Thursday, November 17, 2011

TBs TechChallenge, 2011 - Reverse 9392 (Quad Bike)

TBs is now releasing the third edition from the TechREVERSE Challenge, in collaboration with the LEGO Technic product line. Thus we decided to bring one of the 1H2012 models into contest.

As usual, the challenge will consist in reverse-build one of the new models coming in 2012.
Among the several possibilities we chose one that wouldn't be just the smallest in the line, and again a model that doesn't include any new element, despite some existing elements in new colors. This is not necessarily a criteria as we may have asked the participants to simply ignore that new element, or provide you with a model for that new element, like we did in 2009. However we decided to avoid it for this time again.

So and so the set selection for the current TechREVERSE Challenge issue is the 9392 (Quad Bike).

And then the challenge TBs has for you, is exactly this!
Reverse and build your own digital reproduction from the 9392 main model, based on the product pictures available below.

As an attempt to innovate, this time we decided to allow submissions made in any of the most common CAD tools in use by the FOLs, for LEGO models (LDraw/MLCadLDD and SR 3D Builder). 

Of course you may need to download and install any of these tools and some advices given earlier regarding LDraw, may apply.
Specially make sure you use the latest parts library available for the tool you're using. Otherwise it may affect the ranking of your participation.

As for every contest, there must be some rules defined, that will help us later to determine who's the contest winner, so read them carefully.

Challenge Goal:
  • Reverse engineer and reproduce a digital model, from the Challenge proposed LEGO Technic set.
  • The reproduction should be exact (model complete assembly, parts list, colors and positioning).

Challenge Participation Rules:
  • Every contestant should submit his participation in the form of one single digital file, compatible with the latest version of one of the tools allowed in this contest (at contestant choice) - LDR, MPD, LXF or L3B.
    Hierarchical organization into sub-models is also allowed, for the tools supporting this.
  • The contestants are allowed to enter one single submission only (always the first one submitted).
  • Each contest submission must include one single model only.
  • Contestants must also include one render image from their model, with a minimum resolution of 800x600 pixels.
    It would be great if you have skills for photo-realistic rendering, but not considered as criteria for the purpose of this contest evaluation.
  • Any eventual special elements in the model must be reproduced accordingly (e.g. flexible parts, shock absorbers, etc...). Reproduction should be as close as possible to the original.
  • All the submissions must be sent via e-mail, to the TBs mailbox setup for the purpose of this challenge, with indication of the applicant identification (full name and nickname if applicable), postal* and e-mail addresses.

    TBs TechREVERSE Challenge mailbox: challenge[at]

Classification Criteria:
  • The winning participation will be the first submission sent, that exactly matches the LEGO official model being reproduced: model complete assembly, parts color, parts positioning and parts list.
  • If none of the submissions fill all the criteria above, it will be selected the first submitted model, that gets closer to the original, based the total mismatches counted.
  • Unlike in the previous editions, we will now introduce differentiated weights for each type of mismatch as a measure to differentiate the mismatches severity and increase the evaluation fairness.
    Each mismatch will sum a certain number of negative points (penalties) per occurrence, based on the respective mismatch type. The participation with less penalties wins.

    Below the penalties per mismatch type:
    -3 points, Missing parts or subparts.
    -3 points, Wrong parts or subparts (includes friction/frictionless differences).
    -3 points, Extra parts or subparts.
    -3 points, Parts or subparts misplacement (deviation and/or orientation).
    -3 points, Wrong color used for a part or subpart (if element visible at some of the pictures available).
    -2 point, Wrong color used for a part or subpart (if not visible from any of the pictures available).
    -1 point, Every other eventual situation not covered above (e.g.: wrong spring strength, significant routing deviation from the original on flexible elements, etc.).
  • Classification may not go through all the mismatches until the last one, once the amount gets too high and it gets clear the participation won't get among the first five.

