3D model project, Ralph Currell, Apr 11th 2017, #58
           RE: Titanic 3D model project, Bill West, Apr 11th 2017, #59
                RE: Titanic 3D model project, Bill West, Apr 11th 2017, #60
                     RE: Titanic 3D model project, Ralph Currell, Apr 11th 2017, #61
                          RE: Titanic 3D model project, Bill West, Apr 11th 2017, #62
                               RE: Titanic 3D model project, Ralph Currell, Apr 13th 2017, #63
                                    RE: Titanic 3D model project, Bill West, Apr 13th 2017, #64
                                         RE: Titanic 3D model project, Ralph Currell, Apr 13th 2017, #65
RE: Titanic 3D model project, SteveFury, Apr 14th 2017, #66
RE: Titanic 3D model project, Karol_W, Apr 15th 2017, #67
      RE: Titanic 3D model project, Bill West, Apr 15th 2017 #68
           RE: Titanic 3D model project, SteveFury, Apr 16th 2017, #69
                RE: Titanic 3D model project, Bill West, Apr 16th 2017, #70
RE: Titanic 3D model project, SteveFury, Apr 18th 2017, #71
RE: Titanic 3D model project, Bill West, Apr 19th 2017, #72
      RE: Titanic 3D model project, SteveFury, Apr 19th 2017, #73
RE: Titanic 3D model project, SteveFury, Apr 23rd 2017, #74
RE: Titanic 3D model project, Bill West, Apr 23rd 2017, #75
      RE: Titanic 3D model project, SteveFury, Apr 23rd 2017, #76
           RE: Titanic 3D model project, Bill West, Apr 24th 2017, #77
RE: Titanic 3D model project, SteveFury, Apr 30th 2017, #78
RE: Titanic 3D model project, Bill West, May 01st 2017, #79
RE: Titanic 3D model project, SteveFury, May 01st 2017, #80
RE: Titanic 3D model project, Bill West, May 02nd 2017, #81
RE: Titanic 3D model project, SteveFury, May 06th 2017, #82
RE: Titanic 3D model project, Bill West, May 09th 2017, #85
RE: Titanic 3D model project, SteveFury, May 07th 2017, #83
RE: Titanic 3D model project, Ralph Currell, May 08th 2017, #84
RE: Titanic 3D model project, Bill West, May 09th 2017, #86
      RE: Titanic 3D model project, SteveFury, May 10th 2017, #87
           RE: Titanic 3D model project, SteveFury, May 10th 2017, #88
                RE: Titanic 3D model project, Bill West, May 10th 2017, #89
                     RE: Titanic 3D model project, Bill West, May 10th 2017, #91
RE: Titanic 3D model project, Scott Andrews, May 10th 2017, #90
RE: Titanic 3D model project, SteveFury, May 11th 2017, #92
      RE: Titanic 3D model project, Bill West, May 11th 2017, #93
           RE: Titanic 3D model project, Bill West, May 12th 2017, #94
                RE: Titanic 3D model project, Bill West, May 12th 2017, #95
RE: Titanic 3D model project, Bill West, Jul 12th 2017, #130
RE: Titanic 3D model project, SteveFury, May 13th 2017, #96
RE: Titanic 3D model project, Bill West, May 14th 2017, #97
RE: Titanic 3D model project, SteveFury, May 15th 2017, #98
RE: Titanic 3D model project, Bill West, May 16th 2017, #99
RE: Titanic 3D model project, Ralph Currell, May 16th 2017, #100
RE: Titanic 3D model project, SteveFury, May 16th 2017, #101
RE: Titanic 3D model project, Bill West, May 16th 2017, #102
RE: Titanic 3D model project, Ralph Currell, May 16th 2017, #103
RE: Titanic 3D model project, SteveFury, May 17th 2017, #104
RE: Titanic 3D model project, Bill West, May 17th 2017, #105
      RE: Titanic 3D model project, Bill West, May 18th 2017, #106
RE: Titanic 3D model project, Bill West, May 18th 2017, #107
RE: Titanic 3D model project, SteveFury, May 19th 2017, #108
      RE: Titanic 3D model project, Bill West, May 20th 2017, #109
           RE: Titanic 3D model project, SteveFury, May 20th 2017, #110
                RE: Titanic 3D model project, Bill West, May 21st 2017, #111
                RE: Titanic 3D model project, Scott Andrews, May 24th 2017, #112
                     RE: Titanic 3D model project, SteveFury, May 24th 2017, #113
                          RE: Titanic 3D model project, William W. Young, May 24th 2017, #114
                          RE: Titanic 3D model project, Scott Andrews, May 28th 2017, #116
                               RE: Titanic 3D model project, Bill West, May 29th 2017, #117
RE: Titanic 3D model project, SteveHall, May 27th 2017, #115
RE: Titanic 3D model project, SteveFury, May 30th 2017, #118
RE: Titanic 3D model project, Ralph Currell, Jun 01st 2017, #120
RE: Titanic 3D model project, SteveFury, Jun 01st 2017, #121
RE: Titanic 3D model project, Bill West, Jun 02nd 2017, #122
RE: Titanic 3D model project, SteveFury, Jun 05th 2017, #123
RE: Titanic 3D model project, SteveFury, Jun 11th 2017, #124
RE: Titanic 3D model project, Bill West, Jun 23rd 2017, #125
RE: Titanic 3D model project, SteveFury, Jun 25th 2017, #126

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Titanic artwork at top of page is owned and copyright of Stuart Williamson and is used with permission.