THIS IS THE TEST SITE OF EUROBRICKS!
Search the Community
Showing results for tags 'Pressure'.
Found 1 result
-
After I designed an 8x4 chassis, I wanted to try something new when it came to building something to put on it. I wanted to make something with a ton of functions, and I wanted it not to have Power Functions! Seeing all the functions others have previously included in various Tow Trucks (notably Sariel, Dikkie Klijn and Grazi), and the different ways of getting those functions to work, I decided that Tow Truck = lots of interesting functions = a nice challenge! The lack of anything electric here, really reminded me of how Technic Lego used to be when I was young, with manual cranks and pumps and stuff! I really like it this way! Like all my previous MOCs, it is absolutely not based on any particular real life vehicle, but it is in the style of a European type, heavy Recovery Truck. I'm pretty sure some of the particular functions I've implemented doesn't even exist in that iteration in any real life vehicle Anyways, I'll let the pictures do most of the talking, however I will interrupt at occasions to point things out along the way For some "behind the scenes" pictures and some more technical information regarding the functions, please check out my "blog" Will have to wait till tomorrow to make a video, as it is now too dark to make anything good As you can probably see, I borrowed some details from the 8258 cab, and then redesigned it, adding a taller roof, openable doors, a different grille, some slopes for better lines, and a front mounted winch. The cab tilts forward to reveal a V8 engine, driven from the two rear wheels, through a central differential (placed just forward of axle 3) You can also see the front stabilizers. These should be deployed first, as pumping the manual pumps without them, can make even the strongest sailor or truck driver seasick The front winch can be used to recover cars/vehicles that are just slightly stuck on the side of the road. The stabilizers provide.. stability It is driven by turning the grey 12z bevel gear in the front The rear features a similar winch, for the same purpose. It can also be used to tow vehicles, or pull them up onto the towing fork when it is deployed. Here the rear stabilizers also perform the same function as the ones in the front. Between them, the front and rear stabilizers easily lifts the (quite heavy) truck off the ground Yeah, kinda looks like it's going to snap down the middle.. the curse of studless building But it actually is fairly solidly built! The independent suspension works pretty well (then again the truck is quite heavy) The front two axles feature double wishbone suspension, and the rear axles are live (probably not true to life, but good in Lego) The doors open (JUST LIKE IN A REAL LIFE TRUCK!!) And now for the fun stuff The towing fork swivels/yaws, and is lifted and tilted using pneumatics. If you hav crashed another European style truck, and don't want a crane boom through your windshield, it can be extended by 5-6 studs using an old style pneumatic cylinder. It retracts with the help of rubber bands. (Will show better in video later on) As for the crane, if you need to recover someone directly behind you, you can just extend the outriggers and raise it up And the extend the boom Boom extention is not via pneumatics, but rather via a crank mounted on the right hand side of the chassis, just behind the second axle. A system of gears and crossaxles work their way up through the turntable and to the end of the main boom, where there is a worm drive. Did I say turntable? But of course, with the flick of a couple of (pneumatic) switches, you can recover trucks that fell off the side of the road and into a gorge! The slewing of the crane is done with pneumatics, similar to the system on the 8868 Air Tech Claw Rig from the early nineties. Unfortunately this limits the work area to slightly less than 180 degrees to the rear of the truck The outriggers are deployed with.. you guessed it: pneu-matics! And the under belly shot I think this covers it all Two air pumps, one air tank, 8 square bottomed cylinders, 9 rounded bottom cylinders, one long old style cylinder (18 pneumatic cylinders in total), 9 switches, too many T-pieces to count and several meters of pneumatic tubing later, I had to finish it, as I need pieces for the [TRIPLE] challenge! I also made a compressor unit, that will fit in the cabin, if I'm feeling lazy. But the overall goal was to make something PF-less, and I am very happy with the result! Video:
