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My one and only Crawler, upgraded and vastly improved !

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My one and only Crawler, upgraded and vastly improved !

Post by Ezekiel Freshmen on Sun 16 Sep 2012 - 19:38

A motor on axle style rock crawler. Driven by 3 High torque NXT motors giving it more than 16Nm torque. Traxxas MUD tires, 3kg servo, Spektrum receiver, and Futaba DC speed controller.

Specs
Weighs 1.2 kg way lighter than ur usual builts.
Wheel base 12 inch
Length 16 inch
Width 8.4 inch
Height 8.5 inch
Ground clearance 4.6 inch ! much much higher than yours truely !
Wheel diameter 4.3 inch / 110mm / 1.9 tires

Lithium polymer Nanotech 2s 1000mAh
Futaba MC230CR







Front 4 Link joint for extreme articulation


Simple Independent suspension, average articulation but twice the amount of torque !


Front motor on axle with 3kg Servo.




Front and Rear portal axles.




All differential locked it just keeps going. This is actually my 5th or 6th rebuilt with the previous ones being driven by a hobby Brushless motor. However the live axles kept breaking under heavy torque and had to go for direct drive, MOA.


<u>HISTORY of build</u>
Here are the live axle versions of the build powered by a 28mm 905kv brushless motor. Plenty of torque but power loss from live axles and gears made unreliable.








Thanks for viewing !!

With my new found knowledge to control the motors using a hobby speed controller, I wonder how humongous my next build might me (:

Can anyone tell me how I should test my rig so i can maybe follow one of the trials if you guys don't mind an unusual trial truck ?


Last edited by Ezekiel Freshmen on Sat 22 Sep 2012 - 21:49; edited 1 time in total

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Re: My one and only Crawler, upgraded and vastly improved !

Post by wyetuck88 on Sun 16 Sep 2012 - 20:02

Very nice, one of its kind. How much is the whole set up?
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Re: My one and only Crawler, upgraded and vastly improved !

Post by Teck on Sun 16 Sep 2012 - 20:05

Lego Shocked
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Re: My one and only Crawler, upgraded and vastly improved !

Post by Ezekiel Freshmen on Sun 16 Sep 2012 - 20:24

wyetuck88 wrote:Very nice, one of its kind. How much is the whole set up?
Well, some specific parts came from 2 lego sets and rest from my older sets. If count by sets = more than 1K, if by parts used then maybe about 200 over w/o receiver, ESC, Servo and tires. All in All I paid only $40 for the Traxxas tires, NTC hobbies just started Traxxas products ! must GO !

Everything included would be around $400+, but heck price isn't the issue here, I can custom build it very very easily.

Teck wrote:Lego Shocked
Don't play play ~ it can crawl okay ! just isn't water proof Sad
Lego might be flimsy but with the right design and stuff, plus it's made from high quality ABS plastic, heh heh heh. Comp rig !

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Re: My one and only Crawler, upgraded and vastly improved !

Post by Liew on Sun 16 Sep 2012 - 20:52

Wow !!!!!
Can joint trail with us ? Very interesting !
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Re: My one and only Crawler, upgraded and vastly improved !

Post by Ezekiel Freshmen on Sun 16 Sep 2012 - 21:00

Liew wrote:Wow !!!!!
Can joint trail with us ? Very interesting !

I want to, but i need to do more testing and put another motor on become 4 motor, ltr not working den xia suay lol. when do u guys usually trail ? I can only make it on weekends, serving NS now .

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Re: My one and only Crawler, upgraded and vastly improved !

Post by Liew on Sun 16 Sep 2012 - 21:10

We trail every Sunday !
Wellcome Very Happy
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Re: My one and only Crawler, upgraded and vastly improved !

Post by wyetuck88 on Sun 16 Sep 2012 - 21:25

$400, icic got to be careful with the technic Lego set, they are prone to cracking after some time, mine did after more then 5 years.
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Re: My one and only Crawler, upgraded and vastly improved !

Post by Ezekiel Freshmen on Sun 16 Sep 2012 - 23:16

wyetuck88 wrote:$400, icic got to be careful with the technic Lego set, they are prone to cracking after some time, mine did after more then 5 years.

Don't stress it too much can le. Spares are like 10, 20 cents up to 5$ only, haha. most importantly is to keep it light.


@Liew, is there a page to check where the next one is at ?

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Re: My one and only Crawler, upgraded and vastly improved !

Post by Ezekiel Freshmen on Mon 17 Sep 2012 - 16:22

Will it be advantages for trail or crawl if I could control the 4 motors individually? Any possible scenarios you've came across that might have benefitted from it ? Cuz I'm weighing the benefits with added complexity and weight.

I've already got plans and design rdy for 4 MOA, 1 motor per wheel, which in a way acts like an opened and locked differential at the same time.

Best of both worlds !

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Re: My one and only Crawler, upgraded and vastly improved !

Post by boolean21 on Mon 17 Sep 2012 - 16:37

welcome on board..

interesting to see a lego crawler.... Smile

with 4 MOA, one motor per wheel, first thing that come to my mind is that you can do stationary 360degrees turn... Smile


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Re: My one and only Crawler, upgraded and vastly improved !

Post by coldman28 on Mon 17 Sep 2012 - 20:51

let trail at Bukit Batok Little Quilin to try your set up.
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Re: My one and only Crawler, upgraded and vastly improved !

