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First if all I totally forgot to post this model here on the forum, guess better late than never Now to explain a bit about the motives behind this model before I go into specific details. Counter on my youtube channel was nearing 10.000 so I wanted to make something trully special. I was not sure what kind of a model I want to make, a sportscar, offroader, construction machine, so the decision came to MAKE ALL AT ONCE. The model would also incoporate ideas from the last decade of Lego technic product to go along with my 10 years on youtube. Starting with the design, the front end is heavily inspired by 42083 and 41999. Notice the front wheels are from 42056. The first motorized function is adjustable front suspension inspired by 8297: The front end can raise by 3 centiemetrs to allow the model to negotiate rough terrain. Continuing towards the cab, which was inspired by 41999, we can pop up the hood to find a green colored 10 cylinder engine inspred by 42030: Cab doors are inspired by the doors from 42069, which open at the angle. Opening the doors you can find a full interrior with two adjustable seats andworking steering wheel: In the center of the cab there is a gearbox which movel lineary to switch between 3+R gears using a special mechanism. This emchanisem translates the sliding action into usable inputs for the gearbox: Going further back, there is a section holding the battery box and, orange lever and utensils on the left side. I will explain the function of the orange lever later. On the opposite, right side there are 2 M motors powering all the motorized functions. Notice the mysterious red lever which is used for switching motorized functions. Notice the pump used to power the pneumatic functions. There are also two electric switches to reverse the two driving M motors. If we continue towards the back, we can see there is a pair of linear actuators used to manipulate the container. The red lever switches power from one of the M motor between the adjustable front suspension and linear actuators. But not only can the linear actuators tilt the container, but they can also pick up and load the entire thing. To switch between tilting or picking up, the orange lever is used to lock the individual segments of the lifting arm. This function is inspired by 8052. The arm can reach out and pick up the container with ease: If we continue and look at the photo of the back side you may notice a PTO output along with a strange mechanism with rubber bands: Same motor that powers adjustable front suspension, linear actuators also powers the PTO output via 24 tooth clutch gear. Notice that the PTO output uses a CV joint in order to slide the axles into it without friction. The rubber band mechanism is used to hold the rear attachment. This was inspired by 8110 and 42054. Here is a sum up the functions of the model so far: 1. Motorized functions Adjustable font suspension Tilting of the container Picking up and lifting of the container Pneumatic compressor and storage provided by two air tanks powered rear PTO 2. Manual functions: 10 cylinder engine powered via rear wheels through a 3+R gearbox 3+R gearbox Steering controlled by steering wheels inside the cab AND the light on the right side of the roof Openable doors Openable hood Adjutstable seats Independent front suspension Solid live axle assembly in the rear - inspired by 42043 Features: Both front axles are at a positive cats angle, allwing the fat Porsche wheels to self-center Due to the immense weight, each rear solid axle is supported by 4 yellow very hard springs The 3+R gearbox is derived from my diagonal gearbox featured in the Dominator TRS Due to its framed design the gearbox provides a very rigid backbone to the model A 5 tubed exhaust seemed appropriate for the 10 cylinder engine I hope this photo helps you understand all the functions and features a bit better. Each color of the model's chassis represents a different module. Next we will look at the rear attachment built for this model. The attachment is multifunctional, combining linear actuators, pneumatics and 4-way switchbox to actuate all the functions: In total the attachemnt features following functions powered by a PTO via 4-way switchbox: Extension of the control arms via small actuators and a lever mechanism Lowering of the control arms via large actuators - inspried by 42009 Rotation of the arm Spooling up a winch which allows the arm to be used as a crane arm - inspired by 8258 Additionally there are 4 pneumatic function powered by the compressor and air stored in the two pneumatic tanks on the truck itself: Raising of the primary arm joint Raising of the secondary arm joint Tilting of the showel - inspired by 8043 Closure of the blue pneumatic claws - inspired by 8110 Some intersting facts about this attachment module: All of the penumatic functions + rope of the winch pass through the turntable. Rotation of the turntable is limited to some 350 degrees to avoid all those tubes and rope tangling up The structure of the arm with diagonal arms is inspired by crane arms Frictionless 8 tooth gears allow the white 16L axles to slide with ease while powering the two large actuators used for support legs The 4-way switchbox is one of my most complex and sense assemblies and it took me 2 days to design with support of LDD. Winch uses a friction pin to keep the rope from unloading when the winch function is off. The blue claw uses rubber bricks for better grip Combining the main model with the atatchment resluts in a model which weighs around 5 kilograms and is over a meter long! Some facts about the design, and build of the model: The whole model took me over 2 months to design and built, biggest challenging being the gearbox, container arm and rear attachment switchbox. A lot of care was placed into keeping all the functions working reliably with a limited power source (M motor) and safely with no gears skipping or breaking. The model uses around 16 universal and 3 CV joints to transfer the power to the suspension lifting mechanism, PTO, both steering sytsems and drive axles. Each rear axle is capable of supporting the whole model's weight, the weak point are the Power Puller tyres which sag quite a lot, especially on the third axle. Thanks to it's stiff gearbox, this model has one of the stiffest central frames I ever built allowing the model to be easily picked up by diagonal front and rear wheel without excessive flex. Gas canisters and first aid from 42069 are featured on this model The hood ornament is a bunny from a Lego Friends set This is my first model to use the white pneumatic air tanks for it's intended purpose. The model is covered with glow in the dark parts close to its edges, so its visible at night - useful when you are wandering around your building area at night A photo of the mashup's total of 8 glow in the dark bionicle claw/eye pieces: You can see the model in action in the following feature video: Finally I would like to thank you for reading through this massive post and for helping me reach 10.000 subscribers.
