1. Thank you for visiting HeavyEquipmentForums.com! Our objective is to provide industry professionals a place to gather to exchange questions, answers and ideas. We welcome you to register using the "Register" icon at the top of the page. We'd appreciate any help you can offer in spreading the word of our new site. The more members that join, the bigger resource for all to enjoy. Thank you!
  2. ALL NEW MEMBERS READ THIS FIRST!! Thank you for joining Heavy Equipment Forums! If you are new to forums we communicate with "Threads", please search our threads to see if your topic may have already been answered and if not then click "Post New Thread" in the appropriate forum. This will allow all of our members to see your question and give you the best chance to be answered. After you've made a number of posts you will graduate to Full Member status where you'll see a few more privileges. Following these guidelines will help make this the best resource for heavy equipment on the net. Thanks for joining us and I hope you enjoy your stay!!

1/16th radio-controlled scale model of Russian CHTZ T-800 dozer

Discussion in 'Models and Miniatures' started by tournaphil, May 6, 2016.

  1. tournaphil

    tournaphil Well-Known Member

    Joined:
    Oct 3, 2011
    Messages:
    72
    Location:
    .
    modelt8002345web.jpg
    completed-assembliesweb.jpg
    chtzt8002334.jpg

    Hi Guys. I recently completed this 1-16th scale model of the Russian ChTZ T-800 (T.75.01) bulldozer with Tilt-Blade and Ripper. The model is completely accurate in dimensions to the original 1:1 machine.

    The 1:1 machine sits in between the D11N and D11T or just above the Komatsu D475-2 or just under the Komatsu D475-5 for a size comparison, weighs 106 tons with blade and ripper and has an 820hp engine with 4-speed power shift trans. It was made in the early 1980’s and at the time, was the largest crawler tractor in the world. At present, it still remains the largest crawler tractor to be manufactured on the European continent. Nine machines only were allegedly built. One machine still exists at the factory museum in Russia.

    The model is designed in a Russian CAD program from the original factory machine plans by my friend in Russia. From those CAD drawings I made 2D DXF files myself and had the all the parts laser cut in metal. So I want to point out that I did not design the model, my friend in Russia did that, I did the 2D drawings for the laser cutters. The tracks are made in 3D SLA laser-sintered aluminium polyamide compound.
    The frame is all welded 3mm steel sheet. The 8 per side bottom rollers have pre-loaded suspension rated 4.5 kg each.

    The model is 34'' long, 15.75'' wide at the corner tips and weighs 60.5 lbs. It has Radio Control using a Turnigy 9XR Pro 8 channel radio, power is by 2 x 25Amp 12 volt dc car seat motors @ 190 rpm with a final drive reduction of 4:1 at the sprockets. Battery is a 12v 12Ah SLA. Motor controllers are one DE 2x32 for the drive and two DE 2x5’s for the blade and ripper respectively. Final drive is #35 simplex chain drive to 8mm drive shafts.

    The model can push or pull 34.54 lbs at traction break on concrete (tested with a digital bag scale). The blade and ripper are operated by screw actuators. The blade tilts and the ripper tooth can be angled as well.


    Time to make drawings: Approx 300 hours. To build model approx 2000 hrs.

    Here is some links to the machine being tested at a closed coal mine. You'll find 6 videos all up. (Just type in CHTZ-T-800 model in youtube)

    https://www.youtube.com/watch?v=McxEmBQQzOM

    (above = 4 minute walk around)

    https://www.youtube.com/watch?v=2u0fJL94y5Q

    (above = 4th field test)
     
    mikebramel likes this.
  2. tournaphil

    tournaphil Well-Known Member

    Joined:
    Oct 3, 2011
    Messages:
    72
    Location:
    .
    Update

    blade parts laser cut.jpg blade mig-welded.jpg blade finished with draft arms and tilt cyl..jpg ripper.jpg ripper finished 1.jpg
    Update. Some more pics of the big Russian. Blade parts laser cut, blade fabrication, finished blade, Ripper parts laser cut. The finished ripper.
     
    Last edited: May 9, 2016
  3. Rentalmechanic

    Rentalmechanic Well-Known Member

    Joined:
    Jul 30, 2015
    Messages:
    59
    Location:
    Memphis,tn
    Man that is nice
     
  4. Couchbound

    Couchbound New Member

    Joined:
    Jun 12, 2010
    Messages:
    1
    Location:
    Tasmania
    Looking good.

