efferman

thanks @timslegos i have made a short step by step instruction. in the flickr folder you can find more steps 101_9465 von efferman auf Flickr

it seems to be a combination of improvements. sure the tires giving more grip and ground clearance. then the lipo give a little bit more voltage than my eneloops in the batterie box. then i have raised the gearratio from 1:7,722 to 1:13,8xx. this was necessary because the bigger tires needs more torque. and last but not least are giving thew softer springs more contact to the ground. @Timslegos sure i can do it

thanks in meanwhile i have made some pictures 101_9451 von efferman auf Flickr

the 9398 C-model has shown that simplicity has big advantages. So i decide to kill the big crawler and and have optimized the c model with external parts. but there is only one question: is it a skunk or a black kitten with a white stripe on the back?

yes the a model looks very good, but it is simply to heavy. btw, now i know why tlg uses the new tan 4L axles: a normal crossaxle is moving out of the hole when it is under high load. it seems that they tested their prototypes under high load to prevent something like this. overall, i must give lego my full respect, they give us with the 9398 set everything what we need, to build a good crawler. @z3_2drive maybe we can made with this method a multi axle setup without a complex steering system. simply one servo per axle. but to see if the servo has enough power with a direct linkage, instead a gearrack, needs a try

very good work how big the jet will be when it is finished?

a first testrun for the c model crawling with the included parts is possible, but i think softer springs would work better

Conchas, thanks for the video. did you noticed on your trials, that the rear axle often (near the ball joint) is stuck an a obstacle before the tires can hit it? to solve the problem i have modified the rear axle of my C-Mod 101_9418 von efferman auf Flickr can please someone check at his 9398 if he has the same problem?

well, they may better berform, but my first intention to search for other tires, is the look. kornis posting says everything and a project of a doktor brick member shows it again.

something like this? 101_9405 von efferman auf Flickr

has someone see this on his vehicles too?

the axles are nearly the same, every else is different.

i have didnt counted it, but i guess roundabout 300 parts

does someone heard when the instructions for the C-Modell goes online? 101_9416 von efferman auf Flickr

or they want to be sure that the servo has enough power for steering

yes, please look here

i have used eneloop accus out of the box. so it is possible that they are not completely full

i have tried it a minute ago, and it doesnt fit

ok, on a slick ascending slope it works till 30°, then the rear axle motor goes into stall, because the frontaxle has no grip. obstacles, my foot for example, against a single tire, are possible till 5cm height. overall is grip the problem. with my ansmann tires is much more possible. the vid which was posted by anio shows good the possible performance.

what can we do when a joint breaks during inserting a axle? your differential theorie is interesting and on normal tracks i give you a full agree, but on tracks with different grip on every tire it will stuck on the easiest obstacle. so i think it would be the best solution if every tire has its own motor. btw, is it only me or is there something wrong in one of the following pictures? 101_9406 von efferman auf Flickr why can lego not produce tires with good proportions? every time these ugly spheric ballons

when i have finished it, i will test it with used original tires, to see its true performance

no, because i dont own power puller wheels

i think not, but we can remove the diff and use a simple gear and going trough connection. but i think also that the center of gravity is too high for heavy terrain

ok,power is enough, but there is a little problem with the diffs the name 4x4 offroader is plausible, but please stop call em crawler

five minutes ago my 9398 has arrived and the tires seems to be identical. only a oily film is on the surface. i think there is a need to wash them