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Pagani Huayra BC


This time I have a model that is different in many ways. It may look like just another 1:10 scale LEGO Technic supercar, but it’s conception, the execution and what will happen to it are all different than normal.

Pagani Huayra BC
Side view

It all started in May 14th 2018 when I sent a message to Grum64, a member of the Eurobricks forum. Grum64 is posting detailed accounts of the process of him building official LEGO Technic sets.

Now you could think that this is something many people do, but the special thing about him is that he is a C4/C5 tetraplegic. In layman terms, he is paralyzed from the neck down. Despite this massive handicap he has a cheerful, buoyant take on life. Even though it takes him weeks to assemble a set that I can build in a couple of hours, he keeps his spirits high and shows incredible determination to get the task done.

So when he finished the largest LEGO Technic model in existence at the time I sent him a message that I wanted to design something for him as a token of respect for him. I told him in the same message that I wouldn’t take no for an answer, since he is the kind of guy that would refuse such an offer.

As predicted he wanted to refuse, but since I didn’t give him that option he instead proposed to design a model and then auction it for charity. I agreed on the condition that he would determine the model. After careful deliberations he chose the Pagani Huayra.

Pagani Huayra BC
Another side view

We than quickly settled on the colourscheme of the BC version and the design could start. I don’t know whether it was due to the special circumstances, or because of the design of the real car, but I have never had a design that was such a joy to work on. From day one the design simply flowed from my fingerprints.

I started with the gearlever, since that is such a centerpiece in the design of the real car. I wanted to get the same functions in that lever as the real car has. That meant to design a lever that could move sideways to select between Drive and Reverse. With the LEGO gearbox elements that automatically gave a Neutral in between. When the lever is in the Drive position it should be possible to move it forward and backward to shift up and down.

I drew inspiration from a lot of different cars I had designed up to this point. The gearlever mechanism was inspired by the mechanism in my BMW 328 Hommage. The adjustable chairs with their own HoG’s are much like the ones in the Mercedes-AMG GT R. The HoG of the gearbox was the last addition to the design and was inspired by the similar HoG on the Aston Martin DB11.

Pagani Huayra BC
All shells open

One of the challenges of building LEGO Technic supercars is to make them stiff enough. For this car that was extra hard because there is no central column in the car. Normally that is a major part of the structural design. Instead the model uses torsionducts at the doorsteps. I had a similar design in the McLaren 675LT Spider, so I drew inspiration from that. The endresult is a model that is so structurally sound that you can lift it by the roof with hardly any flex in the chassis.

One of the joys of designing this model was the way the puzzle pieces continuously seemed to fall in place. In the real car for instance the gearbox is mounted transversally in the chassis to save space. I wanted to replicate that, because, surprisingly, that would save space. As a consequence it made a lot of sense to use the old type differential. And that meant that the whole rear axle could be built lower, because that differential is just a little bit smaller.

The cantilevered suspension setup was another such pleasant surprise. The old yellow triangle pieces seemed just perfect for the upper cantilevers. But that meant that the lower wishbones should have a length of 2.8 studs (2*sqrt(2)) to keep a parallel travel of the wheel. Using a 4×4 bent liftarm in the chassis a near perfect geometry was possible that gave a close to vertical travel.

Pagani Huayra BC
Front view with the BC colourscheme

I can continue with these examples, but I’ll restrain myself to just one more example. One of the (many) defining elements of the Huayra is the aerodynamics package that consists of flaps in the front and rear of the car. I wanted these to be in of course, which meant I needed to route two axles all the way from the front to the back. When it was time to add them I found that there were actually two 1 stud wide channels available in the chassis. If I would have designed for it they wouldn’t have been better placed.

The real Pagani is an amazing work of art. There are so many details that make this car unique it forced me to think about every part I added. The engine is a mix of carbon fiber, gold-coloured metal and big grey pipes, enclosed in a mesh of thin rods. I’ve tried to replicate it as truthfull as possible.

Pagani Huayra BC
The V12 engine, cantilevered suspension and 8D-N-R gearbox below it

The rearview is just as expressive. There is no detail on this car that doesn’t immediately identifies it as Pagani. The signature 2×2 grid of exhausts, the slightly tilted lights and everywhere the ellipse shapes from the Pagani logo.

