Kamil

Front windscreen area of the 6x6 Bug is redesigned, an openable windscreen is added: All the best

Thank you, White may be? I am looking forward to see how it goes with XL motors. All the best

Inspired by your work, I had a chance to re-work on this vehicle at the weekend. As I have limited choice on colors, I asked a Ferrari designer to create a road version of the bug This vehicle has nearly same dimensions as Lego 8448 Super Street Sensation:

First issue: All differentials in opposite directions? When looking from the bottom side (front is up), front axle first differential main gear is at the left side. Mid axle differential is at the right side. Rear axle diff. main gear is at the left side again. Second issue: It is the mentioned issue before. Check bottom beams between the two L motors and the front axle. Squeeze them if you find them separated apart. This gear can only be used when the surface is flat, and vehicle is at complete stop. Start giving low throttle while on start. Happy you have applied (or trying to aply) new gear ratio. All the best

Really cool, I like it. A spaceship on the road. Good job

High gear is working good in 4x4, but not effective in 6x6 due to high friction. I tried high gear, vehicle cracked and stopped. I thought I have broken red differential case part. However it was the beams (near the front axle) separated sideways under high load. I have re-squeezed the beams into place, and high gear worked again. But this issue is easily repeated. I would prefer to take out the servo motor and connect low gear directly. So, 42099 hub could be used. Otherwise reinforcement may be necessary to hold the beams in place.

Hi @vliet Have you tried to select 42099 x-treme off-roader from your phone app? Or, if you have the 42099 set, than maybe you can use its hub and motors. I would also be grateful to hear more solutions, if any.

All pics in order:

ævliet No problem, my busy days, maybe tomorrow I can upload all in their original resolutions :)

I have limited time at the moment, so I will try to post others later: Hope it helps for now, All the best

@vliet Hi Sander, power is coming from the two L motors from the Lego Zetros set. I think it would be better if you could insert XL's. But the original Ultra 4 Buggy is compact, and may need major changes on the initial design (not tried that). All the best

Thank you, @gyenesvi's original 4x4 model plus some 6x6 modifications.

Hi, A few changes have been made to the rear bogie of the 6x6 Bug. The lower control arms are lowered two studs below. The upper 16 stud links are doubled on each side. This gives less flexibility of the bogie but better sand performance. Negatives: - Less flexibility so watching the bogie on action may be less entertaining than the old one. - Suspension travel of the mid axle is limited more, so it can not come down as much. - 39 degrees ramp climbing has not worked with this redesign (not included in the video below). - The bending issue discussed above still happens (not included in the video below). Positives: - Better sand climbing performance. - Better overcoming of solid obstacles. - Less mid axle stalls. - Better progress on rough terrain. Well, as this vehicle is powered by two Lego L motors, it may be a little unfair to add new weight to this bug by adding a more complex drivetrain. I think it gives optimal performance here: All the best

@bartybum Hi, thanks ! If I get it right, you are asking this issue below (Pls note, my file size quota for this topic is limited): Yes, that is also a part of the mentioned plays in the bogie. This happens when the vehicle is forced to extremes. Power comes, and the rear axle tends to rotate backwards. The black beam inside the red circle is the only resistance to this rotation. While the axle is rotating, the black beam hits the 16 stud grey link. If the force is high enough, then black beam bends the grey link upwards. This action is limiting the axle from fully rotating. Another reason for bending is; the upper grey links and the lower control arms are too close to each other. I thought to mount the lower control arms into a lower position under the bogie. But, there stands the cv axle, and I had to mount it on a very low position. Then I would lose a lot of ground clearance. Negatives: The rear axle loses some parallelism with the ground when the vehicle is forced to extremes. The CV joint connected to the rear axle comes near to its working limits. Positives: Very flexible bogie. High sideways tilting. The 16 stud grey links act as torsion bars for sideways tiltings of each axle. The 16 stud grey links and the below control arms allow seesaw movement of the bogie. The rear axle trying to rotate backwards means, the axle is doing its job, and playing its role for moving the vehicle on a steep ramp. High ground clearence Lightweight equipment All the best