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Here is my next model, a 1:10 scale replica of the BMW X3. This model was made as a non-exclusive commission. It is my first model that uses SBricks to control the model.

A view with the iconic grille

My customer wanted to have a model that would have both a manual mode as well as an RC mode. And since the BMW X3 is a four wheel drive car with multiple drivetrain settings he would like to get that replicated as well. So inside there are four motors that are used to drive (2L motors), steer (1 M motor) and select the drive mode (1 servo motor).

The side view with the slanted lines going from the front to the back

The drive modes that can be selected are:

  • manual mode
  • rear wheel drive
  • rear drive with driven center differential (effectively giving a 75-25 power distribution between rear and front axle)
  • four wheel drive
A rear view shot

Next to the motors the model is also equipped with eight LEDs for the front and rear lights. The outer LEDs function as indicator lights as well as normal lights. Everything is controlled through an SBrick profile on your smartphone.

PDF Instructions are available in my webshop. JaapTechnic has made stickers for this model, these are available on his website. The partslist can be found on Rebrickable. A custom profile for the SBricks can be found on the SBrick site.

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Large helicopter


I’d like to present my latest model. This time it is large motorized helicopter. It has a rotorspan (if that is a word) of one meter and also the body is one meter long. It has all the controls that you expect in a helicopter:
– Collective pitch control
– Cycling pitch control
– Anti-torque tail rotor control

Side view with the doors closed and landinggear retracted

The controls can be operated manually either from the cockpit (cyclic sticks, collective levers and anti-torque pedals) or through small HoG knobs on the rear underside of the main fuselage. It is also possible to add four servo motors to the model to control all these functions remotely via IR.

Furthermore this helicopter is equipped with a retractable rope at the side, a fully articulated camera/searchlight under the nose and a retractable landinggear. All these functions are motorized as well and remotely controlled via IR.

The camera/searchlight in the front can rotate 180 degrees side-to-side and 360 degrees front-to-back

Finally the doors in the front can open as well as the sidedoors that can slide backwards to give access to the spacious interior. When closed these doors sit completely flush with the fuselage.

The model is so large that it is difficult to get proper photos of it, that’s why I chose in this case to only show renders.

Topview that shows the massive one meter rotor-span

Instructions for this model can be bought in my webshop. The partslist can be found on Rebrickable. Please note that the four servomotors and two of the IR receivers are only needed if you want to have motorized flight surface controls. If you are fine with manual flight surface controls you can omit these motors. You’d still need the four M-motors and the remaining two IR remotes and receivers to control all the other functions.

Finally, be warned that unauthorized reproduction of this model, its instructions or its pictures is illegal and you run the risk of being prosecuted for it when you do it anyway.

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1:10 scale Pagani Huayra

A red and black beauty with medium stone grey accents. Breathtakingly detailed and packed with functionality. Released as an exclusive limited run of only ten sets. Delivered in a high quality German packaging container. Here is my latest model, a 1:10 replica of the Pagani Huayra.

The Pagani Huayra

This model is like no other model. It has over 2700 parts. It features an 8 speed gearbox that is controlled through the gear shift stick in the center console in exactly the same way as the real car. It’s clamshell bonnets can open to reveal the cantilevered suspension setups on all wheels. A detailed V8 engine sits in the back, surrounded by all the tubing and piping to feed air and fuel to this hungry monster. Hand of god wheels are placed discretely in the model to operate the chairs, the gearbox, the steering and the drive height adjustment of the front wheels.

A front view with the butterfly doors opened

The aerobrakes in the front and back are moving like the real car when going through a corner. In every part of the car the design is replicating the details from the real car. From the iconic ellipse-shaped front lights to the quadruple exhausts. The interior is decorated in warm, dark hues of brown, grey and gold. The chairs are fully adjustable.

A view from the passenger side showing the luxurious interior

The model uses flexaxles in abundance to recreate the smooth curves of the original car. Despite the curves and angles in the bodywork the model is extremely stiff and can lifted by the roof without fear of it breaking apart. The stiffness of the structure is generated in the same way as the real car through a monocoque structure surrounding the cockpit.