Pagani Huayra BC
The rear view with the rotated rear lights

The little black panels above the upper blue line are the rear aerodynamic flaps. They are operared with the steeringwheel. That aforementioned blue line is actually made from parts that are not available in blue on the market, because LEGO never released them. I however had still a few in my collection from the time that I worked as a LEGO Technic designer.

The attention to detail is of course nowhere so visible as in the cockpit of this beautiful car. We chose a dark-blue and white interior with chrome accents and a few blue details to bring that BC colouscheme inside as well. This colourscheme is carried to the inside of the doors as well.

Pagani Huayra BC
The opulent interior with the custom chromed parts

Of course there is also a video available on my youtube channel:

When the model reached the finishing stages Grum reached out to the Pagani company to see if they would like to sponsor our charity auction. To our delight they responded very positive. They in fact offered two huge computer drawings of the real Pagani Huayra BC, signed by Horacio Pagani himself. They will be added to the auction of course.

One of the autographed drawings and the tube it comes in.

All in all this model was an absolute joy to design and build. As I said at the start, this model will be auctioned for charity, so you can become the owner if you place a bid. The auction will be held on Catawiki from April 19th-26th 2019.

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Bladerunner spinner


Time for a post on a quick model I have finished some time ago, but didn’t get around to post about. It is the Spinner of the movie Bladerunner.

Bladerunner Spinner
In fly modus

The model is motorized with three functions:
– Opening left door
– Opening right door
– Switching between fly modus and drive modus

The last function is actually a bit more intricated. It consists of the following movements:
– First the covers around the front wheels move outwards
– Then the covers rotate 90 degrees
– And at the same time the front wheels come down

Bladerunner spinner
In drive modus with open doors

I also made a video of it.

Instructions are available in the shop.

Leg godt,


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Liebherr LTM11200


After nearly 10 months of hard work I am finally able to present the LEGO Technic replica of the Liebherr LTM11200 crane. It is one of the biggest roadworthy cranes in the world and I have tried to do it justice in LEGO as well.

This is actually a redesign of the model I made in 2013. At that time I had designed the carrier, the superstructure and the outer section of the boom. I have gone through the entire design, updated it to improve on the weak points of the original design and updated it to the newer parts that are now available. I also designed the complete boom from the ground up.

When I started this model I wanted to make it the most complex remote controlled model that I could think of. At the same time I didn’t want to exceed the limitations that the LEGO PF system set. Which meant no more than 8 motors could be used in the model.

They are equally divided between the carrier and the superstructure. In the carrier one motor is used for switching, whereas the other three are used to drive different functions depending on the position of that switch. It has two positions. In position 1 the three motors are used for driving, steering and switching the steeringmode (you can steer normally, or you can crabsteer). In position 2 the three motors are used to expand the outriggers, elongate the outriggers and finally extend the outrigger feet.

In the superstructure a similar setup is used, only this time there are four positions for the switch. Which gives 12 different functions that can be remotely controlled. Of these 12 functions 8 are located in the superstructure itself:

  • Rotating the superstructure *
  • Raising/lowering the counterweight
  • Raising/lowering the hook
  • Raising/lowering the boom via the cylinders
  • Raising/lowering the boom via the rope-and-pulley system
  • Raising/lowering the arm of the operator cabin
  • Rotating the arm of the operator cabin
  • Tilting the operator cabin

And 4 functions are routed onto the boom:

  • Extending the 4 section boom *
  • Spreading the stabilizer arms
  • Tilting the stabilizer arms *
  • Raising/lowering the supporting legs (needed in case the boom has to be transported separately from the rest of the crane)

This model was always intended to push the edge of the possibilities with LEGO Technic. And unfortunately that edge pushed back. The model is incredibly complex (as an example: it uses over 300 gears) and doing all that in plastic proved to be too difficult for some functions. The functions with an asterisk require manual assistance when operating. And believe me, even though lifting the boom is possible by combining the cylinders and the rope-pulley system, it is really scary to see how much force is going through all that plastic.

