Construction report
Liebherr LR1750
Introduction
Finally after a long search for drawings and information of the Liebherr LR 1750, Wouter and I started drawing the crane in September 2011. The intention is to build the crane in scale 1: 14.5 and to make it fully functional, so that it can be operated by radio.
The aim is to be able to approximate the lifting table to scale, for this the crane would have to be equipped with more than 200 kg of ballast (crane ballast and superlift ballast together). I hope that we can complete the drawing work in one year, as soon as the weight of the various parts is known, we can determine the force on the undercarriage and calculate the delays and engines. The biggest challenge will be getting rid of the drive in the tracks.
The reason for building the crane in scale 1: 14.5 has to do with the scale of the vehicles of other members within our modeling club. In the near future I hope to be able to persuade a number of members to build semi low-loaders in order to get the various crane parts transported on the MBVP model construction track. can unload and assemble trucks.
Our LTM 1400's will also be operational by then so that we can unload the parts from the trucks and assemble the crawler crane.
In the meantime I have been able to take a lot of pictures myself, but I have also received many from other crane enthusiasts.
But if there are still people who have detailed photos of an LR 1750 or LG 1750, I would be more than happy to recommend any help, especially parts during transport.
The tricky part is that the cranes are very often on a refinery, so you cannot get close or that photography is not allowed. And because they are relatively expensive cranes, they never stay in the same place for long, you often get information too late where a crane is being built or a lifting job is being done.
Technical details:
| Dimensions of the scale model | Dimensions of the real crane | |
|---|---|---|
| Length tracks | 820mm | 11.900mm |
| Width crane | 710mm | 10.300mm |
| Central ballast | max. 31kg | Max. 95 ton |
| Counterweight superstructure | max. 80kg | max. 245 ton |
| Superlift ballast | max. 131kg | max. 400 ton |
| Length S-boom | max. 6517mm | max. 94.5 mtr. |
| Length D-boom | 2172mm | 31.5 mtr. |
| Length fly jib | max. 7241mm | max. 105 mtr. |
| Weight of the crane | +/-400kg | +/- 1.175.000 kg |
I regularly post updates with more information and pictures of the project on the Bouwmachineforum.
January 2012:
The drawing work for the S-boom is almost completed, the D-boom still has to draw the main piece. I am now working on the final drawing on the jib, which I would like to have completed before the end of January. Then I start drawing on both sprinkles.
August 2012:
Almost the entire boom has now been drawn, except for one 3-meter section, the main boom is complete. The photo also shows the full jib. The real boom without a 3-meter piece is 91 meters, converted to 6,275 meters. According to the calculations, the weight of the boom sections with the chosen materials also comes out to scale.
The jib is actually 105 meters long, and that is 7,241 meters to scale. This results in a tip height of 13,516 meters to scale.
January 2013:
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December 2013:
At the beginning of December I placed the order for the laser cutting of the first parts for the superstructure. During the Christmas holidays I started putting together the first parts.
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