CRAWLER X' coming..!

[helldriver]

This' the dual-motor crawler x made of some Mini Xs pieces and some OL parts.
Hope by the end of the month this one can crawling.
Yes it still looks bad, but this is a start for the next rigid chasis.
Any comments?

[3series takumi]

that is sweet!!!!

[Tbird Man]

I have something like this in mind, except it is gonna have the motors mounted on the chassis and driveshafts going to solid axles. and I am going to use a three point upper arm. and two two point lowers. instead of a 4 point setup. are the upper mounts on that bloted solit with no ball joints? and where did you get the links?

[helldriver]

Originally posted by Tbird Man
I have something like this in mind, except it is gonna have the motors mounted on the chassis and driveshafts going to solid axles. and I am going to use a three point upper arm. and two two point lowers. instead of a 4 point setup. are the upper mounts on that bloted solit with no ball joints? and where did you get the links?
1. Can't put the motor on chasis, since I dont have any skill to make the U-Joint for driveshaft.
2. Yes it was bolted with ball joints.
3. The links is made of used Overland's street version shocks. I rid off the spring and replace the rod with screw. So the length is adjustable. I will post the pic soon. Now I'm working on my brunt stock ESC.

[niceguyteddy]

I have a question, how do you guys mount those wheels and tires?

I bought a Tamiya 1/32nd Blackfoot to do a monster x mod but am not sure how to attach to those hubs.

[helldriver]

Originally posted by niceguyteddy
I have a question, how do you guys mount those wheels and tires?
I bought a Tamiya 1/32nd Blackfoot to do a monster x mod but am not sure how to attach to those hubs.
Just glue them to the stock wheel and trim it a bit.
See my pic.

[tinyrc]

Looks great helldriver! You should post this over at Mini-ZRacer.com as well, I think the Overland Mod'ers would love to see it! :)

btrc

[helldriver]

Hahahhaaa....I think my post will make them think twice to buy the new MadForce.:D

[tinyrc]

:D

[Hooters Driver]

Originally posted by helldriver
1. Can't put the motor on chasis, since I dont have any skill to make the U-Joint for driveshaft.

I have seen U-joints in just about the correct size available for R/C boat driveshafts. If you decide to try something like that Tower Hobbies carries the U-joints as well as matching diameter shafts and bearings.

[helldriver]

Very interesting! I try to search down there.
TY!

[niceguyteddy]

Cheers for pick of wheel mod, Nice one!

Can you drill the wheel hub (before gluing) to enable you to remove the wheel??

Other wise you would be stuck with a monster mini-x (maybe no bad thing ;-)

[DanielS]

Hi

funny you had the same Ideas than I had ;)

Mine is about the same stage than yours!

Yet I allready think I solved the engine Issue.

I will use am mini-z motormount and drive as a middle diff ;)

As U joints I will use graupner boat stuff - and a single Ujoint per axle - and the shaft will also be part of the axle linkage.

So my first go won't have dual motors.

would like to stay in touch with you - btw do you know killers work from the TTTT forum - on this site? - you should really study it.

[helldriver]

Originally posted by DanielS
Hi
funny you had the same Ideas than I had ;)
Mine is about the same stage than yours!

Glad to have some friend with the same visions..!

Originally posted by DanielS
Hi
Yet I allready think I solved the engine Issue.
I will use am mini-z motormount and drive as a middle diff ;)

Good idea. But it's quite expensive. I saw a guy that use 3 diff on his 1/24. Rear, front and the main diff.

Originally posted by DanielS
As U joints I will use graupner boat stuff - and a single Ujoint per axle - and the shaft will also be part of the axle linkage.
So my first go won't have dual motors.

I'm very frustrated about this one. Never find any here. I really want my truck seen as real as poss. Can you tell me the LHS that sell those things and the type fo u-joint?

Originally posted by DanielS

would like to stay in touch with you - btw do you know killers work from the TTTT forum - on this site? - you should really study it.
Sure, I will post many mails to you about the U-joint and so on.
Killer? He was my inspiration to make this crawler.
Do you have some pics about this project? Let us see!
Drop me mail at wing@cbn.net.id
C U soon! Thank you.
Bye.

[helldriver]

Originally posted by niceguyteddy
Cheers for pick of wheel mod, Nice one!
Can you drill the wheel hub (before gluing) to enable you to remove the wheel??
Other wise you would be stuck with a monster mini-x (maybe no bad thing ;-)
Sure. I drilled entire center section of the wheel, so I can remove/put the it anytime.

[helldriver]

A tons of cables. Yeah, gotta tidy them later.

[diets]

@helldriver
Could you post a picture how you mount the front motor?
What gears do you use?

I am working on a crawler as well. I am trying to make a real slow car for trial.

diets - 4x4x4

[helldriver]

Diets,
I made my own motor mount for front motor. It made of battery cover for this X. I put pics (3) about it.
For gears, I still use the old configuration. The stock one. I just read your reply for my questions, thanks for that. I have some broken CD ROM, hahaa... But I still have something that my crawler should be seen as real as possible especially about the U-Joint. Well, lets see.

