Animalhippie's Micro Scaler Adventure

[AnimalHippie]

I was looking at the rc4wd R5 1/18 transmission. It's 5.5:1 ratio. Anyone tried one in their micro? Would that be going in the right direction as far as the speed to match up with the rc4wd axles? I definitely don't want a fast rig.

 

[Brake Weight]

The Barrage is 5.8:1. Not much different from the Gelande.

 

[AnimalHippie]

The Barrage is 5.8:1. Not much different from the Gelande.

A little cheaper then the Gelande one. Too bad I can't find any dimensions for it. Guess I just need to bite the bullet and order a trans. So I can get this thing going. Only have a couple bucks into this rig. So what's $22 for a trans. Just wanna make sure I get the right one for the job.

 

[Brake Weight]

A little cheaper then the Gelande one. Too bad I can't find any dimensions for it. Guess I just need to bite the bullet and order a trans. So I can get this thing going. Only have a couple bucks into this rig. So what's $22 for a trans. Just wanna make sure I get the right one for the job.

Check out some of the Spoo76 threads on various brands. Some of them were geared slower than the Barrage and Gelande.

 

[Xrayray]

The Barrage is 5.8:1. Not much different from the Gelande.

Huh interesting. I thought people were raving about the Gelande v2 transmission. How did you get the overall ratio for the Barrage? I counted the gears: 16t. 32t. 17t, and 40t.

 

[Brake Weight]

Huh interesting. I thought people were raving about the Gelande v2 transmission. How did you get the overall ratio for the Barrage? I counted the gears: 16t. 32t. 17t, and 40t.

Yep. My notes were wrong. I only had the spur and pinion there. Not the actual final output. 64t spit and 11t pinion.

 

[chevy55]

I wouldn’t bother with any of the available transmissions in the micro market today unless it’s a sumo or hbx.
I have had good luck with with slowing down fast axles with https://www.pololu.com/product/3474 & a home made t-case from some 32p or 48p pinion gears. I always swap the motors out on the gearhead to a 130pn can with neo mags or a 180 xtreme can. This route ain’t cheap but it gets the job done with tons of torque & plenty of wheel speed on tap "thumbsup"

https://vimeo.com/54210920

 

[Xrayray]

Yep. My notes were wrong. I only had the spur and pinion there. Not the actual final output. 64t spit and 11t pinion.

I've been looking for a math formula but I just don't get how to do it.

Hippie, you could try to get a CR 24/transmission, but the gears are OOS at asiatees right now.

 

[AnimalHippie]

Spoo has helped me a few times before. I'll have to check out his micro builds. You guys talking all those numbers made my head spin. :lmao: I know my way around fabrication of things, but I'm new to the hobby and building a parts bin style rig. I didn't even think about all the gearing and ratios till chevy55 had mentioned it. So glad he did cause I woulda been pissed having a fast rig after fabricating everything and putting it all together.

Chevy55: that rig is nice! Do you have a build thread on it? Do you mind grabbing some links for me on those setups? I've looked at so much different stuff for this trans stuff my mind is going dumb. I'm not after all that wheel speed by no means. Good torque with some wheel speed is all I need. Not trying to run comps or anything. My girls like driving the micros more then the 1:10 rigs and I like the challenge you get driving them. Anything can be an obstacle.

Thank you guys for all your help and info!!! "thumbsup"

 

[Brake Weight]

I usually mark the spur and put a mark on an output shaft. Count how many rounds of the spur to get a round or two from the output shaft.


The RC4WD tranny as a 5.5:1. 11 rounds on the spur would get 2 rounds on the output.

 

[AnimalHippie]

I did that with the Losi trans. 2.53:1 is the ratio. Hooked up the spin motor to the xcelorin 1/36 brushless ESC. Used the gear I got out of a servo for the pinion. Everything seems to work good. Once I get a chance I'm going to throw that trans, motor and ESC in the micro comp crawler and see how it does. I'll probably shoot a video of it so you guys can see how it does.

 

[Brake Weight]

Ka chow.

http://www.rccrawler.com/forum/losi-micro-rock-crawler/423029-finding-final-drive-ratio.html

More data.
http://www.rccrawler.com/forum/losi...-speed-gearing-calculator-ive-been-using.html

 

[AnimalHippie]

stupid questions. Is this a stock motor for the trekker? Will it handle 2s?

Is it worth putting connectors on? Thinking about setting up a stock chassis with the Jeep body. so the girls can drive it around till I get my custom frame done for the scale axles. Finding the links being super short isn't working very good for articulation. 90mm WB with 29mm links stock chassis and axles. Probably need to get some super small all thread and micro rod ends. Time for more research I guess