Gearing Question??

[kerrywittig]

Away on busness for 4 months.......no RC with me, so I pickup an AXIAL RCR........Very disappointed with it's "crawling" speed. Lurches, very difficult to get it to smoothly start and stop, or go nice and slow with any real control. It has the stock spur and pinion....what would someone suggest I install to get it to be as controllable as one of my old large scale Nylints? I know that sounds strange, but the Nyllint was much smoother and "co-operative"...........By the way I am not looking for any high speeds, just a nice sloooooow crawl, comparible to the 1/6 Nylint in low range...Any input would be welcome! Kerry

[Reflection]

One of Johns handwound 540's would be great for that. With stock gearing,if your not looking for any speed,a 45t or 55t on 8 2/3 a cell would be a nice set up. It'll be slow,but you'll have good bottom end control. If you ever decide you want a bit more speed out of it,put a 3 cell lipo in there and it'll wake it up a bit.

My son's got a 55t geared 18/87 running a 3 cell and it's great on the bottom end but still has a little pep to it if a bump is needed. I'm currently running a 35t geared 18/81 on a 3 cell. It's a little more peppy but still has a good bottom end.

[yotachump]

Originally Posted by raptorman57

I'm currently running a 35t geared 18/81 on a 3 cell. It's a little more peppy but still has a good bottom end.

How easy is it to stall it?

[kerrywittig]

Originally Posted by raptorman57

a 45t or 55t on 8

55t geared 18/87

35t geared 18/81

You've lost me????????????

Is a 45t or 55t on 8............45 tooth gear on the tranny with an 8 tooth pinion?

Is a 35t geared 18/81...............35 tooth count spur gear on the tranny with an 18 tooth pinion? And what is the 81 all about?

In a 1:1 I would run say a 5:38 or 6:31 ring and pinion in the diffs and blah, blah, blah.........But this is new to me. Granted I have $2-3K in RC parts on the shelf @ home for a 1/6 build..and I still don't have enough experience figuring out what the RC vocabulary is!! And now here I go again with this Axial RC. Too much $ and not enough knowledge.......

[stevew]

45t 55t 65t (t=turn) motor it will slow things way down for you I put a 55t motor in my stock ax-10 and it crawled alot better

oh and a 65t integy is only $25ish so not a bad investment

[kerrywittig]

Originally Posted by stevew

45t 55t 65t (t=turn) motor it will slow things way down for you I put a 55t motor in my stock ax-10 and it crawled alot better

oh and a 65t integy is only $25ish so not a bad investment

OK, so 45/55/65 is the winding count on the motors armature, right?

And so is a higher turn count-65T better for crawling or a 45T?

In other words how do the number of turns equate to torque/speed(@ the wheels/smoothness?

Thanks everyone for the "instruction"!

[stevew]

alot of people are running a 35t with lipo so they have the wheel speed along with climbing power i runa 55t with a 7 cell split pack works good but with dig it dont turn as well as it would with more wheel speed

[NeXt559]

the rtr is actually marketed as more of a rock racer (whatever that means) than a crawler. replacing the stock 21 tooth pinion w/ the included 14 tooth actually has a huge improvement in trying to get a better bottom end. but like previous posts say. it would probabbly be good for you to pick up a 55 turn motor. such a huge improvement.

[Reflection]

Originally Posted by yotachump

How easy is it to stall it?

Well,I have stalled it many times if thats what your after A 35t will stall easier than a 55t no doubt. Knowing when it'll stall will help from getting it to that point. If it might be in a spot that'll stall it,before you get there....throttle it up a bit and bump over that Lower gears would help the stalling,I just can't do it though. I've gotten spoiled with running the pullers and I can't gear down now.

Originally Posted by kerrywittig

OK, so 45/55/65 is the winding count on the motors armature, right?

And so is a higher turn count-65T better for crawling or a 45T?

In other words how do the number of turns equate to torque/speed(@ the wheels/smoothness?

Thanks everyone for the "instruction"!

To get the ultimate "smoothness",you'll need to run a cobalt puller that John sells. You won't beat the butter smooth throttle of a puller. But,they are pretty peppy. IMHO,you won't beat a puller with any other motor. They will go slow with the best of them and light the tires up if needed. Best of both worlds.