The smooth lines running from the front to the back are clearly visible in this shot

The instructions will be printed in full colour on glossy paper, while the parts will be packed in a high-quality German storage system. This set is limited to ten copies due to some of the rare parts used in this model. It can be ordered through the webshop and will be delivered with free shipping.

The imposing rearview with the slanted rearlights and quad exhausts
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F14A Tomcat

With the lockdown keeping us all confined to our homes giving us way too much spare time I decided to release the instructions of the Tomcat I built a couple of years ago. At nearly 4000 pieces and with a myriad of functions it is a build that will keep you occupied for quite some time I hope. You can buy the instructions in my webshop. When you have two sets of 42066 you’ll have about half of the pieces needed to build this model.

I wrote a longer article on all the functions here, but here is a short summary of the functionality:

  • Motorized landing gear
  • Motorized landing gear bay doors
  • Motorized Gatling gun
  • Motorized onboard pneumatic pump
  • Motorized swing wings
  • Motorized cockpit canopy
  • Pneumatic arrester hook
  • Pneumatic air brakes in the wing and on the fuselage
  • Pneumatic leading edge slats
  • Pneumatic intake bleed doors
  • Pneumatic delta wings
  • Pneumatic switch to choose between the inboard pneumatic pump and the of board manual pneumatic pump
  • Manual joystick that is connected to the control surfaces
    • Differentially operating elevons
    • Both rudders
  • Manual ejection system. This will eject the canopy and the two chairs

Stay home, stay safe.

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The blue brothers


After a long, long period of silence it is time to showcase some new models. One I already blogged about a while (actually over a year) ago, the other one is a non-exclusive commissioned build. Both of them are inspired by models of the same supercar manufacturer, but I am not allowed to use their name, so you’ll have to guess for yourself which company that is.

Let me start with the elder brother.

Il Toro Azzurro

This model came out of a cooperation with Marco van Overbeeke. Marco is a talented freelance automotive designer who has earned his stripes in the hypercar market. He designed the bodywork, like he would for real cars and I converted that design into LEGO Technic. Here is the final result:

Il Toro Azzurro

This car has a V10 in the front, a 4 speed sequential gearbox operated with flappy pedals at the steering wheel, a D-N-R switch in the console, independent suspension on all wheels, 4 wheel drive and of course all doors can open. But the feature that makes this build special is the 4 wheel steering. Not only does this car have 4 wheel steering, but it also changes behavior depending on the gear you are in. In first gear (low speeds) the wheels steer in the opposite direction, so you can turn in a tighter circle. In fourth gear (high speeds) the wheels turn all in the same direction, so you can go smoother switch lanes at high speed.
A second special feature in this car is the fact that the bodywork is completely removeable from the chassis:

The bodywork can be taken off the chassis in one piece

Instructions for this model are now for sale in my shop.
The partslist can be found here.

The PF Tribute

The second blue brother is another supercar. Below it is shown in a dark-blue, medium-blue livery, but since the medium blue is full of rare parts I made instructions available for a dark-blue/white combo. Also this car is righthand drive, whereas the instructions are for a left-hand drive version.

A convertible supercar, what more can you wish for?

It of course has the usual supercar features:

  • A V10 engine in the back
  • An 8 speed gearbox with separate D-N-R switch in the central console
  • Independent suspension on all wheels
  • Electrical flappy pedals, using a servo motor to switch gears
  • Normal steering

And it also has a couple more special features:

  • The front suspension can be raised using the LEGO PF IR remote control
  • The roof can open and close using the LEGO PF IR remote control

Especially the convertible roof mechanism is a joy to watch. Have a look at the video below to see it in action and keep in mind that only one button press is needed to complete the entire process of opening the deck lid, folding out the roof and closing the lid again.

Watch the roof mechanism in action

Also for this model instructions are for sale in my shop.
The partslist can be found here.

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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,