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Showing results for tags 'Christie suspension'.
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MOC The Red Pitbull Terrier
MajklSpajkl posted a topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
Hi! It's been quite a while since I managed to put something together and even longer since I managed to put it "on paper". I'd like to present you my latest, and already an old MOC, may it rest in pieces, The Red Pitbull Terrier! At first, this one was supposed to be my noble steed for the unfortunately canceled winter trial truck (kinda) competition organised by our national LUG. Stressed out due cancelation, this horsey grew bigger and fatter than it was ment to be for the actual race. I admit, it is rather fugly, but it was a lot of fun to build and drive also. I am especially happy about how did the suspension come out - the tracks adapt(ed) to the surface very smoothly and there is no bending of the road wheels towards the outside. Thanks to our EB colleague Kelkschiz and his I learned, that what I've built is called a Christie tank suspension . As a keen eye will certainly notice, I used the small shock absorbers with normal springs. Only when I put the cab on, I learned that the front road wheels had to be suspended on hard springs, because the weight of the cabin was pulling the whole truck's front down. My intention was, to build the tracks like a module with spring inside this module, which would then be attached to the hull. After several trial and error iterations, I abandoned that idea, because I didn't manage to eleminate the bending of the road wheels towards the sides of the truck. I ended up attaching each road wheel one after another, kinda like stitching and prepared me quite some "fun" for disassembly As for the hull, I thought I managed to seal the bottom and the sides of it quite well, but that damn half melted snow reached every dark corner of that ogre anyway! As you can see on the photo below, I decided that this puppy should run on four PF XL motors, with all sprocket wheels driven. The motors were geared down just a bit (12/20 -> 1/1.67). I really recommend those "new" wheel hubs for mounting the sprocket wheels - they hold as Kragle and I don't recall the tracks ever slipping of them, as it seems it often happens when sprocket wheels are mounted on axles only, as they tend to bend. As you can see, I built some kind of a gutter for the tracks , so that no return wheels were needed. That two stud wide gutter in combination with the mudguards also kept the tracks tucked in nice, preventing them to slip off. Some transversal girders were also used to make both sides of the suspension sturdier. A nice, warm pit remained in the center of the hull for two AAA battery boxes. Two sets of 63 tracks were used. The motors were connected in pairs, each pair to its own V2 IR receiver. The receivers were placed under the hood of the cab, therefore a fake cooling fan. Although the tracks tend to slip, I decided not to mount any transversal ribs on them and went for a tight fit with the muguards. So here it is, with some accessories to make it look badass - at least that was my intention . Final dimensions are approximately W/L/H = 48/25/26 studs. Weight: 2.3 kilos. Two sets of PF LED lights were used, each powered by one of the BB's, so they were lit all the time. I tried to make the cab look a bit like the older tracked trucks that goooooogle provided me with. I had those transclear dome pieces for a while so I tried them out as a bulb for the lights. I still can't say whether I like the outcome or not. Can someone please explain why would somebody need turn signals in the middle of Syberia??? I sure can't say :laugh: ! The cab was somewhat fun to build because it starts with even width and ends with odd. Lately I really like Technic creations to be manned, so there are my three brave soldiers, kicking winter and bora in the face! I hope you like it, otherwise feel free to rip me apart P.S.: Yes, there is . I was, again, foolish enough to edit the video along with music that is under copyright, so the actual music you'll be hearing is just barely coherent with the cuts... I recommend listening to the "original" music which should be in the video, but it got shot down due forementioned world of legal stuff etc... I provided the link at the begining of the video. I must also add, that this baby was named after that song...I hope this little naivity of mine won't degrade your opinion on this build.Cheers, miha P.P.S.: I hope my "hero-doesn't-go-pro" didn't make any of you sick because of all the shaking... My fair lady provided me her LG G3, which I abused on this torture tool Thx baby.