    That looks amazing.

    I wish I had half the patience and skill you've got!:cool2
     
  5. tournaphil

    tournaphil Well-Known Member

    Joined:
    Oct 3, 2011
    Messages:
    72
    Location:
    .
    Update

    Here's an update. The model has been super-detailed off the 1:1 machine, those embarrassingly stupid looking actuators for the blade and ripper are gone. They are replaced with a set of ripper barrels and blade lift rams correctly scaled off the 1:1 machine plans that I made myself and turned up on the lathe. The model is now completed. I'll run some new vids down at the coal mine in November and put up some new tube links.

    Next model I am intending to start next year is the Komatsu D575A-2 SR with straight tilt blade (not super dozer) in 1/16th radio control. Currently working on the plans for that. I expect that model will weigh 80lbs +.
     

    Attached Files:

    Last edited: Oct 24, 2016
  6. Twisted

    Twisted Senior Member

    Joined:
    Oct 29, 2007
    Messages:
    386
    Location:
    MN
  7. old-iron-habit

    old-iron-habit Senior Member

    Joined:
    Nov 23, 2012
    Messages:
    3,842
    Occupation:
    Retired Cons't. Supt./Hospitals
    Location:
    Moose Lake, MN
    Hi Tournaphil, I think I met you at the little coffee shop in Santa Margarita, CA last spring when 8 or so of us were setting up antique equipment for the show there. I think I recall that Phil was your name. That is a very cool model and it was fun when you showed us your book of pictures and explained it all to us. I look forward to your next one. Are you going to make the show again. It will be the ACMOC National show this year on Memorial Day weekend.
     
  8. tournaphil

    tournaphil Well-Known Member

    Joined:
    Oct 3, 2011
    Messages:
    72
    Location:
    .
    Hey OIH, yep, I remember you at the Santa Margarita coffee shop - Glen got us the lunch. I'd just got over from Chicago for the BOTW after Brownsville PA show. Sorry for the lateness of my reply,forgot to check back here. Yes I'll be there again,in fact I'll go a few weeks early and help Glen with getting all the machines down from Petaluma or wherever they are. Look forward to catching up again. Cheers
     
  9. old-iron-habit

    old-iron-habit Senior Member

    Joined:
    Nov 23, 2012
    Messages:
    3,842
    Occupation:
    Retired Cons't. Supt./Hospitals
    Location:
    Moose Lake, MN
    I'll see you there. We are going to get there a week early also and take in the engine show the weekend before. I am hauling out a 1/2 scale steam Pheniox log hauler that a friend built. It still weighs 5,000 lbs.
     
  10. tournaphil

    tournaphil Well-Known Member

    Joined:
    Oct 3, 2011
    Messages:
    72
    Location:
    .
    Sounds good. Didn't know about the engine show, assume it's at the ranch?. Ill go to that show too.
     
  11. old-iron-habit

    old-iron-habit Senior Member

    Joined:
    Nov 23, 2012
    Messages:
    3,842
    Occupation:
    Retired Cons't. Supt./Hospitals
    Location:
    Moose Lake, MN
    No, I think it is in Paso Robles this year. My friend is the engine builder. Year before last he took half of an extinct engine he drew up on CAD. His buddy in Washington built the other half and they assembled it and had it running during the show. He has more faith in his fabrication than I do.
     
  12. tournaphil

    tournaphil Well-Known Member

    Joined:
    Oct 3, 2011
    Messages:
    72
    Location:
    .
    Update december 2016 - new video links

    UPDATE:

    I've shot some new vids of the T-800 model down at the closed coal mine. The earlier videos (youtube links) above this message have now been deleted and replaced by these since the model is super-detailed now and finished. So the old links above this post are no longer active.

    Here's the new links:

    Overburden Push – 6 mins
    https://youtu.be/6oUw-TBDPPA


    Ripping And Bulldozing - 9 mins
    https://youtu.be/MI1NXRn4El0

    Machine Walkaround - 3 mins
    https://youtu.be/4nIuJepg-iE


    This completes this model of the big Russian.

