[HELP] Making a crawler....

[aminnich]

Hey guys, i have been going back and forth with different LEGO projects. I start one and then start another one and end up taking the first one apart for the pieces...

So i make a pretty awesome crawler drive system, but i dont have any shocks. Do the crawlers need shocks, or are their ways around not using them??

[Zerobricks]

You can make a crawler without shocks, just use pendular (tiltable) axles.

[F41RF4X]

Do you have any instructions for you crawlers I wanna make a buggy or crawler and love the idea of making dislocating suspension to give massive travel on the wheels any ideas on this

[Zerobricks]

I suggest you to check out my youtube, lots of crawlers and links for instructions there...

[aminnich]

Do you have any instructions for you crawlers I wanna make a buggy or crawler and love the idea of making dislocating suspension to give massive travel on the wheels any ideas on this

I have never made a crawler before, i was just messing around and a drive train a made climbed everything haha.

[Imanol BB]

you can use lego normal cross axles as leaf spings, if you put them very close to each other, you can get a very tiltable suspension.

[aminnich]

can you give me a good example of pendular (tiltable) axles on another model???

[Imanol BB]

i will make a quick example in ldd

some examples (the red axle represents steering and driving):

1) hard:

2) soft:

if i am not wrong, i used this system in my marauder some time ago: http://ldd.us.lego.c...a6-8362f295cd1b

Edited September 1, 2015 by ImanolBB

[AndyCW]

At the speed that most Lego crawlers operate, there is little need for shocks, but there is a need for articulation and that can come from linked pendular axles.

Some builders use flex axles as leaf springs.

v/r

Andy

[Imanol BB]

you can also try to make your own shock absorbers, for example i used the coil springs from a toy, i used an axle with a end stop, an angle piece and a cross block, and then i got very good working shock absorbers

[aminnich]

ImanoIBB; thanks for building that.... im not exactly sure how it works but i will try it.

[Imanol BB]

something like this:

you only need to put a coil spring between the 2 yellow parts, and in case the coil were to wide, just put a disk-like piece in the lower part.

[aminnich]

i have seen those before, but i have to find springs that fit well on a LEGO axle. Probably a pen spring would work nicely, but they are not very long

[Rockbrick]

i have seen those before, but i have to find springs that fit well on a LEGO axle. Probably a pen spring would work nicely, but they are not very long

so you need lots of pens then....

[Nalyd997]

Or you can do something like VKTechnic did in his jeep lower forty and have the two pendular axles connected by gears, so that the opposite axle always turns in the opposite direction. This keeps the body stable