Post by Teck on Mon 17 Sep 2012 - 21:17

coldman28 wrote:let trail at Bukit Batok Little Quilin to try your set up.
O yes best place i know Twisted Evil
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Re: My one and only Crawler, upgraded and vastly improved !

Post by Ezekiel Freshmen on Mon 17 Sep 2012 - 22:41

boolean21 wrote:welcome on board..

interesting to see a lego crawler.... Smile

with 4 MOA, one motor per wheel, first thing that come to my mind is that you can do stationary 360degrees turn... Smile


Thanks, 360° turn might be possible, depends if the terrain allows the tires to slip.

coldman28 wrote:let trail at Bukit Batok Little Quilin to try your set up.

When ? I have friday and sat to rebuild and upgrade.

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Re: My one and only Crawler, upgraded and vastly improved !

Post by boolean21 on Tue 18 Sep 2012 - 11:34

where do you buy the lego spares from? do they sell individual bricks / accessories?

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Re: My one and only Crawler, upgraded and vastly improved !

Post by Ezekiel Freshmen on Tue 18 Sep 2012 - 14:16

boolean21 wrote:where do you buy the lego spares from? do they sell individual bricks / accessories?

Secret chamber singapore sells individual parts, subjected to availability. They do have quite a lot of them. Gears, axles, beems.. Axles are the cheapest. Sometimes they might have unique parts too.

There are even metal aftermarket parts online too.. Kinda cool.

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Re: My one and only Crawler, upgraded and vastly improved !

Post by boolean21 on Tue 18 Sep 2012 - 14:31

Ezekiel Freshmen wrote:
boolean21 wrote:where do you buy the lego spares from? do they sell individual bricks / accessories?

Secret chamber singapore sells individual parts, subjected to availability. They do have quite a lot of them. Gears, axles, beems.. Axles are the cheapest. Sometimes they might have unique parts too.

There are even metal aftermarket parts online too.. Kinda cool.

ok thanks. Smile

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Re: My one and only Crawler, upgraded and vastly improved !

Post by Ezekiel Freshmen on Wed 19 Sep 2012 - 15:06

Do you guys use any ackerman steering ? Mine currently has reversed ackerman steering.

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Re: My one and only Crawler, upgraded and vastly improved !

Post by Ezekiel Freshmen on Sat 22 Sep 2012 - 21:43

Upgrade !! Version 3. Renamed to The BEAST !

New Specs
Chassis Tube Type 4x MOA
Max Articulation 110 Degrees !!!
Front suspension 4 Link Type
Rear suspension Pendulum Type

Weight 1.4 kg from (1.2kg)
Wheel base 13/14 inch depending on suspension (12 inch)
Length 17/18 inch (16 inch)
Width 10 inch (8.4 inch)
Height 9 inch (8.5 inch)
Ground clearance 5.2 inch (4.6 inch) ! much much higher than yours truely !
Wheel diameter 4.3 inch / 110mm / 1.9 tires

Lithium polymer Nanotech 2s 1000mAh
Futaba MC230CR










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Re: My one and only Crawler, upgraded and vastly improved !

Post by wyetuck88 on Sat 22 Sep 2012 - 23:23

nice. Yours can come out with many different version as and when you like, ours cant.
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Re: My one and only Crawler, upgraded and vastly improved !

Post by Ezekiel Freshmen on Sun 23 Sep 2012 - 1:59

wyetuck88 wrote:nice. Yours can come out with many different version as and when you like, ours cant.

Yea, the only downside for mine is the top speed. currently it's only around 2 mph.
If I got robot servo motors top speed maybe 10mph. by then i'll probably make the whole thing out of metal.

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Re: My one and only Crawler, upgraded and vastly improved !

Post by Ezekiel Freshmen on Sun 23 Sep 2012 - 12:50

alright, although it didn't match the rest of the rigs it was still a success. today's run at guilin lake was to test specific parts and build techniques. The next rig will incorporate the good parts leaving out the bad parts.

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Re: My one and only Crawler, upgraded and vastly improved !

Post by wyetuck88 on Sun 23 Sep 2012 - 14:21

Good work. Saw your crawler today it's beautiful. I think you have to strengthen the joints, they pop out when the crawler took a fall.
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Re: My one and only Crawler, upgraded and vastly improved !

Post by boolean21 on Sun 23 Sep 2012 - 15:52

i think your dad is supportive of you getting a trail truck... Smile

get an scx10... Smile leave the lego for light duties.. Smile
thinking of getting a lego semi truck...!

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Re: My one and only Crawler, upgraded and vastly improved !

Post by Ezekiel Freshmen on Sun 23 Sep 2012 - 17:32

boolean21 wrote:i think your dad is supportive of you getting a trail truck... Smile

get an scx10... Smile leave the lego for light duties.. Smile
thinking of getting a lego semi truck...!

Agree, lego can go only so much. I like the dingo kit however my wallet prefers the Ax10 Ridgecrest.
I mean i can get the Ridge and self mod it till it looks like a scale truck. what do you think ? I asked and none of you guys have the Ridge yet.

Which online store do you guys usually buy from?

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Re: My one and only Crawler, upgraded and vastly improved !

Post by ket2175 on Sun 23 Sep 2012 - 22:51

Hi we usually order our trail truck at Tower hobbies. Get a SCX10 , u wont go wrong with it. Very Happy
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