Is trying a 55t a waste of time (and motor)?

[rctoyguy]

I'm picking my truck up tomorrow, and the only thing I have to put in it for a while will be brushed - Tekin FXR. After lubing the worms (wow, never thought I'd use that phrase), checking the spacers, and breaking things in with a drill, would I still be wasting time trying a 55T?

[DBR]

Originally Posted by rctoyguy

I'm picking my truck up tomorrow, and the only thing I have to put in it for a while will be brushed - Tekin FXR. After lubing the worms (wow, never thought I'd use that phrase), checking the spacers, and breaking things in with a drill, would I still be wasting time trying a 55T?

The concensus seems to say yes. But, you could try to put a pinion in the 20s on it and plan on driving really slow and check temps constantly to find a happy medium. Or I could be talking out my @$$ and not know a thing;)

[miner mike]

All I had was a Novak 55 14t out of my axial ,It worked for now, Hav'ent run it much but it's not that slow.Heat was'nt a problem.

[Tacoma747]

I put a 55 turn novak in mine, just because it's what I had. Found a big pinion in my box, not sure how big, probably 25+. I found another that is 21 that I am going to try, whatever is in it now is geared too high. Good wheelspeed, but it won't crawl for crap.

[promatchrcr]

I'm going with rctoyguy today and I'm getting mine too, I'll be using a Goat brushless system for the time being any advice on gearing for it?

[Rthlss]

Originally Posted by promatchrcr

I'm going with rctoyguy today and I'm getting mine too, I'll be using a Goat brushless system for the time being any advice on gearing for it?

Losi says 18t, tried 20 tooth in mine, nice wheel speed but a little warm for my liking...

[ROCKEDUP RICKY]

Last night on the live show, Jay said a 35t would work. You just can't run for 30 40 min at one time. Try running 5 10 min then let it cool. This is a comp rig and not a basher.

[roksloski]

Does anyone practice for 5 to 10 min then sit down and let it cool off...
not that i know of........
when i practice, i can run it any where from 1hr to about 4hr's straight...
and do that at least 4 days a week.....JMO

and yes this is my comp rig..

[bustedcrawler]

Originally Posted by roksloski

Does anyone practice for 5 to 10 min then sit down and let it cool off...
not that i know of........
when i practice, i can run it any where from 1hr to about 4hr's straight...
and do that at least 4 days a week.....JMO

and yes this is my comp rig..

Yeah there are a few of us that practice in 5 to 10 minute segments, because when I practice I have courses set-up that I am running just like I would at a comp. Set up 2 or 3 at a time, then I will run followed by my buddy. Rinse and repeat as required. Now there are times where we play follow the leader for as long as the batteries hold out too.

[Dark8ngel]

While waiting for the havok 3s and wrong 21.5 motor I orderd to arrive, I thru in the fx-r and 55t novak out of my creeper into the losi.

I put on a 18t pinion and still had the fx-r programed for the creeper and ran it 10mins non stop on a 3s. climbed some rocks in the yard and did the 5' vert climb making it steeper each time and did this multi times. Nosed into the rocks and put under a heavy load and also ran it wide open around in 4" high grass trying to get the temps up.

Good wheel speed and good power.

Outside temp is 60 deg and after 10mins of hard running, motor temp was at 96 deg. Rear diff that still has all 4 shims in it was 76 deg. and front diff that has only the 2 recomended shims was at 67 degs. Diffs were re-greased and ran on a drill for 25mins each prior to testing.

If I just crawled the temps stayed in the low 70's, high speed thru the thick grass pushed the temps up.

Charge'n the pack now to full capacity to see what the temps will be on longer run times.

Also dialing out drag brake to see it makes a difference on temps.

[Dark8ngel]

To add...this is still stock out of the box, no weight added. Out of the box and stock the vert climb is amazing, the creeper could not even come close to climbing the same vert., even tweaked like it is.

[Dark8ngel]

update on novak 55t with 18t pinion, fx-r and cc bec.

Outside temp 60 deg.

Went to my normal crawling spot and ran it hard for 15mins and motor temp was 161 degs. so I shut it down.

