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1/16th radio-controlled scale model of Komatsu D575A-2

Discussion in 'Models and Miniatures' started by tournaphil, Mar 28, 2018.

  1. tournaphil

    tournaphil Active Member

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    I have finsished the 1/16th radio-controlled scale model of the Komatsu D575A-2. I am creating a new thread here for it instead of tacking it on to the CHTZ-T-800 thread. Here's a photo of the finished model and few build pics along the way. It has already been field tested in the rolling gear during fabrication and worked out fine. I expect to give it a video -run down at the closed coal mine soon and put some vid links up here to find it on the youtube channel.

    DSC05105.jpg
    Setting up the first drawings for scaling at 1/16th scale.

    DSC05124.jpg

    Making a cardboard model of the main frame before sending drawings off to the laser cut.

    track-frames-and-rock-guard.jpg
    Track frames and rock guards
    grouser-plates-formed-and-d.jpg

    Grouser plates formed and drilled
     
    Last edited: Mar 28, 2018
    mikebramel likes this.
  2. tournaphil

    tournaphil Active Member

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    track-frames-finished.jpg

    Track frames finished

    welding-main-frame-componen.jpg

    Welding main frame together

    main-frame-welded.jpg

    Main frame components formed and welded

    frame-painted.jpg

    Frame and rolling fitted and painted Komatsu yellow.
     
  3. tournaphil

    tournaphil Active Member

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    cardboard-model-of-blade.jpg

    Cardboard model of blade before sending drawings to laser cut.

    blade-and-GET-bolted.jpg

    Blade finished with ground engaging. I did not weld the blade, my friend Dave rolled the sheets on a set of slip rollers to get the three center sheet radii and the tri-planar curves of the end bits accurate and welded the laser cut parts with a TIG and made a nice job of it.
     
    Last edited: Mar 28, 2018
  4. tournaphil

    tournaphil Active Member

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    k-link.jpg

    Fitting and setting up the adjustable Komatsu-type K-Link diagonal bracing and ball joints for the blade tilt.
     
  5. tournaphil

    tournaphil Active Member

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    D575A.jpg

    Here's a photo of the finished model along the way. Weight is 77lbs. Initially I intended to fit a single shank however,many photos of the Dash-2 that I came accross were fitted with a multi so thats what i made. More buld pics soon.
     
    mikebramel, Labparamour and Camshawn like this.
  6. tournaphil

    tournaphil Active Member

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    ripper-ready-for-tig.jpg

    Ripper components aligned and ready for the TIG.

    ripper-completed.jpg

    My friend Dave Tig welded the ripper and made a nice job of it. Shown here connected to the drawbar and undercoated and has the actuators for lift and pitch fitted for testing. I tried commercial actuators and they all failed miserably depsite the manufacturers claims and cost me a lot of money to learn the lesson. The manufacturer refused to address the issue or sell me some parts to repair them so I junked the lot and we now roll our own on the lathe, far superiorin terms of appearance, strength and operation. My RYO's use 4-start trapezoidal lead screws. Each one of those will push/pull 19 LB on duty cycle repeatedly. I also replaced all the rams on the CHTZ-T-800 with my own roll your owns and they work flawlessly. So we can now roll our own complete set to any piston lenght in a few days and made spare parts along the way so we can repair them if we have a failure in no time at all. Ready for fitting the superstructure, cab, tanks etc etc.

    superstructure.jpg

    I had the superstructue 3D printed since strength was not required and it was quick and easy. I added a lot more detail after and painted it in the correct Komatsu yellow and Komatsu dark violet blue using spray cans and painted in the pin striping as per the OEM by hand. The cab interior is fully detailed and has been fitted with tinted windows since this photo. The whole thing is mounted on an upper deck (not shown) and can be quickly removed as one entire unit to access the hull and electrical and mechnical components for repair if necessary.

    LH-finished.jpg

    Finished model. Its modelled upon an approximate 1995 year build Komatsu D575A-2 with straight-tilt bull-blade and multi-shank variable-pitch ripper.

    Everything can be stripped down into separate components as per the OEM.Then each one of those components can be taken apart for repair if necessary.
    Weight is 77lbs so in three dimensions scaled at 1/16th (77x16x16x16 = 315,392lbs for the 1:1) makes it 157 tons weight, a little overweight since the 1:1 in this particular configuration is approx 135 tons operating weight so drawbar should be somewhere around 50lbs + at traction break on concrete (yet to be proven). That completes the build report, field test videos are next.
     
    Last edited: Mar 30, 2018
    mikebramel likes this.
  7. gtermini

    gtermini Well-Known Member

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    That's an impressive build! Very cool.
     
  8. tournaphil

    tournaphil Active Member

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    Links to the videos of the D575A model. )Thanks to our friends at socalearthmovers for permission to use the audio soundtrack from their videos of the D575A.)

    RC Model Bulldozer Komatsu D575A-2 (Bench rip 5 minutes #6)


    RC Model Bulldozer Komatsu D575A-2 (Bench stack 5.5 minutes #7)


    RC Model Bulldozer Komatsu D575A-2 (Walk-around 4 minutes #5)


    RC Model Bulldozer Komatsu D575A-2 (Bench stack (2) 4.5 minutes #8)

     
    Last edited: Apr 1, 2018
    mikebramel likes this.
  9. shovelman

    shovelman Active Member

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    Very impressive Mr. G!!!