Mechbuilds

I have a tiny issue though.. When i have full steer lock and drive, the CV joint tends to vibrate and jump. Also it slows the XL motor down a bit.. But when i go forward, it goes faster and doesn't jump. Can i just ignore this? I can't find a way to reduce the steering angle without completely disassembling the front end..

I'm making it RC. Already fitting a servo + XL motor is already over 16 studs long and 5 studs wide and 5 studs tall if you make it as compact as possible. Currently i have a good module done that's as compact as i can make it. front side of the axle has the XL motor in the center and the rear side of the axle has the servo for steering. I'm using those black wheel hubs with axle holes on the sides. I could basically make the moc two studs narrower by flipping the tires.

Fitting both steering and articulation inside a tiny 15x20 stud box is very compilcated. I opted for steering + front wheel drive instead.. Basically the front end has everything. Driven wheels + steering + XL motor + servo + receiver and battery box. Everything in one big package. The rear is attached to a large turn table. This way, i can build different things that attach to it and have the ultimate modular truck.. But i gotta agree, articulated steering + regular steering + shocks + turn table center mounting would make a truck impossibly flexible. It could be considered a crawler by then.

Basically yeah. But instead of the front end being articulated, it would have turning tires instead. But i'm thinking "should it have turning tires instead of articulated steering" because the chassis is currently easy to redesign before i actually make the bodywork. Instead of having the bucket at the rear, it'll have a bed for carrying battlemechs.

My plan is to make a 6 wheeled 4 wheel drive truck that has four rear wheels for drive and two front wheels only for steering. It'll be servo steered and the front axle has no suspension at all. Instead, the front of the moc is attached to the rear of the moc by a large turntable. So the battery box + servo + receiver is mounted in the front half and an XL motor is mounted to the rear half. Basically the front of the moc is just a one big unit that can steer and the rear of the moc is one unit that can push the truck forward. Questions: 1. If i use a servo to steer instead of two linear actuators (articulated steering) will the moc try to push forward instead of turn due to no driven front wheels? 2. If i use sideways pendular axles for the rear and a turntable in the middle, will the rear of the moc just flop to the side if no springs are added? 3. Should i use forward/backward pendular suspension for the rear wheels instead? 4. Would having only two rear wheels increase the performance of the moc due to only two rear wheels pushing the moc forward and decrease pushing when steering? 5. If i use only two rear wheels instead of 4, if i add springs to the rear, will offroad capabilities increase? (remember, the front half has no suspension at all.) I do not have room for the front axle to have driven wheels. (unless i completely redesign the front axle and have a driveshaft go trough the turntable.) Moc is going to be 11 studs between tyres (total width 15 studs), 60 studs long and 20 ish studs high. Front of the moc will be a "one size fits all" truck front end and the rear will be a modular frame for different applications.

Awe- wait for it. -some

EDIT: Could somebody help me design a 13 stud wide axle that has a servo and XL motor mounted and as compact as possible. No suspension needed. Just drive and steer. It needs to fit under the mercedes arocs cabin. Under the cabin, it's 5 studs wide and 13 studs long space that can be utilized.

I wish i was at least half as good as making bodywork.. I mostly make great chassis but the bodywork is iffy at best.. Gonna copy that rear fender design. Looks amazing!

That thing looks amazingly good. Well done! Definitely following this thread!

I'd love to see some pics.

It took me hours to make the chassis and gearboxes due to the illogical build order of the LDD.. It was a massive headache and some parts needed to be bent agressively to fit the backtracking of the LDD's stupid order.. But i managed to make it.. Now i'm only waiting for wheels + tires and some body pieces.. Proper logical order instructions would have helped a lot. Wouldn't have hurt to check the actual TLC's instructions too..

XL TORQUE!! It's getting better and better.

I downloaded the "xerion rc-5.lxf".. Is this a one servo steering moc? Does it have all the steering functions? I tried to find a RC version of the xerion but all use two servos. I just want one motor(servo) for turning and one for drive. Is this a working moc? EDIT: Found @efferman's video and downloaded that.. It looks identical on a quick glance. Waiting for the build guide mode to load....

Why not just turn the turntable with a gear and turn that gear with a worm gear?

I'd remove the diffs.. The problem with 3 diffs is that if one wheel starts to skid, the whole model is stuck. You want all the wheels to be driving on a 4x4.. Unless you have lockable diffs.

Even though it looks awesome.. It looks like if i pick it up, it'll fall apart in my hand.

You should use these for the rear axles:

They literally had no idea how expensive those sets still are.. I suspect that he was just old and thought legos as kids playthings that are worthless after buying them.

After testing it out, there's not enough torque. Gotta stay with the XL.

Update: This is my current moc: 4x4 Offroad chassis. What i'm thinking about is that i could make a pick up truck style body there. But the XL motor is pretty massive. I could change the XL motor to an M or L motor easily without modifying the chassis. The question is: Should i do it and how will it affect the performance or crawling capabilities? It's geared: 4.632:1

In my opinion, we should first have a contest on the chassis itself.. Then vote which chassis is best. Then we make a new contest about axles, but this time, the axles need to fit the chassis we voted best. Then make the bodywork, ect.... It would truly be a eurobricks car designed by us.

I love the fact that you can separate the body from the chassis. Great work!

Typo on: 5. 9V-RC motor "1. Most oowerful Lego moto" Should be Powerful Edit: Also in the last sentence, "Remeember to use diagonal support, since triangles are the strongest shapes."

I'd love to get my hands on the LXF. I'm more interested in the chassis. But yes the bodywork looks amazing :)

Would this chassis work for what ever you're constructing? It has high steering angle and 4x4. Lost of flex and great crawling for it's scale. EDIT; it can also be made to go very fast by switching the middle gears around. Normal gear ratio is 4.632:1 When switching the gears around, you get 1:1.667