[helldriver]

the second pic

[helldriver]

the 3rd pic.
Oya, the yellow plate under the motor is pcb. I dont get any graphics or carbon plate here.

[helldriver]

PCB for the front motor's deck.

[diets]

@helldriver
Thanks for the information - now i have some more questions.

Gear
Do you have no problems with the stock gear, driving over big obstacles? I think for a crawler you have to have a much higher gear ratio - maybe like the tttt - 1:100 or so.

Steering
I encountered serious problems, especially going real fast offroad. I think there should be a thight connection between the steering plate and the steering pins. The stock steering is too weak for real rock crawling. Can you steer when the car stand still?

diets - wants more power for the steering system

[helldriver]

Originally posted by diets
Gear
Do you have no problems with the stock gear, driving over big obstacles? I think for a crawler you have to have a much higher gear ratio - maybe like the tttt - 1:100 or so.

Sure it does. It was too heavy for crawling. Thats why I want to make with a single high torque motor, but I stucked with the U-Joint. Or should I use the smaller pinion? It means I have to re-arrange the motor mount, right?
Originally posted by diets
Steering
I encountered serious problems, especially going real fast offroad. I think there should be a thight connection between the steering plate and the steering pins. The stock steering is too weak for real rock crawling. Can you steer when the car stand still?

Yes, it would really be a problem for the sprint off-road. But it was steering normally so far for crawling with - sometimes- loosen the rod, hehehe....
That was my handicap, it's very difficult to find parts for R/C here. This is my wish-list: U-Joint, steering swahsplate link, carbon fiber plate. Nothing here.
http://tinyrc.com/forums/showthread.php?s=&threadid=13318
C ya.

[DanielS]

some other nice pics from diets ...
http://www.tinyrc.com/forums/showthread.php?s=&threadid=16152

[lowam]

i just got finished with a very very similar set up running off of 7.2 volts but i t was so under powered that it wouldnt pull its own weight. why do you think it was so under powered

[diets]

The higher the voltage the higher the speed of the motor. There is no great effect on the torque of the motor, is you raise the voltage.

The 130 motor has not enough torque to rotate these big wheels. You need a gear box with a high gear ratio.

If you use the stock diff and spur gear, then you have a gear ratio of 35:8, this means 1:4,375. You will need a least 1:20 for a straight road.

For rock crawling, you have to drive real slow, the higher the gear ratio, the better. In my actual project i have a gear ratio of 1:400, with a dual motor setup. Two motors is double torque.

diets - want's to see some pic's of your crawler

[DanielS]

So if i understand correctly my Mini-x final drive will be 35:8 - 1:4,375 so if I add the Mini-z ratio of my design it shall be multiplied correct? so this will be around 45:6 ( i am to tired to count) - so 1:7,5 if I multplie this i get 1:32,8125 is this correct?

Will it be enough? - I hope it will do to get the thing moving in the first place ;)

[diets]

I have two different setting for my 4x4x4.

The above mentioned dual motor setting with approximatly 1:400. It is slow enough for crawling and has more torque the it will ever need.

The single motor setting, with one Topcad R02 modified with extra neodym magnets. The transmission consists of spur/diff gear combinations of the stock mini-x. The gear ratio is 8:35 for the center diff and another 8:35 on each axle. So i have a an overall gear ratio of 1:19. The mini-x goes pretty good with this combination. Enough torque and speed for an offroad track.

So i think your mini-z setting should be good as well. You can use larger spur gears if you like. The torque should be high enough.

diets - will show more pics of the 4x4x4 soon

[lowam]

how do you post pics?

[lowam]

sorry about the pics my camera sucks.

[lowam]

sorry about the pics my camera sucks

[diets]

The pic you posted is empty, i can't see anything.

First off all you have to upload the picture file to a public file server or to your email host if you have webspace. btw you should use the jpg format, because the files are much smaller then bmp's

Posting Pics

Wenn you write your post, use the button IMG, just over the edit field (named vB Code) end enter the url in the popup box.

diets - free webspace is needed

[lowam]

i cant get my camera to work. sorry! as soon as i get it to work ill try to get some pics up here. but anyway instaed of using the regular motors. i made a 2 transmission(one front ,one rear) out of a couple of older futaba servos. its not fast at all in fact it barely creeps along but the tork is crazy. it climbs really good. the chassis is a monster truck style (sort of like the txt-1 but smaller) that i cut out of aluminum. its a 3 link suspension right now but soon ill swich it over to a 4 link as soon as i find some better shocks.

[3series takumi]

hey helldriver i just yanked some universal joints from the xmod awd kit. mod them to use in the front of the minix. i got tired of chasing down dog bones or lookin for them after hittin a wall or somethin. you should check them out if you are still lookin

oh and if the money didnt go thru i am gonna have to order the cameras without you.