steph77

Hi, As there is a copter MOC on the forum i must be there :) May i suggest to you to get out with the idea of a C model? It would give you so much more liberty to design the model? About the MOC now, i particulary love the scale of it and it's global proportion. From my experience, there are some attention point you have to fix quickly: 1 - Design of the blades : their wheight will have a considerable impact on the rotor's design and on the final look of it. You can work temporary with similated wheights on the extremities of the rotorhead. This is also helpfull to check the command's efficiency. 2 - Will it be motorize or not (personnaly i would prefer not)? This is important because of displacement of the gravity center of the MOC due to the BB. One of the main issue in helicopter MOC is the fact of to much weight on the rear of the MOC. 3 -Functionalities of the rotor head and linkage to the cockpit that must be integrated from the very begining of the design. Maybe you could be interresed by this design : I will follow your work very closely. This is actually one excellent start point Enjoy your build!

Looking at the crane assembly i am surprised by the use of CV joints in the longitudinal transmission . ...they do not seems to be used in the B model. Anyone has an idea? On the right side of the B model i ask myself the function of the 20T gear. The lower one of the 2 presents on this side...

Trucks at this scale definitely looks awesome and makes 'arocs like' trucks looks a little odd'. I dont see correctly what could be the brickbuild engine. About me, one standard engine or technic mini engine fits perfectly with the scale. Does anyone have a visual for my comprehension? Thanks

I told you it was 49.5/20 tires for the MAC :) Completely in love with the concept of full manual set. and particulary with the two B models of the MAC and Rally car. I have a feeling coming back in th 90' don't you?

...and this is a real Good thing ? what i meant was that your model is another proof that this is a real good scale to build trucks. Again :great job ☺

Cool model. Remind me some of my builds in a same community of scale. Good job on it. Just one little reserve on outriggers bending too much for me....

20: 10 1: 6 10: 4 22: 3 18: 2 9: 1

Thanks all! I do have tried the Claas tires but i needed to take the mudgards by two studs higher than actualy and it give him some disproportionnated look. I'll try to post a picture in this configuration...

Hello, I present here a small agricultural tractor. The origin of this model is simple. It has an educational value. I used the subject to begin explaining to my son the basic principles to achieve his own models. The purpose was therefore to explain to him the following principles: - Steering rack, steering wheel. - How does a pendular axle work? - The U-joint how does it work? - Differential utility, - Realization of a simple transmission, - How to properly cross a transmission axle and a steering shaft, - What is a gearbox? ; simplified application in on / off mode for a function. There were finaly lots off things to explain. And the result is a nice tractor, playable simple to build. Here it is : About the design, we are on a MF235 base or something like that, (it's not really important;) Some other views: The rear linkage is three-point type, the PTO is in the central position, offset from the wheel axle for realizing a transmission axle with the gearbox wich is located under the steering wheel and allows to put the PTO on/off. Closer: The lifting is carried out by means of a simple mini-cylinder controlled by a crank located on the left side of the tractor: The hood is openable, of course, and we have a small engine L3 in direct drive on the differential of the rear wheels: We added some details, such as a pseudo oil gauge: Small zoom on the PTO control, under the steering wheel: The front axle is pendular (thank you to the neighbor who showed it in real life to my son), a view of the driving position, with the high exhaust pipe , in order to not 'Gaz' the farmer :) And finally the traditional view from below or we somewhat sacrificed the possibilities of crossing by installing the mini-actuator, but ...Who cares? In the end this Moc comes back to me rather well, it fulfilled its first role;) What else? Steph.

. Anyway it'a good choice! Just be carefull. This piece is quiet fragile at the articulation point

Thanks! Could be hard to find and be very expensive. I just had mine from the dark age. Personnaly i would preffer @efferman custom part....

Here is a video of the model in action: Enjoy!

The upper part rotation is achieved by one medium motor. Here is the kinematic sequence: M motor/worm gear / clutch / 12T / turntable. Although I have 3 wires passing through the turntable I didn't install specific rotation limiter, but I had better to do so. I'll try to see how I could realize this limitation. Thanks for comments!

It is RC, three IR controller. The IR receptor are installed at the back of the body, one in the left side and two in the right side. The receptor are integrated by the use of the black color for the back part of the structure. The cells are oriented to the top for a maximum quality of reception. Look closely at the first image of the post and search the new curved black panels 3/5 at the back and search inside the curved side on the top, you'll find them ;)

Thanks! I do not based it from a real model. I just make use of my Volvo labeled parts to give an identity to the model :) Honestly I tried to do it. But I failed. My reasoning on this point is the next one: As my treads are only 20 cm long (total length, only 21t between axes) I do not have that much place to insert the drivetrain. Making use of the treat sprockets involve that I had to report to the center on the tracks the point where I could connect the motors. This meant a 5 to 6 T longer tracks witch doesn't match my goal. On the other hand it was possible to pass the drive train directly laterally. It also failed due to much to wide design. So, even if the design impact is real, I decide to use 40T gear and old style treads. This was the best compromise as I immediately obtain a great reduction (40T/12T) and get a good power and couple in the tracks. As the duet 40T/12t is realized with one T of vertical offset, it also fit perfectly with the L motors points of connections Last but not least, the rotation on flat surfaces is much smoother with those 40T gears :) It is one of the few point on witch I made different choice than what is usually the use. Thanks for comments

