Wednesday, September 23, 2015

Spark Raid Buggy with SBrick and Instructions

My two last buggys ware small and quick, so this time I wanted to build a big one.

And here is it: big and faster than you probably think...

To get better control in long range I have used SBrick.





The overall size is 50x30x21 studs (~40x24x17cm). The wheels used the ref no. 92912, from the Unimog set.

To do it as fast as possible I have built it very simple and light, it only has 698 parts, and the weight is only 1.3 kgs.


It is powered by 4XL motors, 2 for each axle with 1:3 final gear ratio. With so many motors it needs to use 2 batteries and 2 SBricks.

The max speed is around 8kph (5 mph).


I have used a special configuration for the motors to get the best possible preformance.

With it the transmission is very simple and it only has 4 gears... and nothing more. Simple and effective.




The suspension configuration is a double wishbone in both axles.

It is every soft and with long travel, essential to go fast on bad terrain.



The steering are controlled by a PF Servo motor and working steering wheel



Available Free LDD Instructions

Download it HERE (downloaded times)

Finally as always a complete video in action:


19 comments:

Unknown said...

I love your creations! If those were official sets I'd buy them in an instant :)
How about the durability of the driveline components (driveshafts, gears) when using that much power? Those bigger builds always concern me because they put quite some strain on some of the smaller components.

Unknown said...

Thanks!!!

Lego Geek said...

Hello:
Love your creations! I would be interested in knowing more about how you wired the 4 drive motors to the 2 sbricks. I also would be interested in know how you setup the sbrick profile that controls the buggy on a tablet. Maybe a future post could be about how you use the sbrick in your creations and how the profile is created that controls the creation.
Mike,

Anonymous said...

Thanks for your instructions, can't wait to try it out !!

alexis santos said...

Very cool, the speed is awesome, it isn´t a problem not having a diferential when steering.

Francisco Rayon Navas said...

Se pueden abrir las instrucciones con una tablet o debe de ser por ordenador?

Sheepo said...

Debería ser posible pero no lo he intentado, ya que están en formato HTML.

Anonymous said...

Hi Fernando. Why is S brick a non lego part? It's used for legos. It can connect to legos. And I found it in bricklink

Sheepo said...

Because it is not made by Lego company, it is done by a third party company

Anonymous said...

Okay. Thanks How do you connect the S brick to motors and battery box? Is it the same as Ir Receiver or not?

Sheepo said...

It is like the IR receiver, but you need a extension PF wire to connect Sbrick to the battery.

Unknown said...

I also would like to know how you set up the sbrick configuration having 4 gears.

Anonymous said...

I finally finished building it yesterday!!! I am still waiting for my second SBrick to arrive but it already performs quite impressive with just one battery box. That was my first complex MOC i build based on LDD only and it was a pain in the a... Most of the building was pretty straight forward but when i came to the front and rear axle support it showed that those should have been assembled to rest of the body at the very beginning and not at the end of the construction (as suggested by the LDD). So I had to partly reassemble the very stiff construction in order to squeeze the base coach holms through the frames (parts 64179) of the axle supports. So if you attempt to build it, study the design thoroughly and construct the two axle supports first and try to attach them as soon as possible to rear and the front. That will make it much easier. The servo is not in the part list but needed. It is very easy to figure out where it has to be assembled (this should be done as soon as possible as well). The wiring and programming of the SBrick is not mentioned as well. Since the motors are mounted opposite you have to reverse the direction of the opposite motors. In the SBrick profile you can assign more than one port to one slider, so you can setup different virtual gears by assigning not all motors to a certain slider (i guess that was meant by sheepo when referring to gears. I did not experiment with this since I do not have 2 SBricks) yet. By considering my hints, it should be much easier to build it. Have fun. Ychsel

Sheepo said...

Really good comment, thank you. The LDD doesn't have the Servo motor because when I published the instructions LDD doesn't include the servo part. You have discovered why I can't publish instructions for my big and really complex cars in LDD format... it is almost imposible to follow.

Unknown said...

Don't the wheels slide on the ground and make turning difficult? On one of my cars, it almost ruined the drivetrain.

Sheepo said...

No, because this buggy has been designed to be used on low drag surfaces, like sand or little rocks.

Dennis Marinus said...

Hi will you be creating pdf instructions of this as well in the near future? Real cool buggy.

Panu Gaming said...

Hey Sheepo, two question can you create a pdf construction? The LDD is very cool, but is not a step by step manual construction.
I tried with 4 M Motors, it's also good, why didn't you build these with 4 M's?

Sheepo said...

LDD can generate the instructions step by step like PDF ones, and step by step in 3D. I used 4XL because I wanted all power I could add, and XL motor has twice power than M motor.

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