Sunday, September 21, 2014

Week TechVideo, 2014 #38 - Han's new 2014 model (Dragline Crawler Crane)

Han Crielaard (Designer-Han) is a seasonal builder who uses to present us a new large model of his creation, roughly every year.

2014 brings us a Dragline Crawler Crane, made in a very nice and unusual color scheme (green + orange).
It has a very realistic appearance, either from from aesthetic or functions point of view.

A large number of PF elements were used in this model to assure all the functions are motorized and remotely controlled.

  • 5x PF M-motors
    • 2 motors for Swing
    • 1 motor to Lift/Lower the boom
    • 2 motors for decoupling the drums - Free fall mechanism

  • 2x PF L-motors (Crawl)
  • 2x PF XL-motors (Wind/Unwind two drum winches)
  • 4x IR-Receivers (2 motors being connected to the same output)
  • 2x PF Battery Boxes (1x Rechargeable; 1x AA cells)

This includes many features and main characteristics are:
  • Length for transport, only A-frame + boom foot: 65cm
  • Height superstructure: 18cm
  • Width undercarriage: 21cm
  • Length boom (3 sections): 92cm
  • Height with raised boom (3 sections): 98cm
  • Boom angle range: -10 till 80 degrees
  • Weight: 2,7Kg (including 2 battery boxes)
  • Lifting capability:
    • 250g (save range for full PF operations)
    • Max 500g (heavy stress on PF operations) 
  • Total number of parts: tba

Among all the features more or less expected to be present in such kind of machine, the one that most impressed me was the "Free Fall" mechanism whereof the drum winches are temporary released from their motors.which was the main requirement for this model to act as a real Dragline (you can see it in action from the video above).

For more detailed explanations about the model, its functions and development phases, you may read it all, at Han's website.

And if you're eager for the usual building instructions prepared by Han, 1Q2015 doesn't seem too far!


Please avoid sending requests to post specific models on this TBs section.

We understand some of you would enjoy to see your creations featured here, but please understand that because only one video gets highlighted per week, it is impossible to accommodate all the great MOCs continuously build by the Technic builders out there. They simply won't fit all and that's also not the purpose of this blog (see the header statement).

Many of your MOCs are scanned anyway and listed for later publication when they do not fit immediately. However some remain in the backlog queue just for too long and eventually loose the relevance or the publication opportunity window. As a rule of thumb, we also avoid publishing MOCs that have been featured by their authors or other fans at some other great web places dedicated to the Technic community out there. It doesn't mean that occasionally some won't get published here anyway.

Thanks for your understanding!

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