Re: CAT330D-L full hydraulic
 

In the meantime the links to another video of the Cat 365 at work and the hydraulic motor (latest version) running...

http://youtu.be/KAFrNXdCKX4

http://youtu.be/ThN9p7tunOM

Re: CAT330D-L full hydraulic
 

EXCELLENT!! I will gladly wait. After watching the most recent video of your tracks on youtube and the power and speed I know this build it going to be the best one ever! I will keep an eye on this thread and youtube. 👍🏻

Re: CAT330D-L full hydraulic
 

Wow! The track's looks great, speed seems perfect, this is a masterpiece!

How much tourqe do the track's have?

Re: CAT330D-L full hydraulic
 

Erik, what size and Kv motor is that running the pump, and whose pump is it?
I need one for my project....

Re: CAT330D-L full hydraulic
 

Paolo may be able to assist as well

http://www.rctruckandconstruction.co...play.php?f=117

Re: CAT330D-L full hydraulic
 

here is a link he posted, but he says you need to special order they don't list it http://www.vivoil.com/en/

Re: CAT330D-L full hydraulic
 

Thanks trucker1970. Im working on making my own for now, but having trouble figuring out what motor to use. Thinking something in the 300Kv range to get the right flow, but not sure if it will have the torque to get the pressure. Hate to spend money on the wrong part. I have a thread started on the forum,http://rctruckandconstruction.com/sh...ad.php?t=12595

Re: CAT330D-L full hydraulic
 

oh NICE! I'll check it out

Re: CAT330D-L full hydraulic
 

Hi guys,

Thanks to trucker1970 and Azonic!

@ DavidF:
The pump shown on video is by an italian brand: "Vivoil, oleodinamica Vivolo" with a displacement of 0.25cc, max 9000 RPM. The brushless motor is a 1000Kv 25A outrunner and work with a 3s LiPo.

See you soon....

Re: CAT330D-L full hydraulic
 

Thank you Erik79

Re: CAT330D-L full hydraulic
 

Hi guys,

Forgotten to answer to Azonic; the hydraulic motor setup like you see in video has a wheel torque of about 24-25 Kgcm at 25 BAR and can hold, without be backdriven at all, a torque of about 22 Kgcm.
But in this version the displacement is 15 cubic centimeters (for a wheel turn), so around twice the one of the first prototype.
Not a huge value, but is already proportional to the scaled torque of the real machine: the Cat 330D has a thrust equal to its weight, 30 Tons, and the model has a thrust of about 12 Kg like its final weight.

See you....

Re: CAT330D-L full hydraulic
 

How do I get the drawing of a hydraulic motor?

Re: CAT330D-L full hydraulic
 

Hi 550166681,

Drawings of a real scale motor/reducer are easy to find on the net, search for excavator hydraulic final drive, excavator wheel drive, excavator wheel reducer, or something alike.

But in the case of a reproduction in 1/14,5 or even in 1/12 the drawings you can find are quite worthless. You can't downscale and replicate the complex design of a real motoreducer in a model. You have to make your own project symplifing a lot, reducing the number of components in the assembly and fixing your attention on efficiency.
And it's very hard, both the design and the build.

Re: CAT330D-L full hydraulic
 

A phenomenal build you have there. Great build skills, & an excellent engineering feat is the end result. You've got great talent for this stuff.

Re: CAT330D-L full hydraulic
 

Hi skeeter,

Wow, many thanks!!
I'm very happy that you like my work!

I saw some of your works too; really not bad.
You look interested in hydraulic, have you ever tried something alike?

Goodbye friend...

Re: CAT330D-L full hydraulic
 

For now, the hydraulic stuff is a little out of my budget. Some day, I will have a hydraulic excavator.