G'day all. I have over the years done a couple of alternate models and attempted to make instructions for them, some better than others. All of them can be downloaded here or from my mocpages signature link below but I'll add an individual link with each one. My first attempt was a bulldozer from set 8043 quite some time ago. Argof made a topic here about it and I just stumbled upon an old bad quality vid and this is it. Instructions: Freespace or Bricksafe I was driving Hooklift trucks for a while and the Lego set 8052 came out so I had to RC one version and a full RC overkill another. This one I over did but didn't make instructions for it. I added an extra exhaust for duals to the instructions. Instructions are done by LDD here or the lxf is attached. So being a truck freak person I pulled out an old set 5580 Highway rig and jammed in an XL and M motor to RC it but keeping it looking as close to the original as possible. Instructions: Dropbox or Bricksafe. Next one is an alternate model of the set 8297 into a tow truck. I put he M motor on top of the fake V8 to look like a supercharger but its gear driven to the winch and bypasses the V8. Instructions: Freespace or Bricksafe I got the lego set 9398 and turned it into an RC quadbike. nato8181 (Renato) made a topic here on Eurobrics about it. Instructions: Freespace or Bricksafe My next was for a competition here (a while ago) and I used the Lego set 9394 jet plane and turned it into a helicopter. Here is the thread for it. The goal was to have a pull and release trigger to spin the rotars and still have them to be able to spin freely. Instructions: Bricksafe This one I did for fun, I call it the lowrider logger. The idea was to make two versions of logging trucks from one set and no motors. The first was a truck and dog, the second was a folding B double with a loader. A model B model Instructions: Bricksafe 8052 RC.lxf
Hello! I am currently working on heavy MOD of 8297, I have sucessfully changed the front part of the model including a gearbox run by M motor, so the model has motorized winch and second output (probably for door lift), as well as servo for steering. I didn't had problem with adding XL for propulsion. I am keeping the original suspension of 8297-B and RWD layout because I am too lazy to invent my own :D The XL propulsion output goes to 20T-reduced to 12T, then again 12T and back to 20T and then standard 3L diff. I think it's enough reduction for XL... But now I have noticed a glitch... when standing without pressure on suspension, the yellow shock absorbers push to the steering arm (part 57515) so much, that it generates too much friction between steering arm and CV joint (part 32494), making one wheel turn slower and sometimes almost stop. This happens also when I pick it up in the air - one wheel turns (the one in the "gear" side of differential). If i slow down the fast spinning wheel, then the other that was slow, start to spin faster as if there was no problem. Also, if I apply pressure to shock absorber, so the CV joint and universal joint go straight to the differential (instead of being in angle), the friction is less and speed of both wheels becomes somewhat similar. Here's two pics of rear suspension from underside, that might help to undersand: http://www.brickshel.../dsc_2139-2.jpg and http://www.brickshel...-B/dsc_2137.jpg As I thought that this is due to the pressure shock absorber is creating towards the steering arm, I lifted the shock absorber one stud higher, so the angle is wider and accordingly, lower pressure (ofc, it made the chassis flat instead of the lifted rear as with 8297 B). But the problem still exist. With current setup I noticed, that when driving or checking wheelspin while they are lifted in air, they turn fine when "driving" backwards, but loose sinergy and start driving with gear crack sound, when "driving" forward. So the question is - can this be "cured" keeping the 8297 rear suspension setup, maybe by replacing a part (differential?) that might be faulty? Or this is going to happen anyways (some natural situation with XL)? I had the nasty sound of slipping gear crack with my previous MOD - 9395, but in the end, I managed to make a drivetrain, that doesn't crack (http://www.brickshel...V2/dsc_0487.jpg) . Now I hope to get an advice, as I don't have experience with XL motors, as well as suspended axles, and maybe I am doing something totally wrong... thanks! Lauris
Hi EB members, I'm LEGO fan since early 90s and have came back from my Dark age recently with 8297 set. I like it because of nice technical-mechanical base (independent suspension, fake motor connected to back wheels, differentials) this model has. I know this model is now old and most of you aren't interested in it but I'm actually it process of modification with more features (didn't see such mod before). I still have several Technic and Model Team sets from before the Dark age time, however these were before studless era came in, so 8297 was pretty new and fun to build. I've continued on my new collection with 9398 Crawler which has nice PF features and 8475 with Radio control and buggy motors Since I was a kid at the time I started my LEGO collection I couldn't afford any of big sets, especially Technic ones, so I hope I could get those 8880, 8466 and others later As you may see my recent sets having new features I didn't have before. One thing I believe I'm missing - pneumatics. This is very new and unknown to me and I'd like to explore this LEGO feature too. I wish you guys to suggest me the best set to get acquainted with pneumatics and enjoy it. There are two sets I found and interested: 8462 Tow Truck (1998 year set) 8110 Unimog - prices decreased so it is possible find a good deal on MISB set, not sure if it has cool pneumatic features. Any ideas are welcome.