[MOC] Compact SUV

[Pawlo]

Hello everybody,
I would like to present to You my first MOC: Compact SUV. Gol of the project was to create a model, which would follow the parameters of SUV and Crossover cars, that we can see nowadays on our roads. Inspiration for this MOC were products of certain car company, but it's not a perfect copy of any specific model. Basic parameters are:
- dimensions in studs: 53x24x24, weight aprox. 1,7 kg,
- propulsion: 2 LEGO XL PF motors,
- steering by LEGO Servo Motor,
- communication with model by sBrick, power by custom 11,1 V Li-Ion power cell,
- gear ratio 1,2:1,
- max speed aprox. 6 km/h,
- differentials designed and 3D printed by Efferman.

Enjoy the video!

 

Edited November 17, 2016 by Pawlo

[agrof]

Very good SUV, I like it a lot - especially the first useable trank in such a MOC!  Maybe the middle sections between and beside the doors should be orange too.

How much add the custom differentials to the performance? At least in the video I can not see anything, what the normal differentials couldn't handle.

[proran]

That is gorgeous! This is the level of performance I would like to see in a Remote-Controlled MOC. Perfect balance between speed and torque. The key is, I believe, the right selection of size and motors. Really good job! The video is great too. I love that shot with the slipping wheel in a cloud of dust. Beatiful detail! I will double the agrof's question about the custom differentials. Thanks for sharing.

[Jurss]

Compact?!

[Leonardo da Bricki]

Very nice job for your 1st model! Looks good, lots of details, interior, good performance = Do you have the scale ratio and serial number for those tires? I am having trouble finding them.

[Lox Lego]

congrats on your first model!  It has a great color scheme. Welcome to Euro-bricks!

[Myers Lego Technic]

It could be cleaned up a wee bit, but the overall look is good! Very nice! 

   Myers 

[Pawlo]

Thanks everyone for Your kind words, especially because some of Your works were great inspiration for me  :) Building this model, testing it and then making a movie for the first time was a great experience. Nevertheless now I can see a lot of things I could do better. I hope to take them under consideration when I start to build next MOC :)

As for the performance and custom parts: During beta testing I've tried a lot of configurations of the engines, gear ratios and parts used in the transmission. Couple of differentials were damaged during them, but none of them was the one made by Efferman. I think they can take more stress than the Lego parts. Big diffrence was made by using this part than the original from Lego (CV joint was able to rotate in it, part made by Efferman is tighter). CV joints are from Lego, because those 3D printed are too fragile.

Here You can read more about tires I've used. 

 

[Kmuffin]

That's a great moc for your first moc here. It works very well. I'll hope to see more of your work.

[HorcikDesigns]

It looks great! 
would it be possible to share with us more info about the custom battrey? And how to connect it to the S-brick without damaging it?

[Pawlo]

Sorry guys, but I've made mistake when I was checking the voltage of the power cell. Correct, nominal voltage is 11,1 V. Power cell consists of 3 x 3,7V Li-Ion cells. Originally they were used in laptop battery, then formed in one piece. Photos below show the modification in Lego cable:

Parameters from Sbrick when fully charged:

Sbrick doesn't have problems with this voltage, I think because it's not valid ;) As far as I remember, voltage on fully charged battery is around 11.7-12 V. 

Edited November 17, 2016 by Pawlo

[JJ2]

Really cool, from my memory the sbrick is supposed to be rated at 10.8V without it getting damaged, one way to have precise control and higher voltage is use a ESC and receiver from hobby RC cars, I have done something like this but not with higher voltage, the remote has about I want to say more then 40meter range in a open place .