OT: Remote controlled Scale model of Russian dozer.

Hi guys. Phil from Australia here. I had the pleasure of meeting Old Magnet at Best Of The West tractor show at Santa Margarita Ranch in C.A. today. Old Magnet was very interested to see a photo album of the build of my model dozer along with some vids I had with me on my laptop and we spent some time discussing it. Old Magnet suggested I should put it on ACMOC as an OT. So here's a brief description of the model some pics and links to the vids of it on you tube.

This is a 1-16th scale model of the Russian ChTZ T-800 (T.75.01) bulldozer with tilt-blade and ripper. The manufacturer, CHTZ-UralTrac (also known as 4T3) is the same company that built the Russian Stalinez Cat 60 and 65 under licence to Caterpillar. The 1:1 machine sits in between the D11T and the D475-5 for a size comparison, weighs 106 tons with blade and ripper and has an 820hp engine, three-stage torque convertor and four speed power-shift trans and double reduction final drive. The blade on the 1:1 is 22ft wide which is about the same as a D575-2. 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. It was designed specifically for ripping frozen rock in the diamond mines in Russia. Blasting was not possible due to damage to the diamonds which resulted in hairline cracks when polished, so ripping only was used. Eight or nine were built for this application in the Yukut Diamond Mines. One exists in the factory museum in Russia today which can be seen in the first photo. The second photo shows the bottom roller suspension arrangement which utilizes torsion bars across the main frame like a tank.

The model is designed in a Russian CAD program by my friend Sergey in Russia with help and consultation and photos from my other friend in Russia, Vitaly and also the manufacturer, CHTZ-UralTrac of Russia. So I want to make it clear I did not design the model, it was designed from the original machine by Sergey in KOMPAS 3D CAD in 1:1 scale. From those drawings I made DXF files myself in 1/16th scale and had the parts laser cut in metal and the tracks were made in France in 3D SLA laser sintered aluminium. Quite a lot of small engineering work such as the draft arm trunnions and trunnion balls were made by small engineering job shops in Australia. The frame is all welded 3mm steel sheet. The 8 per side bottom rollers have pre-loaded suspension rated 15lbs each.

The model is 35 inches long, 16 inches wide at the corner tips and weighs 60lbs. It has RC control using a Turnigy 9XR Pro 8 channel radio, power is by 2 x 25Amp 12volt dc motors of 190 rpm with a final drive reduction of 4:1 at the sprockets giving 17rpm at the sprockets which is 1/16th scale at 1.4 KPH scale. 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 simplex chain drive to 8mm drive shafts.

The model can push or pull 35lbs at traction break on concrete tested with a digital bag scale. The blade, tilt and ripper are operated by screw actuators. It's a working model as the videos show. The engine sound track is from the real machine.


[attachment=36243]CHTZ T-800 at factory.jpg[/attachment]
[attachment=36244]T-800-rolling gear.jpg[/attachment]



https://www.youtube.com/watch?v=McxEmBQQzOM
(a 4-minute walk-around of the machine idling)

https://www.youtube.com/watch?v=nLGbWYp6u-U
(8-minutes of the dozer working at a closed coal mine in Australia)

https://www.youtube.com/watch?v=2u0fJL94y5Q
(14-minute video working in coal mine tailings)

Update 10/21/16. Updated photos with new ripper barrels, blade lift rams and super-detailing.

Hi, Phil.
Great stuff. Thanks for sharing. I have a little knowledge of these jiggers and you have added to that knowledge. Great work and great detail.

Just my 0.02.

Thanks Deas, glad to share. The factory in Russia were very helpful too with drawings and photos. You may be interested to know CHTZ-UralTrac have manufactured in excess of 1.2 million crawler tractors to date. The man who designed Henry Ford's factories in Detroit (Albert Khan), also designed and supervised construction of the CHTZ factory in Chelyabinsk, Russia. Small world.

Wow, that is terrific .

That is a fantastic working model, congratulations, you should feel well rewarded for your excellent work.

Hey OzPhil2,

Thank you for introducing yourself at the Best of the West 2016 Show. Thanks for going to lunch with us so I could see your photo book. You do Great Work. See you next year...
Glen

[quote="7upuller"]Hey OzPhil2,

Thank you for introducing yourself at the Best of the West 2016 Show. Thanks for going to lunch with us so I could see your photo book. You do Great Work. See you next year...
Glen[/quote]

You're welcome Glen. Was a pleasure meeting you guys. Thanks for all your efforts and that of your fellow exhibitors for the time and expense trucking all that big gear to the show so we could enjoy it. Not often one can see a 660 working at a show these days. I've been all over USA the last two months to equipment shows and every one has it's own great unique features but certainly IMHO Best of The West was the best live earthmoving show. I'll be back in for 2017 a week early to help set up like I do in Brownsville. PS: Thanks for lunch BTW, my turn next time.

Cheers

Glad to share wombat. If you are ever in Brisbane look me up and I'll show it.

cheers

Happy to share, I wanted a working model not a mantle piece and as the vids show, it achieves the objective. I've broken a track link twice but its easy to repair, press out pins and bushes and replace 2 complete grouser/links at a time.
cheers

Hey OzPhil2,

Did you get a manufacturers warranty on that model? Maybe the guy that made it will warranty it...
Hahaha

[quote="7upuller"]Hey OzPhil2,

Did you get a manufacturers warranty on that model? Maybe the guy that made it will warranty it...
Hahaha[/quote]I made it, others made the plans in 1:1 which I converted to 1:16 for the laser cutters.