Lixander

Oke.....so make the suspension arms wider.

Yup. The concept complicates everything as it brings other problems with it. I will see what I can do to improve it. In the next week I will shorten the suspension arms for sure to address the geometry problem. P.S.: The model doesnt have any problem caused by the drive-shafts from what I have seen until now.

I see. I will shorten the suspension arms for sure. Thanks! Also, what do you mean by ”mounts”? P.S.: The model doesnt have any problem caused by the drive-shafts from what I have seen until now.

So basically make the drive-shaft the same length as the suspension arm? Also, on the Flat baja MAXX is hard due to the distance between the arms. The tests version uses 1x CV joint of the new kind on each end connected with a 5.5L axle with center stop.

The chassis of the Flat baja-truck MAXX is near to its first outdoor run! Opposed to the prototype, the version that I am testing has 4x buggy motors, 4x hard 9.5L shocks and 2x hard 6.5L shocks. For the first run at least, I fitted the model with 1.9 in tires for RC trucks which have an outer diameter of around 120 mm / 4.72 in. Sadly, I cant see any benefits of having 0 studs between the suspension arms, a concept I wanted to test. I had put the prototype`s render of the rear frame too, to have a better view of the concept.

Thanks for creating the topic! I am not sure now if it helps in any matter, but theoretically, aside from complicating the build too much, a 0 studs distance between the suspension arms might enhance the suspension overall. I said I am not sure because in a few days I will test-run the chassis of the Flat baja-truck MAXX, a WIP that needed some work to be done to make it work at least at a decent level.......I will talk about the model in a more appropriate topic, but the idea is took over form another of my projects - the ”Something 4x4” concept, that had 4x4 drive-line with 0 studs distance between the suspension arms both in front and at rear. The idea can be put only in large models, as it takes spaces due to adjustments needed to put even number of studs in the model. But I don`t think this worths the struggle as I don`t observe any huge impact on the suspension.

So....the Ultimum buggy is done! You can find the instructions on Rebrickable. Unfortunately, I don`t think there is enough space in the model to put a BuWizz 3.0 in it.

Looks just great! I think you should go to a static modelling exposition, as you managed to capture most of the details ;))

I think I can see what you mean. I thought the design of this type of wheel-hub is the same with the one which has the axle holes. But anyway, thanks!

The way I thought the drive-shafts should have a variable length and come with the joints at each end. I thought the pack more for short-course trucks, but I guess it will be easier and more convenient for everyone if there is no central differential. I am not sure we are speaking exactly of the same thing.......what pin-holes the joint would hit? And also, I will see what they will look to prevent anything grinding or hitting. Yup :/ And the differentials will come in a case with pin-holes something like Zene did. I will post later during the day a Bricksafe link to a PDF with some drawings and some explanations I did some days ago.

I dont know if it is worth bothering you with a separate topic for my idea, so I will post it in here. I want for some while to put a RC 550 brushed motor or its brushless counterpart in Lego off-road models but I never could achieved it because of the lack (in my opinion) of options for transmitting the power of a RC motor to the wheels, as the metal axles and other metal parts (excluding the universal joints) are expensive and modifying RC parts takes a lot of time and it is really hard. So I thought of making a project which wants to offer 1x motor adapter, 2x metal-geared differentials, 1x central drive-shaft, 4x drive-shafts, 2x rear wheel-hubs and 2x front wheel-hubs. As I didnt managed to make a prototype, I dont know the approximate price. The motor adapter is thought in fact to be a transmission with 3x outputs with ball-bearings, metal gear reduction and central differential. The drive-shafts (the central one being for the 4x4 drive-line and the other ones are for connecting the differentials to the wheel-hubs) are similar to the RC ones but more compact. The wheel hubs are basically modified 23801c01 for the front and 65766c01 for the rear with ball-bearings and custom connections with the center of the universal joint just at the exit of the wheel-hub. I still need to find someone that can help me with finishing the design of all the parts and to also source all the parts I can from RC hobby-shops. Unfortunately, I hope that the prototype will start taking shape in the summer. Also, I made a short questionnaire for seeing the response to such an idea - https://docs.google.com/forms/d/e/1FAIpQLSfUfz95Xrt-eZBQqmmQ5n-T5FaI0tJ_LK-Sa5sWSxsIwK8qLA/viewform?usp=sf_link

New speed record which was made yesterday - around 16 km/h / 10 mph on flat terrain and 18km/h / 11 mph when descending a pretty small hill. This was made with the Off-road buggy V4 - ”Ultimum” buggy, for which I still have to tie-up the Studio file. I used the large 56mm wheels fitted with 1.9” tires for RC models, which offer a top-speed increase but lower the torque drastically for medium models at least. Also, if you ever observed that the screenshots with the speed values have unaligned text, that is because I translate them, as the application for the smartwatch is in Romanian and I didnt managed to change the language yet. So, if you wonder how a ”stock” screenshot looks like, here it is. Moreover, the 2x motors Beach buggy seems to be a failure because of the friction that the drive axles have, most likely due to the angle at which the rear suspension-arms are, but that angle is not so big I will see what I can do about that, but I am pretty sure the 2x motors version will be dumped.

Great work! I really like the functions but what I like the most is the overall shape accuracy, which is hard to reproduce with Lego even at a large scale. And I hope we will see you more often ;)

It is okay. Thanks anyway for the answer!

Just great! The details are awesome and the functions are excellent too! And sorry for this question, but it will have instructions?

That is a even better solution! Thanks!

New baja-truck in the making - RC Trophy-truck. It has the usual positive caster-angle on front and the 2x buggy-motors but for a 4x4 wheel-drive and a Geekservo for steering because of the small space. For the fully independent suspension it uses 4x hard 6.5L shocks. Also, it has a detachable body-work and pin-holes for installing lights (4x lights at rear and 5 or 4 in front). Moreover, because of the arrangement of the motors, the small space and the pretty restrictive proportions for calling it a ”Trophy-truck”, the model uses a Geekservo for the steering, as I said, this implying the need of a partly dedicated set-up. So the RC Trophy-truck will be fully functional only with additional remote control parts; to be more precise 1x receiver and transmitter pack, 1x battery and 1x ESC (Electronic Speed Controller) that can handle 2x buggy motors but that will also not damage them (usually, hobby-grade ESC`s are not suitable as on long runs the motors will get burned). I am also aware that some points need more ”strength”, such as some areas on the body-work and also the stiffness of the suspension. I already made a few changes to the front-end of the front fenders, as the outer edges might fall-out easily.

Oke

I see. I think that the friend who wants to use the buggy motors with the Technic PU hub wouldnt mind too much. Thanks a lot for the clarification!

I see :/ Thanks for letting me know I see. I referred to adapters from PF motors to a PU hub. There are some on AliExpress, but I am not sure if they really work due to the differences between the PF and PU and the simple way of production of the adapters (usually just soldering PU cable with another PF cable).

I think so.

Well, I need to think how many savings I will go into :// Apart from that, glad that the Deck is powerful enough to withstand 4x buggy motors. Also, I didnt understand exactly: did you ordered the buggy motors with the ”crystal connector”, how CaDa names the PU plug? If yes, can you tell me if the motors work well with the PU plug connected to a PU hub?, because there is just 1x (negative) review on the official CaDa website on the buggy motors with the PU connector and one of my friends wasnt sure if it should order them or try an adapter from AliExpress.

That's ok.Thanks again ;))

I am pretty confused now........so flipping the front wheel hubs solve the problem after all?

Thanks. So in this way (flipping the wheel hubs), won`t hit anything?