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CDR_Ret

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About CDR_Ret

  • Birthday 02/01/1950

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  • Gender
    Male
  • Location
    Colorado Springs, Colorado, USA
  • Interests
    The physical sciences; Worldview, science, and education; Technical and educational writing; Reading: Accurate historical fiction, classical science fiction, biographies; Wood carving and ship models; research projects relating to landform origins, especially the US East Coast Carolina Bays.

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  1.    CDR_Ret reacted to a post in a topic: What is this wire made of?
  2.    CDR_Ret reacted to a post in a topic: Bug? (10/14/2020)
  3. CDR_Ret
    I was contemplating adding a new comment to an existing thread when I clicked on the Reply field at the end of the thread. The entire text of my previous post appeared in the field. Is this an intentional feature? It's been more than a day since I posted last and have shutdown and restarted my computer, so I don't think this was leftover content on the Clipboard or anything like that. Besides, I never selected the entire post. —Terry
  4.    Duanelaker reacted to a post in a topic: Hyde Windlass Company Capstan and Windlass c. 1890
  5.    thibaultron reacted to a post in a topic: New movie Greyhound
  6.    lmagna reacted to a post in a topic: New movie Greyhound
  7.    jud reacted to a post in a topic: New movie Greyhound
  8.    Canute reacted to a post in a topic: New movie Greyhound
  9.    mtaylor reacted to a post in a topic: New movie Greyhound
  10. CDR_Ret
    Ah, Sea Stories. The things we could tell...
  11.    CDR_Ret reacted to a post in a topic: New movie Greyhound
  12.    CDR_Ret reacted to a post in a topic: New movie Greyhound
  13. CDR_Ret
    Based on the novel "The Good Shepherd" by C.S. Forester.
  14.    CDR_Ret reacted to a post in a topic: Confused Need Help
  15.    CDR_Ret reacted to a post in a topic: Notched Waterways?
  16. CDR_Ret
    Thank you for the detailed response, Jaager. Now that I know what to look for, I went back to the DTM photos and discovered that there indeed appears to be a seam between the inboard waterway and the pieces filling in between the stanchions. That certainly makes a lot of sense. I appreciate your input. Terry
  17. CDR_Ret
    Here is another structural question pertaining to late 19th-century merchant ships. In the 1891 brigantine Galilee, there were massive waterway timbers (11 in. by 15 in.) visible in the photos provided by the Department of Terrestrial Magnetism (ignore the albatross). It is apparent that the waterways, or something else, filled in the open space between the stanchions formed by the upper frames. My question is this: Were the waterways notched for each stanchion, or were there filling pieces (or whatever they are called) added to close off the spaces between
  18. CDR_Ret
    And here is my reconstruction of the capstan and windlass installation in Galilee. Basically, the screw actuators that tensioned the band brakes on the windlass drum were replaced by pry bar-actuated rods that tensioned the band brakes. I'm still not satisfied with the results because the loops which the pry bar fingers engage are much closer to the base of the capstan in my model than shown in the cyanotype photo. So, either the linkage is at a different angle than in the model or there may be a different lever configuration relating to the band brakes themselves. I suspect that windlass inst
  19. CDR_Ret
    Hello Lane. Thank you for your efforts and interest. I'm in the process as we speak of changing out the local hand-crank brake actuator to the topside lever device in my digital model. Looking forward to seeing what you have. Thanks again. Terry
  20.    CDR_Ret reacted to a post in a topic: Need CAD type program
  21. CDR_Ret
    For the DELFTship fans out there, I've posted my latest project in my main plans research thread showing some of the things you can do with the program. Terry
  22. CDR_Ret
    Wefalck, Thanks for the information. In the case of Galilee, she was actually conducting geomagnetic research using very sensitive declination, dip, and, intensity instruments, as well as several standard ship's compasses in general use at the time. The ship swings were essential for cancelling the local influences to determine the absolute elements of the earth's magnetic field. As an aside, the Carnegie Institution eventually built a completely non-magnetic research vessel (the Carnegie) and continued Galilee's work into the late 20s. Sadly, the ship was destroyed by
  23. CDR_Ret
    Evidently this particular "boat" topic has never been brought up in this forum. Late in the 1800s when builders were toying around with more compact and energetic sources of energy for propulsion, they developed the naphtha engine, which used volatile fuels produced by the distillation of petroleum to either heat water to steam or, eventually, to produce propulsion by internal combustion. It was the precursor to gasoline engines. Between the 1890s and around 1905, small- to medium-sized vessels called naphtha launches were very popular with the boating public, and thous
  24. CDR_Ret
    A scholarly article on factors aiding transmission of the virus.
  25. CDR_Ret
    With regards to DELFTship, I am using the program to determine the true deck line along the bulwark of Galilee's hull plan reconstruction. I thought it might be useful for those trying to learn the program if I did a mini-tutorial as I worked on the problem. The first post of the tutorial starts here. I'm including lots of discussion on program features that are really glossed over or ignored in the program manual. Please let me know what you think of the presentation and suggest anything that could be improved upon. Thanks! Terry
  26. CDR_Ret started following Galilee's Rabbet and Need CAD type program
  27. CDR_Ret
    I have been devoting a lot of time to DELFTship in the past few weeks while "social distancing." This is the hull of the 1891 brigantine Galilee, in which my grandfather sailed between 1906–08. The hull lines are based on the G.C. Berger plans available from the Smithsonian HAAMS program. They need a lot of work to make them usable, which is why I used DELFTship. The interior views of that old ship are really amazing! Terry
  28. CDR_Ret
    Well, I've spent some of my time during the past two weeks self-isolating from coronavirus exposure to sort through the rabbet question. After taking a look at the DELFTship model as I left it last Fall, I realized that there was very poor fidelity between the model and the original Berger lines plan. So I basically decided to work over the model lines again to attempt as much as possible to approach the original lines. After several iterations, I realized that the lines in the halfbreadth, elevation, and body plans simply were not compatible, so I did the best I could to at least
  29. CDR_Ret
    Nice looking masks, Bob. My wife says she has enough elastic for the apocalypse, which she has been collecting for decades.

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