I cut and pasted this from Johns site. Very helpful I think when a guys deciding on what turn motor he wants......



Motor speeds (taken from random and averaged sample @ zero timing & 3100rpm):
10t = 6526 rpm/volt
15t = 4317 rpm/volt
17t = 3753 rpm/volt
20t = 3216 rpm/volt
21t = 3082 rpm/volt
23t = 2790 rpm/volt
25t = 2588 rpm/volt
35t = 1565 rpm/volt
45t = 1210 rpm/volt
55t = 987 rpm/volt
65t = 837 rpm/volt



Thats RPM per volt. Running a 6 cell pack,you can see how slugish the motors will be.

55t on 6 cells.....7106.4 rpm's.
55t on 3 cells(11.1 volts)....10,955.7 rpm's.

35t on 6 cells....11,268 rpm's.
35t on 3 cells(11.1 volts)....17,371.5 rpm's.

Honestly,I feel a 65t is waaaay to slow,even a 55t is to slow for me personally. But,a 55t can be volted up and geared pretty good to perform nicely.

I'll stick with what I suggested above. With stock gearing (14/87 pinion and spur) a 45t or 55t would probably work nice for you. A bit slower,but can be volted up if you wanna get a bit more wheel speed.

[kerrywittig]

I guess I need to talk with John. He was very helpful when I was putting the components together for the still to be completed 1/6 build.....Ended up with a big boy Hyperion motor. I just need to get this thing to crawl, nice and smooth and super slow. At this point it just lurches when on a level floor. If I bearly squeeze the trigger it will try to creep, but the slightest pressure on or off and it stops or lunges. Way to fast. At this point it is useless as a crawler..........It would be great to have a chance to see, experience, actually participate with others that are into this hobby.........but NO one does this where I live and now it looks like 3-6 months on the road for now. Different city every day......today - Columbus, OH......Monday and Tuesday - Indy...............Wed.-Cincinnati, Thurs.- Detroit, 25 & 26 - Toronto...........and on and on........The Nylint was so simple and so smooth......but not very unreliable, with a weak drivetrain.......I know it sounds strange but the Nylint was very predictable and smooth.

[Reflection]

Originally Posted by kerrywittig

I guess I need to talk with John. He was very helpful when I was putting the components together for the still to be completed 1/6 build.....

John's probably the best you'll find for getting you the set up that works for you and your truck.

If your ever in east TN.,holler at me. Your welcome to stop by and try some of my trucks to see what they'll do/won't do. I've got 3 different trucks that vary in set up a little bit. Granted,they are probably set up a little faster than what your looking for,we can gear them down a little to let you try that.

[kerrywittig]

57........Thanks for the invite! That's exactly what I need to do......Get with someone and observe their trucks capabilities and also get even a few minutes of hands on. I am sure that I would get a much better idea of what needs to be done and how to do it.........Kerry

PS Any other volunteers out there in the US of A.........I'll be in your town soon......probably...........maybe!!

[bigflex]

A budy of mine has a RTR and with the stock mptor and a 12t pinion he seems to like the speed and torque combo. I haven't driven it first hand but watching him drive it, it seems to do ok. He loves wheel speed to though.

[robert97dodge]

I have one of johns 35T hand wound 540 motors on mine and I love it!!! I had the Novak rooster ESC and 55T novak motor combo first and I liked it too but now that I have this hand wound 35T it is 10 time better. I watch my buddies with there slow ass 55T motor and I cant believe mine used to be that slow. If you go with the HH 35T motor thought get ready to upgrade driveshafts, C, and knuckles at least.

[kerrywittig]

Again I will point out....................The speed (very slow) of the 1/6 Nylint in low range is what I am looking for very smooth, controllable and predictable.................SO.................... what might be the equivalent for motor, gearing for the Axial?.....................................

[NeXt559]

65 turn motor brushed!
11 tooth pinion
90 tooth spur

this should get your rig nice and slow and low end pretty predictable

but if you want to get more control after that, you should opt for a crawler specific electronic speed control. the esc is well worth the investment if you really want that control.
youll notice that when you put slight pressure of the trigger your rig will start shaking like it has parkinsons before it starts moving forward. the esc will eliminate this.

[kerrywittig]

Thank you NEXt.................