  • All the submissions must be sent to the mailbox above indicated, in the next two weeks. Thus before the 1st of December 2011, 16:00 CET**.
  • The organization reserves the right to extend the submission period, if there is a reasonable justification.
  • Final results are expected to be published by the beginning of January 2012 (exact date may vary depending on the amount of submissions to the contest).


  • The Challenge winner will be awarded with one set sponsored by the LEGO Technic product line and signed by the respective LEGO Designer.
  • There will be also extra prizes for the 2nd and up to the 5th place.

And here they are. 

1st place - 9395 Pick-Up Tow Truck + One licence for 'SR 3D Builder with Animation Console' ***

2nd place - 9394 Jet Plane

3rd to 5th places - 9392 Quad Bike

  • In the event of any eventual leak with further official details about this model, during the contest submission period, it may become a justification to close the submissions period anytime earlier.
  • Any eventual issues not foreseen in the contest rules, shall be evaluated and decided by the TBs editors.
  • The organization reserves the right to cancel the contest at anytime, if participation quality levels are not getting satisfactory.

Take part in the fun!
And do not forget... these unique prizes can become yours.

*) Rest assured your private data won't be published, or used for any other purpose other than this contest.
**) Use the link provided, to find the correspondent local time at your own Time Zone.
***) With 1 year downloadable upgrades, extendable to two years under subject to the offer terms. Read full details here.

Updated with additional item for the 1st prize, as described originally in this post.

Last Update: 2011.Nov.18 20:05 CET


Luc2000 said...

Cool, LDD is allowed :D
The model itself seems more difficult than last years, but since I practised some more with LDD, I think it's doable. Nice prizes, too!

Krika99 said...

I'm doing my modelling right now, but I have a question: If some of the parts do not exist in the program, are we allowed to omit those pieces (but specifying it, of course) in the final model?

TechnicBRICKs said...


I remember that at least sometime ago, LDD had a LEGO Universe Mode, which opens a lot of otherwise inaccessible parts.
It should be what you need.
Please report otherwise.

As for SR3D, think it uses LDraw pats library.

Don't forget to keep your LDraw parts library updated or look at unofficial parts library for new parts still not released.

Alex Campos said...

Good luck to everyone!

On one hand, I'm sad that I can't participate; on the other, I'm glad because I wouldn't have time anyway. ;)

TechnicBRICKs said...


Why can't you participate?
None of the TBs bloggers have insight about how the model was built.
Even me at the moment! The only thing I know, is the number of parts the model uses.

Nevertheless I won't participate as usual, as I'm the one who will evaluate the submissions.
This way I can avoid any potential conflict of interests.

Alex Campos said...

That's also because of conflict of interests why I don't participate. That and, as I mentioned, lack of time. ;)

Krika99 said...

Yes, I am currently using Lego Universe mode, however even that does not have the full parts library that I need, like the new type 16z gear, chains, and A-arms and front wheel-coupling parts, as well as others. If No other solutions exist, can I be allowed explicitly point out any parts to be placeholders for another piece (with bricklink or peeron)?

Alex Campos said...

I think LDD allows you to export to LDraw. You can build the bulk of the model on LDD, then finish it on LDraw with the missing parts.

TechnicBRICKs said...


Then you can try the suggestion left by Alexandre, or SR3D.
Placeholders are not allowed.

Old and new 16z gear won't be differentiated for the purpose of this contest. They're both versions of the same part.

Luc2000 said...

And... done!
Quite happy with the result, although the rear was difficult.

TechnicBRICKs said...


But have you submitted or are you still finishing something.
Didn't notice any submission today.

CHM said...

I was interested in having a go at this competition, albeit a few months after the main event has been and gone. But I can't find the pictures anywhere! What is the big secret with old competitions?

TechnicBRICKs said...


There was a problem with TBs domain in the past 2 or 3 days, where many of our images are hosted, that I realized only yesterday.
It was fixed immediately after contacting my service provider today, so I guess you should be able to access the content by now.

Thanks for your interest and for let me know. :)

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