atic: 1:35 Bronco XXIII with interior

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  • goshawk823
    replied
    Spectacular work on the antenna. I never realized how much detail was beneath the welded metal holders on the tower.

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  • He Who Shall Not Be Named
    replied
    Detail Rich!

    You're taking us all back to school, Doctor.

    David
    Attentive Student

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  • DrSchmidt
    replied
    I went on with the rod antennas, that I haven't seen recreated correctly on a model. The antennas were manually raised and lowered. For that there were guide rods left and right of the conning tower that reached from the bridge through the bridge deck down into the sail. The antennas had bases that glided on the the guide rods and that contained the connections to the antenna cables. The antennas themselves were clad in rubber to provide better grip for manually hauling them up and down. Once raised, the were secured using simple turnbuckles. I made tha antennas from 0,3 mm diameter spring steel over which I put pieces of thin-walled brass tubes of 0,8 mm, 1 mm, and 1,2 mm diameter. Antenna bases, turnbuckles, and the supports for the guide rods were 3d-printed. The antenna cables were made using 0,8 m diameter wire. I displayed one antenna retracted and one raised. The top of the antennas were guided through welded steel supports. I made those of PE parts by rcsubs and 3d-printed insets. After that I glued the starboard halve of the sail to the assembly, added the support for the UZO and the speaking tube, that protruded from the roof of the conning tower. Now filling & sanding....

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  • DrSchmidt
    replied
    I don't thik so....moving snorkel ball yes, that'd be pssible, but functional in a ballast system...no. The buoyancywould be too small

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  • redboat219
    replied
    Originally posted by DrSchmidt
    The CAD model and the print of the snorkel head are ready as well. This is about the limit what my printer is able to pull off...the gratings have 0,3 mm diameter. The head was printed in 4 pieces and glued together....

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    Would it be possible to 3D print a working scale snorkel head valve for use in a snort system?
    Last edited by redboat219; 02-17-2023, 04:31 AM.

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  • DrSchmidt
    replied
    What kept me occupied over the last week was the openings for snorkel and direction finder antennae in the roof of the sail. Position, size, shape and orientation are all slightly wrong in the kit. So I designed the correct openings in the CAD and in a first step printed a mask, that I could position on the roof of the sail quite exactly using the masts of the snorkel (6 & 5 mm steel tubes). I copied the contour and adjusted the openings to match the contour. Then I printed a frame with the correct shape and orientation of the openings ad glued it into the adjusted hole from below (won't be visible later on). Filled the gap with putty, filed everything flush with the top side of the roof, et voila....

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  • DrSchmidt
    replied
    The CAD model and the print of the snorkel head are ready as well. This is about the limit what my printer is able to pull off...the gratings have 0,3 mm diameter. The head was printed in 4 pieces and glued together....

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    The ocular box of the periscope and the respective pull-down wire have also found their place. The periscope is a quite complicated affair. On top the shaft seal with the deflection pulleys for the raising and lowering of the periscope. Below the compass rose with the circular light, The picture of the rose is picked up by a prism on the backside of the ocular box and projected into the field of vision of the operator. Blow that is the pulley ring that is attached to the wires of the pulley mechanism. Finally the ocular box....

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  • DrSchmidt
    replied
    On with the conning tower...I installed the hatch to the control room and the ladder to the bridge. Quite crammed in that barrel...also the hatch to the bridge is in place. With the starboard side of the sail secured with scotch tape it already looks like something.

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  • DrSchmidt
    replied
    Thanks for the reminder....I read about the steel prop but most probably I would have forgotten about it when the time of installation comes.

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  • MFR1964
    replied
    Outstanding work Herr Doctor, as you allready probably know, keep the prop steel like the original one.

    Manfred.

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  • DrSchmidt
    replied
    More progress: All the mast are now in place, including the head valves of the air intake and exhaust on the upper deck. I also installed the Diesel head valve, the muffler and the exhaust....in front of the conning tower the klaxon has found its place. The klaxon had been installed diagonally which necessitated a quite demanding form of the horn. I guess they knew what they were doing. But the thing that makes me the happiest is a package that arrived from the USA, sent by the one himself! The prop of the kit is a crude piece of plastic and I'm very happy that I'll be able to replace it with a cast one made by Mr. Merriman himself. No compromises on this build.

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  • DrSchmidt
    replied
    I made some progress with the interior of the sail...the masts are in place. From left to right: exhaust air mast, air intake mast, snorkel exhaust air mast and snorkel air intake mast. Hidden behind the back, of the snorkel intake is the direction finder mast. The diagonal tube in front of the masts is the vent line for the center ballast tanks with the vent valve. The brass rod in the back is the drive shaft of the gearbox that raises the snorkel. The front brass rods are the drive shafts of the valve connecting the snorkel intake to the intake mast. The two vertical tubes that reach to the intermediate deck in the sail are the fuel oil line and the respective vent line. Behind the masts is the exhaust muffler....yet to be placed.

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  • DrSchmidt
    replied
    Again a little update about the sail....allot of work has to be done integrating parts that were designed using original plans, into the sail parts of a plastic kit. So allot of measuring an adjusting had to be done. Here's the first test fitting of the masts (incoming air, outgoing air and the snorkel masts). The intermediate deck in the aft section of the sail behind the conning tower is at the wrong height in the kit, and it looks not right. So I scanned the contour of the deck and designed and printed a new and better looking one. Slowly it looks like this could work...

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  • DrSchmidt
    replied
    Yes, I exclusively use Vallejo colors (Model Air), Pigments and Washes. For filters I used to use oil-based products, but switched to thinned-down washes instead. The only oil based product I still use is light and heavy rust by AMMO MIG.

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  • rwtdiver
    replied
    Hi Andreas,

    Are you using mostly water base acrylics for your detail work?

    Rob
    "Firemen can stand the heat."

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