Nevertheless, I feel that this model does not meet my quality standards. I therefor decided that I will offer instructions at 50% of the intended price, which means you can buy the instructions for 37.50 euros instead of 75 euros. You will be able to pay full price for the instructions if you want to encourage me to keep pushing the Technic boundaries with my upcoming models.

A big thank has to go to Merlijn Wissink who spend a huge amount of time on making the instructions. The instructions are done to LEGO standards and fill a book of 1174 pages. We did our best to make sure that every step is clear, but as you can imagine I might have missed something. Please let me know if there is anything unclear and I’ll try to explain what was intended.

The partslist on Rebrickable was also compiled with the utmost care, but also here errors could have been made by me. If you find out there is a piece missing (or too much), please let me know and I will update the list.

I hope you enjoy building and playing with this model as much as I did designing it. The end result is a nearly one meter long mammoth that can reach up to 2.5 m high. It is by far not the biggest crane made out of LEGO Technic, but it sure is one of the most complex.

Leg godt,


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Millennium Falcon


It has been quiet on this blog for quite some time. However that didn’t mean not much was going on. In fact a whole array of exciting models are going to appear in the coming weeks. They all happened to be ready around the same time.

I will kick off with my LEGO Technic version of the Millennium Falcon:

Millenium Falcon
Millennium Falcon

Since it is a LEGO Technic model it has a few working features. First of all the top gun turret is fully articulated. By turning the controls you can rotate the gun 360 degrees in the horizontal plane, but independently it can also rotate from horizontal to vertical. This gives a full hemisphere coverage above the ship.

The landing ramp is also remotely operated. By turning the control on top of the corridor to the cockpit the ramp lowers and closes.

The radar dish can be adjusted as well, but has no special controls.

Millennium Falcon
Millennium Falcon rear

This model was made as a commission without an exclusivity clause. I therefore made instructions for a slightly adjusted version (with fewer rare parts, but with the same functionality). Instructions can be bought in my webshop.

Finally here you can find a video of the model.

The Millennium Falcon is a trademark of Disney. They do not endorse, sponsor or authorize the instructions, this replica nor this website.


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Liebherr LTM11200 WIP


Time for another update on my Liebherr crane. I have made a first version of the 4 stage boom. The thing is massive! It weighs over 4 kg, it has 90 long panels (3×11 curved, 3×11 flat, 5×11 flat) in it and it reaches 2.5 m when fully extended.

Liebherr LTM11200
This is the fully extended position

Due to the weight it is now impossible to lift the boom with just the cilinders. So I added a system with rope and pullies to lift the boom. There is some fearsome bending of axles in the current setup when the boom is lifted, but it works.

I devised a new way of extending the boom to maximize the size of the inner sections, but also this system is struggling with the sheer weight of it all.

Rotating the superstructure has also become impossible with out a helping hand.

On the plus side, the whole crane can stand on it’s own when fully extended, which is an awesome sight. Also the speed of the ropes is not as slow as I feared.

Even though it looks finished, it is not. There are still quite some things to improve:

  • The rope for lifting the boom and the extention of the cilinders need to go to the same group of RC operations (if you remember there are 4 sets of 3 functions each in the superstructure).
  • A driving mechanism for extending the inner sections needs to be made that is strong enough (at least it is self braking now)
  • The structure where the pulleys in the rear are connected to needs to be strengthened (there are even some form-locked constructions that are being pried apart)
  • The stabilizer arms need to lift further upwards
  • The small LA’s in the stabilizer arms need to be replaced with big LA’s (that will bring the total amount of big LA’s in this model to 12)
  • The rope for the hook needs to be properly guided along the boom
  • The legs to put the boom on when moving the boom from the carrier to a transport wagon need to be designed and added

Here is the heavy road configuration version (without the extra pulleys to lift the boom):

Liebherr LTM11200
This is the road configuration

Finally I am pleased to announce that the work on instructions has started. So please stay tuned.

Leg godt,


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Ferrari Testarossa


Here is my latest commissioned model, the Ferrari Testarossa.

