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atic: 1:35 Bronco XXIII with interior

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  • Thanks….I just enjoy how everything comes together.

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    • Thunk…..the sound of my jaw hitting the floor.
      If you can cut, drill, saw, hit things and swear a lot, you're well on the way to building a working model sub.

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      • The Diesel firmly sits on its foundation and the cooling water pump, the respective piping, and the manual emergency pump are in their places as well. Everything fits with less than 1/10th of a millimeter tolerance. I'm so happy. I also installed the platform beneath the door to the control room that also acts as cover for the open tube pit below. Also a tight fit....I'm happy.

        Cheers Andreas

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        • Jaw dropping stuff on display here, Doctor. I'm taking notes.

          David
          Resident Luddite

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          • Thanks Davis....that's a big compliment.

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            • Originally posted by DrSchmidt View Post
              The Diesel firmly sits on its foundation and the cooling water pump, the respective piping, and the manual emergency pump are in their places as well. Everything fits with less than 1/10th of a millimeter tolerance. I'm so happy. I also installed the platform beneath the door to the control room that also acts as cover for the open tube pit below. Also a tight fit....I'm happy.

              Cheers Andreas

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              this level of detail and fit is insane. I can't wait to see the whole boat completed. out of this world stuff.

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              • What notes? I am throwing my hands up in the air thinking this is magic and pixie dust.
                If you can cut, drill, saw, hit things and swear a lot, you're well on the way to building a working model sub.

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                • Thanks folks...I'm very happy with the result, too. The next steps are pretty much straightforward....Diesel clutch, electric motor, reducing gear, e-motor clutch. What will be more challenging then will be the belt drive to the creep motor, as this will have to be perfectly aligned with the motor that is suspended from the machine room roof. Lots of ways to get that wrong....

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                  • Originally posted by DrSchmidt View Post
                    Thanks folks...I'm very happy with the result, too. The next steps are pretty much straightforward....Diesel clutch, electric motor, reducing gear, e-motor clutch. What will be more challenging then will be the belt drive to the creep motor, as this will have to be perfectly aligned with the motor that is suspended from the machine room roof. Lots of ways to get that wrong....
                    Strips of Electrician's tape would be OK stand-ins for the belts.
                    Resident Luddite

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                    • Dr. I think you’re a genius or insane. In any case, good job.
                      Of the 40,000 men who served on German submarines, 30,000 never returned.”

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                      • Click image for larger version  Name:	XXIII-259.jpg Views:	0 Size:	77.3 KB ID:	164979 I also found out, that I had the clutch design for the belt drive wrong. I did some research about the Diesel engine and the belt drive clutches. Found this little article:

                        https://cybra.lodz.pl/Content/5939/D...gineClutch.pdf

                        and this drawing of a XXIII belt drive clutch:

                        https://uboatarchive.net/Design/Desi...PlateIIS43.jpg

                        Both, the Diesel and the belt drive clutch operate the same way. You have a sliding ring that actuate toggle joints that press the couplings against the clutch housing when the ring is pressed towards the clutch. When released (ring slides out), the clutch opens.

                        The belt drive clutch and the clutch of the main electric motor were mechanically interlocked, so that the e-motor clutch is open when the belt drive is engaged and vice versa. I had this wrong in my original layout, where both sliding rings would have moved in the same direction. So I changed the pivot point of the lever (light blue color) actuating the belt drive clutch and now it works contrary to the clutch of the main electric motor. Looks better too...

                        Last edited by DrSchmidt; 09-23-2022, 03:02 AM.

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