Well, this basically came about when I noticed that the Hose Reel (2585) has lugs through the centre to take a technic axle. I had 4 of them, and so it all just came together...
The crawler is built entirely with studless beams & pins, something else I've been experimenting with lately. Here's some pictures:
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| The crawler from above. You can see the bent beams attaching to the turntable, and the side-plates, which are not structural elements. || With side-plate removed, you can see the small runners for the crawler tracks. || From below, you can see some of the studless beams used in the crawler. |
| || The various functions are provided using the 4 cable spools (hose reels). In this picture, the A-frame has been removed, so you can see them clearly. They are controlled by the removable wheels, two on each side. A technic axle goes through the spool, with an axle joiner (6538) attached. The external wheels slide in & out the other end of the axle joiner. This makes turning the spools much easier! |
| || Here's a view without the spool wheels. You can see the attachments for the main boom & super-lift derrick on the left, along with the 2 hooks, while the lowered A-frame is on the right. The two 1x6 beams on the bottom right are for connecting the super-lift counterweight. |
| || Here's a shot of all the pieces of the boom, super-lift derrick, etc. Also the super-lift counterweight on the right, with the fixed jib attachment to it's left. |
| || The super-lift counterweight is supported by 4 individually steerable sets of wheels. One beam attaches it to the main crane base, another attaches to the super-lift derrick. |
| || || A couple of shots of the crane base before assembly. |
| || || A couple of shots of the driver in his cabin. Due to limited space, the seat had to be offset 1/2 stud both forward & sideways. The second shot also shows the standard boom configuration. |
The crane is very versatile, and can be used in several configurations:
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The standard configuration for average lifts, with standard length boom.
For lifts requiring extra horizontal distance, just add a fixed jib to the standard boom.
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For higher / heavier lifts, extend the boom, add a super-lift derrick, and extra counterweight.
For even more versatility, extend the boom further, and add a luffing jib.
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| Finally, a shot of the crane being used to lift a large I-beam... || ...and configured for maximum height lift, at approx 145cm. |