steph77

👍

A BIG thanks to all of you who voted for my build in this contest! See you soon...

Thanks for organizing this compétition @Milan and @Jim. Congratulation to the winner too! s.

Yep.in my memories we got more than 100 voters some times ago....

That's cool. No problems 😊

OK.ok. never thought so far . But you are right. This system could give an advantage if a specific people decide to not voting. But honestly I personally don't care about that. I let the moderators think a this aspects ...

This could work. Thanks. But what interested me is that the @ArtemyZotov looks like it iis never seen before.

Hope it does ;)

Has voted! Lots of cool entries here. S.

Top! I founded what I was looking for. I didn't knew about these live videos. Back to the subject. The stepper doesn't look that compact and I am not sure it can shift up and down. Need to build it to test but I doubt it. I'll see. For now, thanks for the info @Sokolov Edward. S.

@ArtemyZotov I know for the replacement part for the orange Wave selector. This was not my point. My question is related to the working mechanism of the lever that command the stepper mechanism. Particulary how the 90 degree rotation is obtained. Could you post a picture of this part of the build ?

Thanks @Anto I am glad you spotted the clean aspect of the build wich is a very important thing for me when building a model. Thanks! yes the introduction of pneumatics to the model during the build gave a strong impulsion into the building process. Clearly the best way to route power through a model without compromising on the look nor functionalities. @+++

Cool model. Looks like container trucks are popular these time.

Speaking of the mazda. Have someone info on how the shifter is build? Looks reliable and compact. I am interrested in this design to bring it into my 911

Poor of me who was thinking that architects were the only people working by night Joke appart. I also have this feeling that lego mocs are better build once sun is down. Good work my friend

Thanks for your kind words. I'll have à look at this container fenders

Fire department all road / off road truck - 6-wheel drive- 2 front-wheel steering- Suspension on each axle via floating axles and panhardt bar- Opening hood and doors- Steering via HOH, rack-and-pinion transmission- Pneumatic function for unloading arm lifting- Pneumatic function for lifting mode selection. Choice between hooklift and dumper- Pneumatic locking function for container-gripping hook- Container with wheels and opening doors vid: Link to the Topic

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Hello everyone, Here's the final result of this contest. Although my work took a lot of time, I managed to advance and optimize the model. The truck is equipped as follows: - 6-wheel drive - 2 front-wheel steering - Suspension on each axle via floating axles and panhardt bar - Opening hood and doors - Steering via HOH, rack-and-pinion transmission - Pneumatic function for unloading arm lifting - Pneumatic function for lifting mode selection. Choice between hooklift and dumper - Pneumatic locking function for container-gripping hook - Container with wheels and opening doors Main photo for the competition : Some general photos: From a design point of view, I opted for a 6-wheel truck, as required by the competition rules. Rather than a classic European-style truck with the cab overhanging the front axle, I opted for a long-nosed model. This allowed me to create an attractive opening hood, revealing a functional engine based on new parts introduced with the Kawazaki H2R. Although the model could initially be fitted with two types of wheel, it is now perfectly optimized for the wheel format imposed by the regulations. The mudguards have been adjusted and tightened as close as possible to the wheels, taking into account the very wide suspension travel. At no point does a wheel touch a fixed part of the chassis, even when torturing the model... The red color is a personal choice, the truck being imagined as a support truck for forest fire-fighting operations. It's easy to imagine this truck making rotations with equipment that it unloads using containers. The color of the container comes from the fact that I had to buy the John Deere skidder set to complete the model. Why not, I thought, as it gives an accent that clearly distinguishes the load-bearing chassis from the container. From a technical point of view: The front axle is driven and steered. It floats and is held to the chassis by three ball joints and a Panhard-type stabilizer bar. The differential is held in a reconstituted frame, which ensures that the axles are held in place and remain stable. The rear axles are made of two bogies linked by a mini-turntable, and are also floating. 4 ball-and-socket joints provide support and vertical movement, while 2 rubber pins on the front beams prevent excessive movement. At the rear of the bogies is another Panhard bar. The suspension system works like a charm and is one of the model's major assets. As far as pneumatic functions are concerned, I've chosen to stick with a manual model. As the model is not motorized, I chose to make a 100% manual model. Very playable and featuring an optimized gaming experience. There are three pneumatic switches, each controlling a single actuator. The main switch activates the lifting cylinder. This, together with a virtual pivot point, gives the lifting arm a stroke of almost 180 degrees. It's strong enough to lift the container effortlessly. The second switch selects the lifting mode. In Hook lift mode, the mini-cylinder located at the very base of the arm pushes a connecting rod which holds the first section glued to the chassis. When the main cylinder is activated, the second section pivots. In dumper mode, the mini-cylinder frees the first section from the frame, while holding it to the second section. When the main cylinder is actuated, the arm is raised, this time articulated at the abutment, enabling the dumper to be lifted. The third pneumatic function focuses on locking the lifting hook. This function wasn't originally planned, but as I tested the model, it soon became clear that making a reliable hook would prove very complicated, at the cost of a thick, complicated design. So I opted for this more elegant solution. The downside was that pneumatic piping had to be guided to the actuator, respecting the curvature of the arm in each mode. In the end, the technical design looks very credible. When it came to the final development of the model, there were some major improvements, though not very visible from the outside. I quickly identified a kind of resistance to forward movement when I pushed the model to make it roll. Initially, I looked at the front axle. I imagined there was a geometry problem. I stabilized the steering, and installed reinforcements from underneath (visible on the WIP photos). Nothing helped. I then proceeded more analytically. I successively disconnected the drive chain until I found where it was sticking. The source of friction, though predictable, was at the intersection of the steering and propulsion axes. When the steering was actuated, a slight pressure was transmitted to the drive shaft. As the rotation from the differentials was highly speeded up, this friction was sufficient to cause the problem. I therefore simplified and reduced the gear ratio so that the dummy motor axle rotates at +/- the same speed as the differentials. The force induced on this axle was therefore stronger (more torque) and the problem was solved. As a result, I was able to remove the various reinforcements I'd installed and return to a clear, clean construction. Just goes to show... The video: So much for this project. I hope you like it! Have a good competition!

Hello, Great start. IMHO, the 4 speeds gearbox is a bit too much, but the rest of the build looks pretty well build. Serious entry so far. S.

love this one. I particulary appreciate the originality of the concept. And this driver...God, i need to build my own. S.

Sorry to be late at party. Interresting way to switch between 'one central cylindre concept' to '2 lateral cylindres concept'. I understand how difficult this was, as i do the reverse ingeniering of it I also find interresting the dumsterlock, but i do not understand how it will work. At least, don't forget that there is a limitation off 6 wheels max. You got 8 of them

Thanks. The size of the cab is a subject I still have some research to do. You are right. About the progress. I didn't say that the model is finished . It is the result of the holidays 'rush a I had only two weeks of break. I took some pictures during the build as reminder in case the mod I was planning didn' worked. Here they are: The design process began with the chassis. At each stage both tires were used. As show on the pictures.Next I developed the model from the front hood to the rear S.

I changed from mechanical cyli der to pneumatics for this reason. I found it works better. If not the system work quiet well if the container is reasonable sized. If you actualize the actual design of your arm I could test it and maybe find some idea. S. It works actually very well and I don't think to motorized it. But I'll keep this idea in mind. Thanks Igor 😊