Front diff with 2 shims was 72 deg. and rear diff with the 4 shims was 85 degs. I will drop the extra shims out of the rear and this may bring down the motor temp a tad, but not enuf to run the motor any longer than what I did.

If outside temps were warmer, run-to-temp time would have been even shorter.

[killswitch]

Originally Posted by ROCKEDUP RICKY

Last night on the live show, Jay said a 35t would work. You just can't run for 30 40 min at one time. Try running 5 10 min then let it cool. This is a comp rig and not a basher.

Ive been running fxr/35t/3s 1350 lipo with good results. 12 tooth pinion and a small cooling fan from a TC3 heatsink. Ran it for about 25 minutes (till I blew a CVD) and motor temped at 100 degrees. Good low end and still has wheel speed when I need it. I may try a diffferent brush/spring combo on the motor to get see if I can get a bit more botom end, but Im happy with the 35t reults. My buddy tried a 55t with a 2s lipo and it doesnt work very well. He has no wheel speed at all.

[duddits]

My Axial have stock gear and pinion powered by Novak 18.5 T with crawler esc. Enough power, wheelspeed and torque. Running time up to 1.5 hours with 1.800 mAh Lipo. (i= 1:55)

The Rock Force and also the Losi have a worm drive. The reduction is in the axle, that's the problem for the motors. I' ve tried many reduction combinations on the RF and think a total reduction of i=1:100 with stock worms is the best choice. (motor LRP 21.5 T with LRP crawler esc)

If I want the same wheelspeed and power like the Axial, I only can change the worms from 1:30 to 1:15 (high speed gears). Changing motor and/or spur and pinion led to no success.

In the Losi manual are different reduction examples and recommandations. I think the best choice is a brushless combo with 12, 13, 14 T. It allows a reduction from 1:71 up to 1:83.

A brushed motor with 55 T and a overall reduction of 1:55 is defenitely to strong. The motor have enough load, reduces riding time and overheat.

The compact Axial transmission have a long reduction, the transmission from the RF and the Losi doesn' t have it.
e.g. RF transmission 1:2 up to 1:3 !!!

If you wanna drive a brushed motor, choose one with 27 T or lower. The worms transmits enough torque and power to the wheels but they need high speed input.


regards, Juergen

[2500hdon37s]

my 55t on a 20 t pinion does ok its a ittle slow but it works as for heat it heats up after about 10-15 mins

[4x4transam]

my 2 cents to this, buy brushless, you wan't be happy with a brushed motor, I love my Novak Goat sytem with a 18t Pinion, might even got down a bit with the pinion, going to try a 17 and a 16, i have plenty of wheelspeed, just a bit cogging going downhill, hope the smaller pinion will solve that.

[gafracer]

i pick up the box set of the fifty-five with the rooster esc .put a 14t on

very slow wheel speed ?? and revs sucked none at all .not sure on the turns on this motor could be a 27 or greater wish i knew thinking 55t. not sure which way i'm going on a motor.

could i use my esc on a brushless motor ( rooster )

[Ralphy]

Use a Titan 21t EMAXX motor it will give you all the wheelspeed and torque you need while still being efficient with good run times and won't get hot until the 12-18min's straight mark after comp style running . You will be seriuosly impressed! I was. 15T pinion, with a 3 cell lipo required. Will pop wheelies without weighted wheels, will post video soon.

[Dark8ngel]

Originally Posted by gafracer

i pick up the box set of the fifty-five with the rooster esc .put a 14t on.......not sure on the turns on this motor could be a 27 or greater wish i knew thinking 55t......could i use my esc on a brushless motor ( rooster )

If you picked up the novak rooster crawler 55 combo, the motor is a 55 turn motor. And no you will not be able to use the rooster esc with a brushless motor.

[Tatau]

So as a general rule of thumb, a brushed 55t is reccomended for the axial ax10 for slow speed control, but for the losi with worm gears, a high speed, brushless motor is recommened? Im suprized the higher motor turn doesnt generate more friction in the worm and more heat, but the motor heat is the main issue of this post and the losi so im sure the build of brushless have no brushes to generate their own friction helps out alot. I wonder if in six months to a year with revised escs for brushless crawling, everyone will want brushless on their axials to compete with the brushless losi.