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GBC 45 Stunt Circus – 42100 Building Instructions

(5 customer reviews)

Original price was: €29.95.Current price is: €24.95.


Difficulty level: Easy - Medium - Hard

Detailed building instructions of the GBC 45 Stunt Circus made from parts of the existing LEGO 42100 Liebherr R 9800 set.

Including:
– Full HD PDF building instructions (Preview)
– Explanation & understanding of mechanisms
– Fine tuning tips & tricks
– Interactive software with explanation
– Premium support 💎

Not Including:
– The required LEGO set 42100. Available at    Amazon.com   &   ebay.com   &   LEGO.com   & Bricklink
– GBC Balls  →  Choose color
– (Optional) GBC Funnel Turbo Spin - Right  →  Learn more or Add to cart
– (Optional) GBC Looping Quick Ring - Right  →  Learn more or Add to cart
– (Optional) USB Power Box - PU Technic Hub  →  Learn more or Add to cart

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It has never been easier to build a complete Great Ball Contraption (GBC) loop yourself! It is way bigger than the original LEGO model and it features multiple GBC modules which all work together in harmony to make a full loop so the ball flow will never end. This GBC is entirely built using only parts from the LEGO Liebherr R 9800 and can be referred to as Alternate Build of the 42100. When building this GBC it makes sure you master the GBC building techniques and tricks so that you eventually also can build your own GBCs. The whole machine is powered by multiple LEGO motors which comes with the LEGO 42100 set and controlled/programmed via the official LEGO Powered Up App.

 

 

 

Multi Automation Motor Madness

 

 

Let’s state the obvious. The GBC 45 Stunt Circus is HUGE! With a footprint of 94 cm (37 inch) by 71 cm (28 inch) and a height of 63 cm (25 inch), this GBC is one of the bigger and tallest GBCs we have ever created so far.

For the GBC Balls to undergo some new experiences in the GBC 45 Stunt Circus the GBC Balls first have to go up. The Paternoster Lift Module takes care of that on the left side. This effective lift moves GBC Balls up one at a time and drops them at the top. The beauty of this elevator is that in theory you can make the lift much higher but that is not required for this GBC. At the bottom a clever timings mechanism loads a GBC Balls at just right time to fall in a carriage of the lift.

Once above a flip flop mechanism splits the GBC Balls over 2 paths. The left path shoots the GBC Balls, after a steep slide, against the yellow Jump Ramp Module where the GBC Balls will make a fun jump. Optionally you can click our GBC Looping Quick Ring – Right in place, replacing the yellow ramp. It is so much fun to see the balls make the looping so fast! If for some reason a balls doesn’t make the ramp or looping they will be bypassed to the next module.

The right path after the flip flop rolls the balls onto the optional GBC Funnel Turbo Spin and drops them onto the Tilting Turning Table Module. This module has 4 dimensions how it can influence the behavior of the rolling GBC Balls. The first two are the up and down movements on 2 sides of the table. Next the table rotates 360 degrees and last but not least there are 2 spinning elements which can hit balls and/or block paths. This all makes this module very random and a lot of fun to watch in action. Smart gearing inside the table makes it all possible and building is also a lot of fun!

Next the GBC Balls will be queued for there next explosive experience! Right ahead, the Shooter Module takes one ball at a time and loads them on the shooting track. After a short amount of time a heavy weight will knock the devil out of it and shooting it directly at the big catch tray. 4 colorful targets are waiting to be hit. You can adjust the slope of the shooting ramp so you can decide how high and fast the GBC Balls should fly to the other side.

After the GBC Looping, the Tilting Turning Table and the Shooter Module, the 2 paths will rejoin again and go to the high Elevator Module. This mechatronic module is powered by 2 motors which have to work in sync to make the module work. The auto mode allows the module to run on its own while a manual mode allows the user to control the motors. In auto mode 9 GBC Balls will be loaded in the elevator one by one. After that the lift will raise to its top and automatically release the GBC Balls. The motors are controlled by 1 LEGO Technic Powered Up Hub and programmed via the official LEGO Powered Up app. This is all carefully explained in the building instructions.

The GBC balls are caught in one of the longest return paths we have ever used and brought to the Spinning Table Module. A perfectly round platform/table spins super fast and the speed and direction can be controlled by the user. GBC Balls are dropped in the middle of the platform. Due to centrifugal forces the GBC Balls will be pushed to the outside against the railing. Many GBC Balls can enter simultaneously and it creates pure chaos! You can also decide the make the table spin slowly and wait for the GBC Balls to pile up. Then suddenly release to power and watch the GBC Balls fly around. All GBC Balls are being caught and return to the Paternoster Lift Module.

 

Fun Fact


Having the control over 2 separate Control Plus hubs (which are included in this LEGO set) really got us thinking from the very beginning how to implement this power into a unique and fun concept. The main thought was about having interactive elements which the user can control and/or automate. Many ideas raised from remote controlled GBCs to multiple collaborating GBCs. We always are intrigued of those automated car factories where robots work flawlessly together in a beautiful pattern. What if we could do the same with LEGO. So we did and the rest is history ;)

 

 

 

Work Together – Enhance building skills

 

The whole GBC is split into different parts/modules which are assembled together during the build. Ideal for working in groups as each builder can work on a sub assembly and later click everything together. Because of this construction and flexibility it is also always possible to separate the modules again and make your own unique configuration or use modules as separate machines.

A really cool feature of the GBC 45 Stunt Circus is its ability to convert with ease into a GBC Layout Module. You can simply add your other GBC Modules to the left side and drop the GBC Balls on the long ball path. A split output on the right side can carry the GBC Balls to the next GBC Module. Simply switch the door positions so that GBC Balls can take another route and enter another GBC. In this way you can easily connect this GBC to all our other GBCs to make the loop even bigger. More information in the building instructions. Clean and simple: Convert with ease.