Here I am again. This time the subject is one of the very usual kind: one PFS IR commanded excavator. They are many exemples of perfect excavator on the web...but I just wanted mine, of my own design. So I study it from A to Z and I had to answer many of the questions that many people answer before.Surprisingly, I do not answer the same at some of them :) But first this is what we are talking about: This model as been design in one only goal : a maximum of fun to play with it. In order to match that goal, each and every motor Is directly connected to each function. No mechanics in there. The function are ultra classical : drive, steer, rotate and the 3 movements of the arm. I make use of L motor for the tracks and lifting main arm. Other are medium size motors. I also choose to keep it as compact as possible. The main issue I find on many creation on the web is a too big body resulting in a too big arm. Too big arm need lots of power and often be very slow to move. I try to get what I think is the best compromise in size and use of existing motors. (No pipa I do not have RC ones :) ) The tracks gives the global scale. As you see the BB is in the lower part of the structure. This is due to compactness of the upper part but also for better design of this last spoken upper part. As the excavator rolls only on flat surfaces, no use of any suspension in it... view from the downside the tracks are well integrated, and even with the BB there is a good ground clearance of 3T wich is very good. I also try to implement good action range at the arm: And also small details that makes it looks good, like 3 sets of lights, toolbox, ... Back view, easy acces to the BB to swictch on/off and replace (often:) ) batteries The top part is designed so replacing M motor by Large one is easy (I do command two of them, awaiting arrival) So here it is, not the Moc of the year for sure, but sometimes it's good to achieve some simple goals. As expected and designed for, this one is very fun to play with. Hope you'll enjoy it Steph.

After seeing the leaked pictures i am 100% sure that the rally car is exactly the same size, wheels an then, by deduction, functionalities than the 42041 B model. According to me it is not a bad thing since this B model is still build actually and played with by my children. The A model was put in pièces after 3days.... I read that you guys want transmitions and suspension on it, but at this scale it is absolutely not a must have.... EDIT: and from memories, the space between front wheel and mudguard doesn't let any doubt on the lack of this feature. For the Mack truck i am not 100% sure but would'nt be surprised if it use the medium size tires and then will not be in the 42043 scale. Just think about how large the b model of this 42043 is. And then think it is a different tractor, MUCH longer, and with a trailer???? no much too big i think. I base my analyse in comparison size between tires and the rack of the outriggers

hello. According to me you have to light it up at max and then you must simplify drastically the transmittion. You ave realy to much gearing in the process. Try to have one solid reduction directly at the output of the motors in order to increase the torque as much as possible and the go in the most direct way to a differential. @+

on IE10 does not work. After having voted impossible to look at the results. The poll dissapeared...

little up just to share the video of this Moc:

ok for me here...

As it was asked for here are two pictures of the pendular suspension system:

hi Jim. I open the topic and vote. it apparently works. but I change topic and come back again. it was asked to me to vote again. I both case when clicking on the show results button, the all system to vote do disappear from my screen...

I have voted . I enter the forum and wasn't log on it. I saw the results. I do log in and the window asking vor vote appeared. I voted but wasn't able to look at the results. You're welcome

Hi eurobrickers This is what we will talking about here: a mini scale semi dump truck based on a Mercedes Arocs 6X4 and a solid tilting bed mounted on one 3 axle trailer. This time I decided to keep it small. My son asked me for something simple this time but fun to play with. So I do. I worked hard on the design of this little set. The smaller it is hardest the design is I found. I am however quiet happy with the end result. From the front view you can see I choose a contrasted color scheme for this truck. Regular blue frame, white cab and black to simulate the plastic covers and accessories of the cab. I place light, traffic signs, rear view mirror, antenna and gyro on the top. All we need to make it look good, as in real life model. The top view show the roof treatment. This part was particularly hard to find. You have a discreet HOG, the security roof trap that opens and two small panels to finish the roof line Viewed from the back you can see I managed a space for the rear window, exhaust pipe, spare wheel and a toolbox. I do not forget the back lighting with one projector but also rear stop and traffic lights. The 5th wheel is a simple pin connection. I found another system (mechanical lock) but it doesn't match perfectly the scale of the model so I decided to remove it. But there is something more about this cab...it tilts and the doors can be opened showing the interior with two seats and steering wheel (not it is not operational ) The complete model is 36X8X11 cm. I am particulary satisfied with the proportion of the whole thing. Rear view of the trailer, same detail attention than for the tractor unit. You can see at first plan the locking system of the bed's door (simple friction pin). And here is the view of the railer once lifted. The mecha is dead simple: one linear actuator in direct link with the HOG place on a real ergonomic place. Few pieces, great playability. The trailer as also a retractable parking support with simple linkage command and lock point to assure it's stability. Here it is: But that's not all. I manage the all wheel one good ground clearance as my son play with it on it's bed (often by night ) and I realized a quiet complex pendular suspention on all axle. The system is based on Pippasseyeyoyo's one developed on his own semi dump truck. I just scale it down a little . Suspention in action. the first axle is rigid on the tractor unit So here it is...do not hesitate to comment it and any good idea to improve it is welcome. Steph.