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)
(above = 4 minute walk around)
(above = 4th field test)