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All Terrain Crane
Based loosely on the Demag AC50-1 and a model that was created some time ago by Jennifer Clark (http://www.genuinemodels.com/demag_crane.htm) I re-designed this model from the bottom up and have also updated its looks a little
About this creation
Chassis Features
- Drive from all six wheels to power the six cylinder Technic engine
- Six wheel steering, select between standard and crab steering
- Un-sprung Pendular suspension for all axles with option to lock front and rear axle
- 9v motor with selector to lower/raise outriggers or rotate superstructure
- Opening cab doors

Superstructure Features
- 9v motor to raise/lower boom
- 9v motor to extend boom
- 9v motor to wind cable






The boom functions are achieved by using some custom parts which is not ideal. For both boom luffing and telescoping I have used 4mm threaded screw integrated with Technic axle joiners.




I am happy with the functionality of the model, although it has some areas which could be improved. Due to the weight the steering is too heavy, there is also the problem that the wheels need to be absolutely perfectly lined up when selecting between standard and crab steering. I would have like to have sprung the suspension as in the current set up it is necessary to lock either the front or rear suspension (or both).

Reference (http://www.genuinemodels.com/demag_crane.htm)

Normal Steer


Crab Steer


Outriggers Extended


Boom Lift


Boom Raised


Boom Raised and Extended


Boom Lowered and Extended


Cab (Showing Steering Selector)


Cab Door and Interior


Suspension Switches


Back Box Open


Chassis Top View


Chassis Bottom View


Deck


Gear Systems Rear View


Gear Systems Front View


Superstructure (Showing Rollers to Aid Turning)





Comments

 I like it 
  May 18, 2014
fab build looks great and very playable well done
 I made it 
  January 5, 2012
Cheers, I have added some more pictures of the real thing now.
Quoting Ben 289 This is the best crane I've seen build in lego. I would like some more details in the technical department. 5/5
 I like it 
  December 30, 2011
Awesome! Very nice rebuild of Jennifer Clark's famous crane. You optimized it very ingeniously. This deserves much more good ratings in my eyes.
 I like it 
  December 30, 2011
Wow that is a impressive amount of gearwheels in that system!!!
 I like it 
  December 26, 2011
ravishingly beautiful!
 I like it 
  December 26, 2011
This is the best crane I've seen build in lego. I would like some more details in the technical department. 5/5
 
By Paul vdB
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Added December 23, 2011
 You are at the beginning of this folder. Compact Sequential Gearbox (5 speed +N +R)
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