piterx

The chassis is DONE finally...because i was really getting sick of fixing it in the multiple issues it had! now it works fine, the completely recharged lipo gives enough power to start the car even with the 4th gear...wich is pretty fast! the gearbox is sturdy and the clutch doesn't get stuck anymore.. and a lot of things are tidier than before wich is something i really like it weighs 1270g ... now it's time to build the body, but i think i'm gonna go light as usual, so flexible axles and tubes, and some details more where it needs to have them do you wanna see a WIP for the bodywork as well or shall i keep it secret till the end so it will be more like a surprise :P?

looks quite epic man :D are you going to put panels all around it at the end?

my dad built one of these out of wood when i was a kid...great job

i thought about that...if you make two free wheels one clockwise and the other one anticlockwise it works for both directions....the only problem is that it gets quite big lol

usually you don't even need to wait for centrifugal force... gravity is enough to engage it :) you need high RPM to avoid rubber parts flipping in the wrong way and yes, you need brakes and reverse gear if you wanna use it in a moc...but it's so cool having a smooth transition between "moving" and "steady" ...and it's very nice as well everythime you get the car into a slope as you don't need to accelerate :)

well, the service truck hasn't all the pieces to make it :P

unimog wheels slipping? ahah so cool i look forward to the video :)

guys what instructions would you prefer? power function ones or classic lego style?

ahah that's great man! very original idea :)

yeah i think i'm gonna use a single lithium battery...exception made for the steering and the engine every motor is activated alone... anyway i could consider adding a second lipo battery if the final weight won't be a problem once i fix the driveshaft :)

Chassis finished :) Time for finetuning....wich means dismounting the chassis to move the gearbox 2 studs up -_- I'll explain what's happening: as 2 XL motors have a lot of torque, whenever the wheels get into an obstacle, all the torque is spreaded along the clutch and the gearbox's shafts causing dismounting or deforming...that is bad obviously :) what i've done is gearing up 3 times the motors to have more RPM and less torque (wich are inversely proportional) the problem is that, at this stage, the gearbox is transferring to the wheels a lot of RPM but such a small torque that the two XL motors are overstressed when i engage the 4th gear... It means that i need a final reduction after the gearbox to bring back all the torque i want on the wheels... i really hope this will solve all my problems im so tired of dismounting and re-mounting this chassis... edit: ah! the braking sysem works great :D

what a tidy chassis *,*

i wonder why this thread has been seen 130 times and no one spent a word to tell you how nice this moc is :) i'd just make bigger front lights maybe...but it looks good !

mine is a frewheel...i just cheated using half stud to fill the rubber parts otherwise it could get stuck if too much torque is applied... 10 minutes ago i just discovered something that is so stupid that i've never thought about it... the clutch and the gearbox have to run at the highest RPM possible and at the lowest torque so they never have problems xD

ahah of course i will XD so now it's tidy and effective finally! but the problem is always behind the corner....the autoclutch tends to stop working when too much torque is applied :\ as you may notice i've changed the two L motors with two XL geared up... edit: problem solved... the statement is: "run the clutch and the gearbox at the highest RPM and lowest torque possible" :)

it's similar to mine...except for the fact that you're using those 8th gears wich are completely useless :P

it's coming out great! the only thing is that i'd make the axle wider...seems like the wheels are too inside :P

that depends more on the compression the file has than the resolution... it's strange though, you're using a gopro wich has the h264 format that's the one of the lightest... i'd suggest you a gopro...it's cheap and light, and if you get the first HD one that came out you can get it for something around 100€... of course, if you can afford it, get the latest one wich has a better sensor...the only "problems" with gopros are that you don't have a screen to frame what you wanna shoot (unless you buy it) and that it has fisheye (wich someone may not like)

eheh whenever you wanna come just tell me with a little bit of notice, i live near the center so i can come to meet you at the central train station :D edit: let's say i live in the center as im just 4 metro stations from the coliseum

:D come visit me in rome dude ahah

lovely :) i might do one as well one day...but with wheels :)

yeah he's the guy who made the 90° rotation mechanism! very clever idea...i've tried hard to make something different but it's just like the front suspension that nicjasno did...perfect xD yeah the gearbox is absolutely compact and mainly is stronger than classic ones..the only problem is that its un-synchronized but you can deal with that :)

for the brakes im gonna use a third servo that just arrived at my place :D i have to fix the rear suspension setup yet...i need it softer than it is now...i might change something yeah of course i will...i think i'm gonna make instructions for it as i'll probably want to use it for other vehicles in the future :)

hey guys thanks for your help! at last i've done the 4 link system....did i make it right? it still need the panhard rod...it seems to work fine...the axle goes up straight if you notice something wrong please warn me :D

ok : after the 3rd re-build of the gearbox, wich had some troubles when too much torque was applied on the 2nd gear, now every gear can make the motors stall.... FINALLY lol I also added a white gear indicator to know wich gear is engaged to avoid starting the car in 4th gear... Another good thing is that as the gearbox is more solid than it was it seems that the shifting is smoother. Immediately after the gearbox you can see a rubber wheel wich is the braking system...i've tried to put disc brakes on the rear axle but it wasn't coming that elegant as it was oversized... So i decided to put it on the main shaft...it's pretty strong and it will do its work as it can make the motors stall even in 2nd gear :) The rear live axle needs the panhard rod to avoid side moving...and i also need to reinforce the beam wich is holding the suspension as at the moment it bends Hope you like it! if you have any suggestion on things that i could do in a tidier way they're welcome :) now i just need to give a second built to the shifting mechanism just in order to see if i can make everything tidier