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Top The TRMA Discussion Forum topic #55533
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Subject: "RE: Reciprocating room CG #2" Previous topic | Next topic
Bill WestMon Oct-23-17 02:55 AM
Member since Feb 02nd 2010
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#55563, "RE: Reciprocating room CG #2"
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Hi Steve, for your Saturday post that's all looking very good. With your desk dimensions I now see the poor fit with the staircases. Just a thought however, from the Britannic drawings I get 10' between the LP exhaust pipes or 5' for each side. At the floor level, allowing 2' for a stair that starts against the LP pipe and 12" for half of a quartet of telegraph heads on the room column leaves one with 2' for walking between them and the stair. So maybe there could be enough room for the desk against the middle column. I think 24" width and 24" depth for the desk might be enough. In this Photobucket picture the stairs aren't particularly wide and do end a few feet short of the room column.



For Sunday's post the sun light effect looks very nice, I hadn't thought of much light getting down there. Anybody have the weather report for April 14?
And the questions:
1. I will need to animate the sunlight to simulate pitch & roll, also animate hanging chains. Does anyone know (or guess) the degree extremes port to starboard the ship would roll in "normal" seas?
2. How long would it take to cycle a full roll? Pretty slow I guess.
For Ralph's film clip, aside from the lady at the front clowning and despite the sunshine, that's fairly rough seas from a passenger's viewpoint. The shot with the gent near the end is more realistic for mild weather. For angle, a mere 10 degrees is easy to stand in but if you are walking about it can happen mid step and catch you off guard. For roll periods I think nearly a minute is more typical today, but maybe your time should be based on your viewer's attention span and thus the length of your video clip.

3. Are the cylinder heads bronze?
No, here we are either in warm air and dry or are saturated wet with the rust causing oxygen excluded by the steam. Also the HP cylinder head has 230 tons force on it, bronze construction would be difficult.

4. The main HP steam input and the LP exhaust appear to go through rubber (or the like) flexible joints. I assume one reason they exist is to allow a certain amount of engine movement especially at the top. If the tops of the engines were expected shift a little during operation, then by how much (in inches/fraction of inch)at the cylinder head tops? Or should they be rigid and unmovable? Even a slight movement will need to be animated.
The engines don't move. There used to be a low bass note thumping in the hull from engine unbalance in earlier ships but better engineering stopped that. The expansion joints are steel disks and are for pipe expansion from cold to running temperatures. A careful look at the following Pinterest picture shows the riveting at the pipe joints and the rim of the flex joints. Most of it is probably covered by lagging.



Bill

  

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Reciprocating room CG #2 [View all] , SteveFury, Sun Oct-15-17 09:17 PM
  RE: Reciprocating room CG #2, SteveFury, Oct 16th 2017, #1
RE: Reciprocating room CG #2, Dave Abate, Oct 16th 2017, #2
      RE: Reciprocating room CG #2, SteveFury, Oct 16th 2017, #3
           RE: Reciprocating room CG #2, Ralph Currell, Oct 17th 2017, #4
                RE: Reciprocating room CG #2, Bill West, Oct 17th 2017, #5
                     RE: Reciprocating room CG #2, Ralph Currell, Oct 17th 2017, #6
                          RE: Reciprocating room CG #2, Bill West, Oct 17th 2017, #7
                               RE: Reciprocating room CG #2, SteveFury, Oct 21st 2017, #8
                                    RE: Reciprocating room CG #2, SteveFury, Oct 22nd 2017, #9
                                         RE: Reciprocating room CG #2, Joe100, Oct 22nd 2017, #10
                                              RE: Reciprocating room CG #2, Ralph Currell, Oct 22nd 2017, #11
                                                   RE: Reciprocating room CG #2, SteveFury, Oct 22nd 2017, #12
                                                        RE: Reciprocating room CG #2, Ralph Currell, Oct 22nd 2017, #13
                                                             RE: Reciprocating room CG #2, Bill West, Oct 23rd 2017 #14
                                                                  RE: Reciprocating room CG #2, Ralph Currell, Oct 23rd 2017, #15
                                                                       RE: Reciprocating room CG #2, c riley, Nov 02nd 2017, #16
                                                                            RE: Reciprocating room CG #2, Ralph Currell, Nov 02nd 2017, #17
                                                                                 RE: Reciprocating room CG #2, SteveFury, Nov 11th 2017, #18
                                                                                      RE: Reciprocating room CG #2, SteveFury, Nov 11th 2017, #19
                                                                                           RE: Reciprocating room CG #2, Ralph Currell, Nov 11th 2017, #20
                                                                                           RE: Reciprocating room CG #2, Bill West, Nov 12th 2017, #21
                                                                                           RE: Reciprocating room CG #2, SteveFury, Nov 12th 2017, #22

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