RC4WDs New Micro Crawler

[TownsendTdi]

Playing on some rocks with the D90:

https://youtu.be/bj0XLj030nU

[TownsendTdi]

Originally Posted by chevy55

29:1 gru with a 70t 130 can. Plenty of power now.



2s test run:

https://youtu.be/Z05PTb7GGAI

What gears are those? Mini-sized?

[Aeronuclear]

Anyone has the stock pinion out of the car? Is it possible to check the overall diameter of the pinion? Thanks...

[TownsendTdi]

Swapped stock links to redcat sumo balls and rod ends. The balls have m2 threads so they screw right into the axle brackets. They are a hair short going through the chassis plates- they don't make it to the nylon locking part of the nut, so I used loctite. If one comes loose, I'll grind the chassis a hair by the holes.

Just as much as my Specter:


Behind axle steering link. 2mm threaded rod with rod ends mounted above rear knuckle mount. The short link was replaced as well with rod ends that move more.

The shocks are losi mini desert truck front shocks with the spring perch removed. 10wt oil and about 10mm of a trekker/micro t spring inside. They are relatively inexpensive at $10/pr.

[Ubergoober]

Why did you go with the trekker t spring vs the stock spring? Isn't the stock spring about 10mm? You cut the trekker spring, is that correct?

[TownsendTdi]

Originally Posted by Ubergoober

Why did you go with the trekker t spring vs the stock spring? Isn't the stock spring about 10mm? You cut the trekker spring, is that correct?

I made those shocks to put on my trail trekker a long time ago but they were a little tall and set them aside- they worked perfect for this project! I used that spring because these weren't out yet Any piece of spring that fits inside should work. The micro t springs come in 3-4 different rates in a pack (LOSB1600 or 1601) if you wanted to play with spring rates. You can use however long a piece you want for how much droop you want- mine is about 75% sagged I'd estimate.

I'll make a thread for this thing, I've got some pics I need to add that would be helpful if anyone wants to try this, and I don't want to clog up this thread too much.

[Aeronuclear]

Originally Posted by TownsendTdi

Swapped stock links to redcat sumo balls and rod ends. The balls have m2 threads so they screw right into the axle brackets. They are a hair short going through the chassis plates- they don't make it to the nylon locking part of the nut, so I used loctite. If one comes loose, I'll grind the chassis a hair by the holes.

Just as much as my Specter:


Behind axle steering link. 2mm threaded rod with rod ends mounted above rear knuckle mount. The short link was replaced as well with rod ends that move more.

The shocks are losi mini desert truck front shocks with the spring perch removed. 10wt oil and about 10mm of a trekker/micro t spring inside. They are relatively inexpensive at $10/pr.

Looking great! Do you have photos of the truck flexing with the body mounted? Are those rc4wd Rok Lox?

[TownsendTdi]

Originally Posted by Aeronuclear

Looking great! Do you have photos of the truck flexing with the body mounted? Are those rc4wd Rok Lox?

Thanks! The body is being painted, I'll post a pic in a few days. Yes, the Rok Lox

[Sparks1337]

Nice work! What advantage is there in moving the steering link? I don't have that option any more as my knuckles are shaved.

[TownsendTdi]

Originally Posted by Sparks1337

Nice work! What advantage is there in moving the steering link? I don't have that option any more as my knuckles are shaved.

Nothing, just looks. Well, it does get hung up on rocks but nothing your axle won't hit too.

[TownsendTdi]

Originally Posted by Aeronuclear

Looking great! Do you have photos of the truck flexing with the body mounted? Are those rc4wd Rok Lox?

Flexy shots

[Aeronuclear]

Originally Posted by TownsendTdi

Flexy shots

Looking very good!! Colour is striking... Do the tires catch the body?

[gaz]

Originally Posted by Sparks1337

So, version 3 is here and I think I've cracked it

This time I've used 1.5x2x4 ballraces and a 48T spur/15T pinion for a 3.2:1 ratio, giving a final drive of 122.4:1. Bigger spur means there is room for the 180, but man is it a tight fit.

Top speed is about 3mph, but it has bags of power even on tickover and crawls really nice. Gear mesh is loads better this time too, it runs like a swiss fookin watch













Will try and get some video tomorrow.

Hi, just bought one of these and would like that set up you have.
Would you make me one? Obviously I would pay.
Not too far away from you either (Chesterfield)

Thanks for your time

[Sparks1337]

Hi Gaz
Not too far away at all

I'm not sure I can pull it off a second time mate. I bought all the bits to make a slightly improved version so I can try a few different pinions, but kinda lost momentum with it. Cutting and drilling the plates accurately is a ballache.

Also, until I strip this one down again I'm not sure I have the right pitch pinion for the transfer case - I used the one out of the stock motor originally and I only have one of those ;) It is definitely a coarser pitch than the 0.3 mod losi gears - I've bought a 0.4 mod 10T which I think is about the right dia but haven't tested it yet.

If I get it built I might be willing to part with this one though - and you're first in the queue

[gaz]

No worries mate,

Along with that I have a little update, as already known the stock motor is pants!
So reading this thread and winging it I set about modding mine.

I've managed to squeeze in a 180 sized motor now but I think it's a duffer. Also ruined the original pinion so....

What's a good torquey 180 motor and any ideas where I can get some pinion from?

Thanks, gaz.

[Sparks1337]

These are about the best you can get: Xtreme ESL506 180 PRO Motor (B) Gen 3 BLADE CX2 / CX3 / Esky Lama / Hunter / KOB | eBay
Pinions from here: kkpmo - M0.4 Zahnräder für Modellbauer bis 26mm aus Messing und Pom
I think it is a 0.4m 10T but not certain. Good luck - any pics of where you got to?

[gaz]

Not got any further yet, decorating and being moved to a cupboard to work on the rc doesn't help...

I'll get something thrown together before long though and put some pictures up.

[kennebell50]

Well its too bad this thing needs 20 hours of labor and hundreds in parts to be usable. They clearly subbed it out to China without making sure it was a good product before selling. I've been waiting a long time for a decent micro scale rig and it looks I'll be waiting longer. I've had a Trail Trekker for years that I don't do anything with because of how pathetic it is. don't have the time or need to put excessive amounts of money and labor into a micro toy.

[Shape_Shifter]

Originally Posted by kennebell50

Well its too bad this thing needs 20 hours of labor and hundreds in parts to be usable. They clearly subbed it out to China without making sure it was a good product before selling. I've been waiting a long time for a decent micro scale rig and it looks I'll be waiting longer. I've had a Trail Trekker for years that I don't do anything with because of how pathetic it is. don't have the time or need to put excessive amounts of money and labor into a micro toy.

While you are looking for your perfect off the shelf toy, remember that EVERYTHING is made in china.

Why are you on this thread? Why are you even involved in this hobby? Do you even know what a screwdriver is? Perhaps stamp collecting would be more to your liking.

[kennebell50]

Originally Posted by Shape_Shifter

While you are looking for your perfect off the shelf toy, remember that EVERYTHING is made in china.

Why are you on this thread? Why are you even involved in this hobby? Do you even know what a screwdriver is? Perhaps stamp collecting would be more to your liking.

I surely don't know what a screwdriver is, could you please tell me? The point is I have more going in my life than this as well. I work 50 hours a week, mountain bike, hike, train dogs. Excuse me if I wouldn't mind having toys without wanting to spend my entire day rebuilding one.