Ferrari Testarossa (side)
Ferrari Testarossa

This car has been a childhood memory for me. I remember seeing it for the first time and I was blown away by it. It is really special that I have had the chance to make one in LEGO. As usual I have tried to add as many authentic features as possible:

– Independent suspension on all wheels
– Steering with Ackerman geometry and working steeringwheel
– pop-up headlights with a
– 5+R manual gearbox
– Flat V12 fake engine
– openable hood, doors, trunk
– adjsutable seats
– detailed engine bay & interior (with working glovebox 😛 )

Ferrari Testarossa
The popup lights can be operated from the dashboard

If you like what you see and want to commission a model yourself, please pop over and apply for your own commission.

To finish a shot from the top to show the bodylines and a shot of the enginebay:

Ferrari Testarossa (top)
Ferrari Testarossa

Ferrari Testarossa (engine bay)
Inside lies a flat V12 engine

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WIP Liebherr LTM11200 (part 2)


Here is the second post about my current project (or more accurately one of my current projects), the full RC Liebherr LTM11200 crane. It is the superstructure:

Liebherr LTM11200 Superstructure

This superstructure is packed with functions, 13 in total. All are RC, but only 4 motors are used. Combined with the 4 motors of the carrier this gives a total of 8 motors for the entire vehicle. And that is exactly the number of motors that can be individually controlled with the LEGO Power functions system.

In the center of the structure a big gearbox is used to switch between 4 groups of 3 functions each. Just as in the carrier each function is colourcoded in either red, yellow or black. Red is coupled to the XL motor and is used for the heavy jobs, like lifting the boom and rotating the superstructure, whereas yellow and black are coupled to L-motors. The switching is done with a M-motor.

The grouping is as follows:

  • Group 1
    • Yellow: Rotating the arm of the cabin
    • Black: Raising and lowering the cabin
    • Red: Tilting the cabin
  • Group 2
    • Yellow: Winch 1
    • Black: Winch 2
    • Red: Boom function 1 (which will be extending the boom. This way it is possible to extend the boom and wind down the winches at the same time)
  • Group 3
    • Yellow: Boom function 2
    • Black: Boom function 3
    • Red: Rotate the superstructure
  • Group 4
    • Yellow: Boom function 4
    • Black: Raising and lowering the counterweight
    • Red: Raising and lowering the boom

The superstructure also has one manual function, namely opening the cabin with a slidedoor.

As with the carrier a lot of attention has gone into the structural integrity of the build. The whole structure is formlocked where possible and longitudual beams are running along the bottom and topside to guide the forces towards the mounting with the carrier. As you can see in the video I used a brickbuilt rollerbearing for maximum support of the superstructure.

I made a short video to showcase all the functions:

And here is a final shot of the superstructure mounted onto the carrier in limited weight transportmode:

Liebherr LTM11200 Carrier and superstructure

That’s it for now.

Leg godt,


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WIP Codename Silvestros


Here is another work in progress project that I have been working on for some time now. It is 1:8 scale supercar. This project is a cooperation with Marco van Overbeeke.

Marco is a talented freelance automotive designer who has earned his stripes in the hypercar market. Recent projects are the Dendrobium electric hypercar (exterior and interior together with his brother Andries van Overbeeke) which debuted at Geneva 2017, and the livery design of the Lunar Red exterior of the 2019 Aston Martin Valkyrie for Kris Singh. You can find more of Marco’s work on his website and instagram.

Here is a first bodywork sketch he made for me:

Exterior sketch Silvestros
Exterior sketch Silvestros

At this moment I am perfecting the chassis. I have redesigned the chassis three times from the ground up. Reason for that is that there is quite a complex mechanism inside. This car will namely feature 4 wheel steering that is dependent on the gear it is in.

When you are in first gear the front and rear wheels steer in opposite direction. When you are in fourth gear the front and rear wheels steer in the same direction. And when you are in second or third gear the behaviour is something inbetween. When you are in reverse only the front wheels steer. This whole behaviour is controlled with linkages. connected to both the steering wheel and the sequential gearbox (with working paddle shifters next to the steeringwheel).

Here is picture of the chassis as it is now:

Chassis V3 for the Silvestros