Me and My Axi-Maxx Video's!

[sikeston34m]

Originally Posted by lincpimp

Ok, looked at the pics and the 1.83 is going to be second gear. The 1st gear is a double reduction gear set, as opposed to the single reduction of the current gear setup in the tranny. So there are actually 4 gears, and 2 share the same axle, so the reduction is a bunch.

Plus it is not an auto shift, it requires a 3 channel radio to operate.

Looks like we will not have the killer 1.16 ratio for 2nd gear. Poo!

I guess that my ponderings were actually worth something.

Heres some pics

parts layout

cut away drawing

Notice the double gear on the rear gearset.

Well Poo!

I wasn't counting on a double reduction idler gear.

A 3 channel Radio isn't a problem. I use my rechargeable TQ3 for everything I run anyway.

I ordered the output gear package just so I could check them out and try to understand this setup, (before the description was posted).

There is going to be pro's and con's to this 2 speed kit.

Both output gears are the same tooth count, but look thinner and weaker than the single speed output gear. This also adds a drive dog, but it is somewhat smaller than the original tranny drive dog. The upside is, they do appear to be made from a better material, Delrin I believe.

This worries me. I had NO problem breaking the teeth that engage the output gears on the original drive dog. I have even stripped out the original drive dog hole that puts the spin on the output shaft.



Well Poo! It does look like I'm running in 2nd gear afterall.

The Wide Ratio set will make 1st gear like running a Rock Crawler, which could be fun.

I will still get the kit and see if it's tough or not. Hmmmm............The possibilities.............

With all of this being said, This still doesn't explain the pegs on the single speed output gear OR the sensor window in the tranny casing. Any ideas?

[JERRY2KONE]

It is too bad that you cannot just drop one of the original EMaxx two speed (metal)trannys in there with metal gears installed??

[Takedown]

How fast do you think it is with the single speed tranny?

[lincpimp]

Speed wise you will be limited by the largest pinion you can find and the smallest spur gear that will still allow decent gear mesh and some motor to tranny clearance. Looks like a 25/36 mod1 combo would be the minimum size. Which would give plenty of gear for almost all of the proposed setups.

Sike, what do you think the max rpm a 2826 axi can be spun up to? 15k - 20k rpm?

[lincpimp]

Originally Posted by MTBikerTim

Both links point to the same thing linc

Fixed that, thanks for pointing that out Tim!

[Serum]

I am pretty sure their initial plan was to use an opti sensor on that two speed.

What temps Sike? (ambient/motor/controller?)

[sikeston34m]

Originally Posted by lincpimp

Speed wise you will be limited by the largest pinion you can find and the smallest spur gear that will still allow decent gear mesh and some motor to tranny clearance. Looks like a 25/36 mod1 combo would be the minimum size. Which would give plenty of gear for almost all of the proposed setups.

Sike, what do you think the max rpm a 2826 axi can be spun up to? 15k - 20k rpm?

I have ran this setup on 6S. It runs really well on 6S too.

The motor being 920kv on 6S (22.2 volts), would top out at 20424 rpms. It makes a really high pitched whine at that speed, but it works very well. No problems.

I'm really thinking about buying the AXI 2826 8 turn. At 1130kv, it should pick up the top speed quite a bit. There is NO lack of torque. On 6S, this is going to spin up around 25,000rpms.

They seem to be VERY well balanced. I don't see a problem turning this kind of rpms. I'm going to let temps be my guide, and if I blow the windings out of one, I'll just rewind it anyway. LOL

[sikeston34m]

Originally Posted by Serum

I am pretty sure their initial plan was to use an opti sensor on that two speed.

What temps Sike? (ambient/motor/controller?)

An opti sensor huh? Could they be planning on releasing something else that takes advantage of this? If so, I wonder what it could be?

Ambient the day of the Vids was around 45 degrees.

The motor warms up to about 115. I can sense No heat at all coming from the ESC. The ESC is oversized, but very cool running.

I may swap out the Monster Pro 125 amp for a Brand New Quark 80amp that I have on hand. The 80amp is more than enough to handle this setup I believe.

The Lipo's might have been 85-90 degrees or so.

The setup isn't very stressed at this point.

The Motor fan is required however. Also, on the 10 turn, the stator poles are wound so full, I believe it is really limiting the amount of air flow the fan will pull.

There could be a difference in this area with the 8 turn motor.

[sikeston34m]

Originally Posted by Takedown

How fast do you think it is with the single speed tranny?

Top Speed is lacking at around 30mph or so. I'm going to be making some changes to take care of that.

I had to start somewhere on the gearing. I figured this would be a good place to begin.

It's VERY torquey, and on a short track, would hang pretty tough.

[ilpufxit]

Looks like you've finally got a toy and not a project. I think I need to order a couple large piles of dirt like yours. My poor yard is barren.

[lincpimp]

Maybe they will come out with a different tranny design. Lets hope so!

Time for my thread on my new emaxx.

[sikeston34m]

Well I finally got a chance to run my E maxx again. Got a few jumps in, ran around a little bit and the steering started acting erratic. It acted like the steering was binding. Sometimes it would turn and sometimes it wouldn't.

I disconnected the servo's and checked the steering linkage. Nothing is binding, it's turns VERY freely.

Looks like these "Water proof" servo's are NOT really all that tough. Anyone got any suggestions on some tough ones? I think both of these just stripped out. They don't have to be super strong, just tough, since there will be two of them serving the purpose.

I have a CC BEC set to 6.0 volts, but I didn't think that should hurt them like this.

[JERRY2KONE]

This is a new EMAXX right? Does it not have two steering servos installed? So are both servos destroyed?

[sikeston34m]

Originally Posted by JERRY2KONE

This is a new EMAXX right? Does it not have two steering servos installed? So are both servos destroyed?

This is the new E maxx. It has two of them. and both sets of gears are stripped.

I thought the Servo Saver was supposed to prevent this from happening?

This has never happened to me before.

[JERRY2KONE]

To start I would send TRAXAS an email just like you did here and ask for their support in the matter. We both know that they want to maintain their reputation, and this is not a good thing to have happening with their newest EMAXX product. Maybe it is a deffective batch of servos, or they may need to change the servo specs to accomodate the application. Kind of like a recall. That looks like a definite material failure/defect to me. I guess we are still going to have to upgrade the steering servos to the hi torque type on our own to keep up with the vehicles pounding. Keep us informed of what they tell you Sikes. Thanks for the update.