    The next model is the Komatsu D575A-2-SR. (Straignt-Blade, Single -Shank). I've been doing some of the drawings for the main frame in prep for the laser cutter. Won't be much now till end January.

    This is the version I am building:
    D575A-2-SR.jpg

    (Photo taken by kayakrazy)

    Cheers
     
  13. tournaphil

    tournaphil Well-Known Member

    Joined:
    Oct 3, 2011
    Messages:
    72
    Location:
    .
    track frames drive line test fitting.jpg

    Some interested persons have asked about progress on the Komatsu D575A model in 1/16th scale, radio controlled mentioned above. So here's the current progress: The model is being built using the manufacturers parts drawings and also using photos to drawings scaled as best I can. Tracks are finished and the drive line has been test-fitted for alignment prior to TIG welding the main frame. I'm very happy with the track chains and grousers, they should be unbreakable. I've turned up the carrier rollers on the lathe recently. This thing is already weighing in at 45lbs so its going to be heavy, I'm guessing about 70lbs with straight blade and either a single or 3-tine multi-shank like the dash-2 models had. Those motors are 12V - 25 Amp stall torque each and then they are geared down by 15.78:1 at the output shafts and again by 4.92:1 via chain drive to the final drive output shafts. The track frames are prototypes at this stage to test fit the track tensioner which is fully adjustable and can be pre-loaded to any lb rating. Though heavier by about 35 tons than the Russian T-800 in 1:1 with a straight -blade, it's about the same size as the T-800, the T-800 being longer in the track frames by nearly 2 yards. That T-800 is a big tractor in 1:1. According to reports on the internet, the D575A is no longer in production, the last machine went to Australia and, according to reports, some eighty D575A's were built. The world's two largest production crawler tractors are no more.

    More progress after Best Of The West.

    frame aligned for TIG.jpg
    prototype track frame.jpg
    Track Frame overlays.jpg
    View attachment 169056
     
    Last edited: May 7, 2017
  14. tournaphil

    tournaphil Well-Known Member

    Joined:
    Oct 3, 2011
    Messages:
    72
    Location:
    .
    Field test at coal mine 2016.jpg
    And here's another pic of the finished T-800 model being field tested at a closed coal mine.

    And here's a pic of the 1:1 at home in Russia.

    T-800 working.jpg
     
    Last edited: May 7, 2017
    seatwarmer likes this.
  15. old-iron-habit

    old-iron-habit Senior Member

    Joined:
    Nov 23, 2012
    Messages:
    3,842
    Occupation:
    Retired Cons't. Supt./Hospitals
    Location:
    Moose Lake, MN
    Thanks for the update Phil. Nice to see the progress photos.
     
  16. tournaphil

    tournaphil Well-Known Member

    Joined:
    Oct 3, 2011
    Messages:
    72
    Location:
    .
    Y
    You're welcome OIH, thanks for your interest. Look forward to seeing you at BOTW if it works out for you. I'll be there as of Mon 15th.. Cheers.
     
  17. Jakebreak

    Jakebreak Senior Member

    Joined:
    Dec 6, 2016
    Messages:
    256
    Occupation:
    operator/pipelayer/mechanic
    Location:
    Bakersfield Ca
    That is awesome would you happen to know where I could buy a rc tractor for my son he would get a kick out of playing with something like that I admire your creativity I don't think I could do something like that
     
  18. Brodiesel

    Brodiesel Senior Member

    Joined:
    May 12, 2014
    Messages:
    259
    Occupation:
    My wife makes all the $$$.
    Location:
    Winnemucca, NV
    Can you elaborate on this engine show? What is it?
     
  19. old-iron-habit

    old-iron-habit Senior Member

    Joined:
    Nov 23, 2012
    Messages:
    3,842
    Occupation:
    Retired Cons't. Supt./Hospitals
    Location:
    Moose Lake, MN
    It's of California built engines only. I found out a few weeks ago that's it by invite only. My friend has a buddy in the club. It's called the California Gold Show. Maybe being a Californian you qualify.
     
  20. Brodiesel

    Brodiesel Senior Member

    Joined:
    May 12, 2014
    Messages:
    259
    Occupation:
    My wife makes all the $$$.
    Location:
    Winnemucca, NV
    Interesting, like vintage or antique engine builds?