 

It is not possible to move the whole structure at once and it’s required to take it apart in a few, easy to disassemble, sub parts. We advise to place the GBC on a solid plate. Footprint GBC 45 Stunt Circus: 94 cm (37 inch) by 71 cm (28 inch).


Building Instructions Preview

Preview


Try before you buy. We completely understand. See the building instructions previews on the left or try one of our free building instructions.






Upgrade your GBC 45 Stunt Circus


To enhance the fun and play and to take the GBC 45 Stunt Circus one step further we have optional parts available.
In the building instructions is explained how to easily upgrade the GBC 45 Stunt Circus with various parts.


GBC Funnels

Optionally you can add the GBC Funnels which makes the complete GBC even more engaging to watch. Many GBC Balls can enter the GBC Funnels at once which makes for a mesmerizing sight!

   Learn more!





GBC Loopings

Optionally you can add the GBC Loopings which turns your GBC Balls up side down for a split second on super speeds!

   Learn more!









USB Power Box

Never in need of batteries ever again! Power the GBC 45 Stunt Circus with our USB Power Box.
How cool is that!

   Learn more!








The GBC 45 Stunt Circus all over the world

Have you build our GBC 45 Stunt Circus yourself, with your friends or family? Film and share as we would love to see it!

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5 reviews for GBC 45 Stunt Circus – 42100 Building Instructions

  1. Jacqueline Segeth –

    I built the track myself, my husband helped with the fine-tuning. For example, ensuring that the balls actually end up in the loading container. Programming was a thing, I had an outdated version of the instructions. Well helped by Marion, updated the building instructions and software, then got everything working. So much fun! Now going to try GBC 41 :)

    https://www.youtube.com/watch?v=eTmaRCjw7Ww

  2. Anne Haim –

    Building the model was a lot of fun, for sure! Programming was very easy. To see the mechanisms working is fun as well. There were some issues. Parts come loose, especially around the shooter mechanism. Balls got stuck. I enforced some parts, and replaced others (like using normal axles instead of the “self-made axles” on pages 25 and 158). After some tweaking, everything works as expected. This has to be my favorite GBC I build so far.

    • PV-Productions –

      Hi Anne, Great to hear you build our GBC 45 Stunt Park and you have enjoyed the building process and programming.
      What you describe during operation should really not be happening.
      The “self made axles” you describe are clutch-coupling mechanisms and are a safety feature which you should never replace with normal axles. These clutch-couplings prevent damage to your LEGO if for some reason the mechanism gets blocked by hand etc. If you notice that the clutch-couplings are too weak you should check the cause of this first and try to fix this. Most of the times the mechanism you have build is running with too much friction preventing the module to operate properly. Can you check all the moving parts to see if they can rotate freely. Perhaps also power it by hand so you can feel any resistance.

  3. Szilard Gyalay –

    Great build , needs adjustments but all in all a nice outcome .

    Video can be found at. https://youtu.be/QbcRgxVnrIQ

  4. jazzrockar –

    Overall a fun build. It loses some balls here and there and sometimes they get stuck. I had to rebuild some parts where the friction was not enough to get axles to turn.

  5. Lara Leimanis –

    Impressive, has not lost 1 ball.

Add a review

Software - The easy way


After building the GBC 45 Stunt Circus you can control the machine using the official LEGO Powered Up App or the Pybricks software. Both options have their advantages and disadvantages. We recommend Pybricks but read all the differences down below.

Pybricks

Control the GBC 45 Stunt Circus independently with code that runs locally on the LEGO Powered Up Hub. No paired phone/tablet required after programming.

After you have some experience with the software we encourage you to modify our software and make it your very own. What new features can you come up with?
Download the Pybricks Python code below and go to the Pybricks programming environment for further explanation.

Download the Pybricks Python code for the GBC 45 Stunt Circus:






LEGO Powered Up App

Control the GBC 45 Stunt Circus using the official LEGO Powered Up App, available on Android smartphones, tablets, Iphones and Ipads. This allows you to create custom software and add a user interface which is carefully explained in the building instructions.
After you have some experience with the software we encourage you to modify our software and make it your very own. What new features and functions can you come up with?

Download and install the LEGO Powered Up App for your smart device:


Download our code for the GBC 45 Stunt Circus to recreate it in the LEGO Powered Up App:




For some extra background information and know how, get to know all the blocks in the LEGO Powered Up App:
LEGO Powered Up App Blocks Guide

Check the full LEGO Powered Up App compatibility










If you don't have the required LEGO set there is still a chance you can build our models by using parts you already have. Most technic models use a lot of the same and/or replaceable parts. When watching the video and checking upon the building instructions you can easily see which parts can be replaced if you desire so.
What cool color designs can you come up with?!

Optionally you can also directly import the part list to Rebrickable. Some warnings may pop up during importing due to part/color number inconsistencies between databases. Most of the time these are not to worry about and Rebrickable will give you a nice overview of it.









v1 17-09-2021: Launch

v2 22-09-2021: Fixed a few minor step orders and doubled parts. Fixed Shooter Module loading pin was in wrong orientation (page 152). Added missing part loading mechanism Paternoster Lift (page 43). Fixed misplaced part to attach GBC Funnel (page 63). Increased ramp slope to slow down GBC Balls and to prevent overshoots in some situations (page 346).

v3 05-01-2024: Updated the Hardware & Software page on page 16. All the software is now available on the product page. Fixed wrong port letters for the hubs on page 16. Fixed missing part on page 382. Fixed wrongly rotated parts on page 393. Updated Pybricks code to handle exceptions in case a motor is not connected.

















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