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LEGO Technic 42052 Heavy Lift Helicopter



When it comes to Lego Technic builds, helicopters are known to be one of this set’s most common subjects. The first helicopter build for Lego came out in 1977. Since then, there has been a brand new Lego Technic helicopter build being released once every two or three years – Starting off with the Lego 852 Helicopter. The Lego 42052 Heavy Lift Helicopter was also a gamechanger, becoming the first helicopter-themed Lego build to include coaxial contra-rotating rotors in it.


One of the more distinguishing features of the entire set is the general outward appearance of the fuselage, which was build with the help of Technic panels.



Thanks to the 42052’s 1042 pieces of brick, it’s quite comparable to the Lego 9396 Helicopter build released in 2012. However, its main advantage here is that it’s one of the very first Lego Technic builds to contain Power Functions inside its set. 



The whole set is encased inside a huge standard box. The front side of the box showcases the completed Heavy Lift Helicopter build, flying across a beautiful alpine forest with the Bricks and Beams Ltd. Cargo swinging from the copter’s winch wire. The build’s Power Function vehicles are shown here too, alongside a summary of the set’s entire dimensions and measurements.


The rear of the box features an opened cargo camp with the same Bricks and Beams Ltd. Cargo that’s all set for loading. This includes more of the 42052’s main playable features: Including the tail rudder and the moving elevator. There’s also a working winch and a pair of motorized cargo doors, with a motorized contra-rotating rotor and loading lamp as well. The same side of the box reveals that the 42052 does include its own B-model, with its own set of playable features. 


These instructions have all been printed out in one bound book with 188 pages in it. Also included is a gigantic sticker sheet, which comes protected right inside the same plastic bag as the instructions. The parts themselves come in eleven big bags without any numbers on them. 


More stuff can be found inside the box: Namely the Power Functions battery box with its own M-motor, six types of rotor blades, as well as two variants of black 19L soft axles.


 The special parts found inside the set include: 
1.)    Six types of 31L Lego Technic rotor blades. This part has only been found in past helicopter builds, such as the Lego 9396.
2.)    Two types of black 19L soft axles, as mentioned earlier – This portion has only been seen in the Lego 8450 The Mission build. There are two parts included here too, but only one of them is actually useful in both A and B builds. Meanwhile, the other one is simply a spare. 
3.)    There’s also a yellow Cross Axle 5M which has been found inside six sets, back in 2016. 
4.)    One more part is the red Cross Axle 6M – Has been used in five sets since 2016.
5.)    There are also two variants of blue curved Lego Technic panels, as well as a Technic beam with a crossed axle.
6.)    Two white shells with worms (aka concrete mixer barrels). The 42052 is actually the very first Lego Technic set to utilize this part in all sorts of colors, and the second one to use the same part in pure white. 


One more part making its debut appearance in this set is the 5M yellow cross axle, along with the Technic beam and cross axle and the curved blue Lego Technic plates. 


There have actually been dozens of red cross axles throughout the years. This includes a 6M version – But a yellow one hasn’t even shown up until now. There is much speculation that the usage of red and yellow colors when it comes to these two axles might serve as a change in the overall looks of Technic builds for 2017. There’s no other reason why Lego has decided to use a distinct color, apart from quick identification provided, as well as the growing amount of choices in cross axles used in past Technic builds. 


Also included in the 42052 are several orange Lego Technic bricks, which have shown up in more or less five sets.
Once you get to the 46th step in your build, you will see that the fuselage has already been constructed here. This is a bit of a drastic change coming from plenty of other Lego Technic sets, since these sets have been constructed with the help of a drive train, or a gear box.


When you reach the 114th step, the gear box, cargo door mechanism, and the winch must have already been constructed too. Two white double-angular beams are also used here as a form of display stand, and isn’t exactly a part of the build’s gear box. The coaxial contra-rotating rotors are enabled with the help of two 28-tooth small turntables. In the 139th step, the coaxial contra-rotating gearing should be done. 


The 42052’s 24-tooth gear is responsible for driving two variants of 12-tooth double bevel gears. The upper portion of the rotor has to be driven using an axle attached to the 3M gear shift connectors. These are threaded with the help of the upper 28-tooth turntable. Whatever misalignment happens on this part will only cause the friction to build up inside the general system.
Step 141 wants to merge together the rotor drive and the gearbox, with the M-Motor thrown into the mix. The next step involves combining the fuselage with the drive train. When you get to the 179th step, the rear undercarriage, as well as the cargo doors, battery box and cargo bay, must be fully assembled. There’s loads of room found inside the cargo bay. You should also have assembled the build’s elevator, tail, and twin rudders by step 238.


The 42052 contains a registration coming from the OK-MLX. This simply means that the Heavy Lift Helicopter was designed by Milan Reindl, one of Lego’s chief designers. ‘OK’ serves as the aeronautical country code for the Czech Republic – Where Reindl is from. 
In the Lego community, Reindl also goes by the nickname ‘Grohl’. The community itself is grateful to have him on the team, since he can convert his love of building and designing future Lego builds into a full-time job. His main contribution is becoming a designer for Lego’s Technic sets.
The 240th step fuses the tail with the copter’s main fuselage. The vehicle’s cockpit must be completely assembled once you arrive at step 279 – Since this is where the 19L soft axles are now used. There are two curved kinds of blue Technic panels, which you can use as seats for your minifigures inside the cockpit. 
Both the co-pilots and pilots of the plane itself contain a flight instrumental panel. Its gauges, together with the artificial horizons, is a sticker placed on top of a dark grey stone tile measuring 2 x 2. The rounded tile gauge, measuring 1 x 1, is also another printed part in the build. 
Lastly, the moment you arrive at step 299, its contra-rotating coaxial rotors must be assembled by this point. The white shells with the worms (once again – concrete mixer barrels and not actual worms) can be used as a form of turbine engine color. The last couple of steps comprise of the Bricks and Beams Ltd. Cargo container.


The finished build in itself looks absolutely amazing. It measures around 53 centimeters x 60 centimeters x 23 centimeters. It’s pretty much a very large set. In fact, the Heavy Lift Helicopter build has actually set a record for the most number of Technic panels found in a singular build: There’s 51 of them in total, just one panel more than the Lego 42025 Cargo Plane, which was released back in 2014. And thanks to this, the entire fuselage in itself has been covered up in panels, which provide a lovely real-world look and feel to the finished copter.

Apart from the aforementioned white panels with a 5 x 11 angle, the remainder of the panels have been included inside the Lego Technic system for so many years now. This just proves that even just one cleverly-built design can build a nice set all in all.

You can open up the Power Functions with the flip of a switch, as it is hidden as the anti-collision red light found on the vehicle’s belly. 

The 42052 contains two forms of gearing systems: The left-side gear works on the cargo doors, as well as the winch wire mentioned earlier. Meanwhile, the gear on the right works on the contra-rotating rotors, along with the loading lamp. Both gear levers can be found right below its turbine engines. The elevator is manually handled using a lever beneath the tail. The twin rudders are connected to each other with the aid of an axle – But there’s no control system involved. 

You can open up the cargo doors during flight, and there’s no clearance to have both of these doors opened up whenever the helicopter lands on the ground. 

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