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RC Renault Magnum
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About this creation

Hi everyone!

Two years after I posted my third tiny RC, the Mercedes Citaro (video), I made my fourth one! Itís the replica of one of the most specific trucks. Iím sure you have already realised it on the small picture, before you opened its mocpage! The type of it is Renault Magnum. The idea of building this truck at this scale and with this brand method is quite old, but other projects and university stole the time. So Iím very happy, that itís ready! Hope you like it, too! :)



The length of the whole vehicle is 45 studs. The width of the tractor is 6,4 studs (16 plates), the width of the trailer is 6,6 studs (16,5 plates) without mirrors and other design elements. The scale is minifig scale. It has the two compulsory functions of a tiny RC, propulsion and steering. It contains approximately 820 pieces.

Because of two developments, the motions of the truck are absolutely lifelike. It'ís possible to solve almost all extreme situations, which happen with trucks in real life!

Of course a video :) :










You may realised that the trailer is not exactly horizontal. If both axles are fixed, the front wheels donít touch the ground. The weight of the trailer is on the front axle, the other axle and the wheels on it are only decorations.











It was a real challenge to figure out the front! I used almost every direction. I'm very proud of the result :)





We are transporting something very dangerous!



Technical detailes:

You may remember my yellow Daf Truck, the grille of it is my body icon everywhere (video). The Renault is similar to that, everything is in the semi-trailer, but it has two very important differences (the two developments).



Propulsion
The motor drove the wheels of the trailer at the Daf. It meant that the truck couldnít move, the trailer couldnít push the tractor if the angle of the trailer and the tractor was too close to 90 degrees.

In this truck the rear wheels of the tractor are the driven wheels. You can see the method on the pictures, how I brought the spinning from the trailer to the tractor. The right angle is not a problem any more!

Steering
I used two cardan joints in this truck and in the older one, too. The difference is the aim of the joints.

Two joints rotate the axles into vertical position in the Daf. One of them compensated the angle, which exists in bends. It means that the motor canít rotate the axle, if the angle of the trailer and the tractor is smaller than 135 degrees. The cardan joint canít spin above this angle.

In the Renault two joints have the task of compensation. So right angle is not a problem any more!



By the way we still have the good old problem with the steering. I tried to use servo motor, but it was a fail. The motion goes through a wormscrew, many gears and the two cardan joints from the motor to the steered wheels, so the backlash is big. The servo motor canít bring back the wheels into middle position after steering. Servo motor is useful, if it is as close to the steered wheels as possible. For example in a bus. In a Mercedes CitaroÖ If you are technic fans, you may remember that we can find cardan joints between the wheels and motor in 9398. But that set is very big, so the same difference is smaller problem there, as at minifig scale.

The inside picture without lines and letters:



I used the same building method here, as in my monorail. There is a technic frame inside, and it is covered by system elements. The frame is stable and works well without the elements of the body.



My earlier tiny RCs: Daf, Routemaster, Mercedes Citaro

The LDD file doesn't contain some elements of the steering mechanism between the two front wheels, it's the meaning of the lime plates. You can see these elements on the pictures or in the video.

Thanks for visiting and I hope, itís not too late to wish you a happy new year! :)


Building instructions
Download building instructions (LEGO Digital Designer)

Comments

 I like it 
  January 25, 2015
I live in France and it's my favorite truck ! Amazing creation !
 I made it 
  January 24, 2015
Thank you very much for your comments! :)
 I like it 
  January 23, 2015
Awesome work! I'm loving these minifig RC vehicles. Really awesome how you do this. Lovely!
 I like it 
  January 14, 2015
Just saw this and it is fantastic! Fitting so much into a small package is no small feat :)
 I made it 
  January 10, 2015
Thanks for your kind comments! Great to see, that you like it! :)
 I like it 
  January 10, 2015
Durva jůsŠg!
 I like it 
  January 8, 2015
Brilliantly done Gabor. Lovely!
 I like it 
  January 7, 2015
Very, very cleverly done. To do a moc that looks this good AND works at any scale is nice going, but 6-wide ?? Incredible.
 I like it 
  January 5, 2015
woooow :o awesome
 I like it 
  January 4, 2015
Wow! Great Job, GŠbor! You are the master of minifig scale RC vehicles!
 I made it 
  January 4, 2015
Wow! Thanks for these long and amazing comments my friends! I really appriciate them and I'm very happy that you like it! :)
Gabor Horvath
 I like it 
Matt Bace
  January 3, 2015
I am always very intrigued by these tiny RC models. In many ways, they are more impressive feats of engineering than the large Technic models with loads of functionality. Putting it all together in a nice-looking package must be extremely difficult. Great work!
 I like it 
  January 3, 2015
What a fantastic model! Well done!
 I like it 
  January 3, 2015
Great work of Lego "RC" creationism! Well done.
 I like it 
  January 3, 2015
Fantastic job, it was impressive as a minifig truck, let alone all the technic and rc components! I loved the video too!
 I like it 
  January 3, 2015
WOW Great work Gabor!!! I love the front! 5/5
 I like it 
  January 3, 2015
Wow, this is as a great model to start the new year. You really have been creative to hide all the technique under its elegant exterior. Excellent way to get the Reanault mark incorporated in front.
 I like it 
  January 3, 2015
Very cool. Nice design and functionality.
 I like it 
  January 3, 2015
super! bravo!
 I like it 
  January 3, 2015
Great functionality and talented built.
 I like it 
  January 3, 2015
This is Great ! So much functionality in such a limited space.
 I like it 
  January 3, 2015
I am absolutely stunned and amazed by the beautiful engineering of this model. To pack so many big Technic components into such a small space and to get the working functions is so impressive. Some really ingenious design solutions to the problems too. Great work: like a well designed wrist watch.
 I like it 
  January 3, 2015
Hi Gabor! I wish You and Your Family a Happy and Lego Creative New Year! What a fantastic start! Just WOW! Great combination of the technic and the city feeling!
 I like it 
  January 3, 2015
Astonishing work. You are more of an engineer, than a lego-builder. The design and shaping are gorgeous. Keep this work up!
 I like it 
  January 3, 2015
Wow, a lot of fantastic techniques were used here! I really love how you did the cab/front and the nearly invisible integrated rc stuff. Absolute incredible work :)
 I like it 
  January 3, 2015
Dude that is very clever and it looks awesome too. Happy new year!
 I like it 
  January 3, 2015
Absolutely fantastic work, Gabor. I really liked watching this in action on the video. Very tricky to engineer at this scale, the way you've crammed in the functions and not sacrificed any looks is pure genius
 I like it 
  January 3, 2015
Beautiful, it all looks amazing for the scale!
 I like it 
  January 3, 2015
Great work, you must be proud of the result on the front end, it turned out amazing, with the logo in the middle of the front grill, the rest is nicely done as well.
 
By Gabor Horvath
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