My HV Outrunner REVO
 

My Specs:
2x 4s 2500mah 25C Polyquest battery
Turnigy 42-60 500kv Outrunner
Kontronik Jazz 55-10-32

I am using a 18t RC-Monster pinion instead of the input gear. It is a really powerful setup, there isn't missing much for a complete front or backflip. The Jazz handles the Outrunner so nice, cogging isnt existing. I have runtimes up to 35min and the Jazz and the motor are both staying cool.

Here are some pics:

http://lh5.google.de/BrushlessPowere...s/DSC03345.jpg

http://lh5.google.de/BrushlessPowere...8/DSC03346.jpg

http://lh6.google.de/BrushlessPowere...w/DSC03348.jpg

http://lh3.google.de/BrushlessPowere...8/DSC03349.jpg

http://lh4.google.de/BrushlessPowere...c/DSC03350.jpg

If you cant see all 5 pics, here's the picasa-link: http://picasaweb.google.de/Brushless...xxasRevoSetup2

Sounds like an awesome project but the pics no worky. :neutral:

Looks good. Now we just need video to see this setup in action. That looks like a huge outrunner too.

Looks nice! I like th red chassis.

Are those 2x 4s packs wired in series for 8s 2500mah or parallell for 4s 5000mah?

The packs are wired in series for 8s 2500mah. You can also see the pics here: http://picasaweb.google.de/Brushless...xxasRevoSetup2

The red chassis is really nice, i bought the Revo as a roller from skellyo before Christmas. I'll make a small video soon, but here in Germany it is raining since yesterday evening.... :grrrrrr:

The Kontronik/Tunigy combo is really cheap but working so great that i'm thinking about buying a CRT.5 and convert it also using a Turnigy Outrunner and a Kontronik ESC. I've never had a setup that ran that smooth.

I like the idea, kind of like Sikeston34m's original emaxx trannys. What would you say your top speed is on this, and what is the motor kv? I may have found a use for my knotronik jaxx esc that I have. It is the 40 amp model and will handle up to 25v, so it would be a good 6-7s controller. I may have to try something like this, for my racebomb chassis emaxx.

This setup is not slow, check out the calc:

Differential Ratio: 2.8461538461538462
Transmission Ratio: 1.7222222222222223
Spur Tooth Count: 1
Pinion Tooth Count: 1
Total Voltage: 29.6
Motor KV: 500
Tire Diameter (inches): 5.75
Tire Ballooning (inches): 0
Motor Current Draw: 0
Motor coil Ω: 0
Spur/Pinion Ratio: 1 : 1
Total Ratio: 4.90171 : 1
Tire Circumference (inches): 18.06 inches (458.83mm)
Total Motor Speed: 14800 RPM
Vehicle Speed: 51.65 MPH (82.97km/h)
Effective Speed Rate: 1.74mph/V (2.8kmh/V)
Effective KV Value: 500

Definately not a slouch, thats for sure!

Yeah, it is really fast and powerful. I can't go full throttle longer than one second because my Crime Fighters are balooning so bad that i can't control my car. Does anyone know some tires that don't balloon that much? The highest speed my GPS recorded was 69km/h. Your Jazz 40 should work really nice with an Outrunner on 6s Lipo.

Could you tell me how you can use a Jazz 55-10-32 controller on a monster truck:surprised:???
55 Amps is not realy high, and you just use 14.8 volt.

Why all guys here try to buy top notch high amps controller like MGM 16018 if the little Jazz can run the revo.

And another question, can i use this little jazz with a Neu 1515 1Y on 4s li-po??????????

Actually, he's using the batteries in series for 8s, not 4s.

The Jazz 55 is quite capable and with 8s lipo (or 10s A123) it is able to push Truggys (see video in my signature) and monster trucks with ease. The Jazz 55 is speced at 65A burst for 15 seconds. It handles by far more when it comes to short impulses. I have quite a few eagletree records with amp spikes around 100A which translates to 2.5KW (on 10s1p A123).

Having 8s and 50A is comparable to 4s and 100A -> around 1400 Watt in both cases (when calculated with 3,5V per cell). With upping the voltage you won't need ESCs with super high Amperage capabilities.

On 4s the jazz 55 won't have the needed Amps for your Neu 1515/1Y (2200kv). On 8s lipo with a Neu 1515/2Y (1100kv) there wouldn't be a problem (this is the setup i will be running in the coming days as my Neu 1515/2Y arrived today).

Yeah - i am using the jazz 55-10-32 in an emaxx on a neu 1515 3d... another guy is using it with a 1512 2y ...

so othello - we can do a run - 1515 3d vs. 1515 2y:intello:

@BL-Power
>69km/h
No wonder your tires balloon like crazy. I already thought it must be speed demon with an ourunner spinning at 15000rpm without pinion/spur reduction.

@Mabu
Sure thing. It already would have been fun with my Neu 1512 setup.

Like othello and skellyo already said, i am using 8s Lipo and the Jazz can take up to 65A peak, i think nearly 2000w should be enough for a 9.7lbs Revo. :wink: If you want to use a Jazz on 4s Lipo, you could try a Jazz 80, it can take up to 6s Lipo and 100A.

Very Nice
 

Very Nice BL-Power! :yes:

I've always wondered how the Kontronik ESC's would handle an outrunner in a setup like this. You sound very pleased with it.

Tires that don't Balloon like that? Hmmmmmm...........the HPI Phaltline tires are a GREAT high speed tire, but they don't grip real well off road. They do stick on-road like glue though. The smoothest tire I've ever drove on. I did a few 65mph passes with them. The best I've found for high speed runs so far.

I've heard the Badlands are a pretty good all around tire.

I agree with your statement on the HPI Phaltlines. They are great tires. However, HPI doesn't seem capable of gluing them to the wheels they come "mounted" on, so you should glue them yourself. When I got mine, I actually pulled the tires off of the wheels and taped them up to decrease ballooning.

Oh, I like that setup alot. Tell me, how difficult was it to get the motor hooked up in the correctplace? Looks like the shaft slid through the front bearing, then you marked the motor mount fastening positions on the existing plate, and fixed it in place Im guessing the input gear for 2nd is retained and just fixed to the motor shaft in the correct place; any chance of a sneak-peak inside the tranny if its not too much hassle?...

I used the Phatlines on a few speed runs I made.

Thats exactly how i did it. It wasn't difficult at all, it took around 10min to drill the holes.

I am using a 18t Mod. 1 RC-Monster Pinion instead of the input gear for 2nd. It is working great.

Thanks for your recommendations! I'll look for some Phaltline Tires for onroad runs.

I'm glad you like it, i'll see if i can make a video today.

You can also convert the 18t input gear from the emaxx tranny to take a set screw and use it as a regular pinion. Some heat treating is necessay if you want to run on a hardened spur, though. I really like this idea, and may try it out in my racebomb. It has 1/8 diffs and sturdy driveshafts so it should hold up!

Howdy, could you elaborate a bit on how your actually driving the top shaft? is that like a custom shaft you have the motor, or did was original shaft on the motor long enough so you could just bolt it to the tranny?

Also, is that shaft supported on the other side of the transmission like a topshaft normally would be?

It's the original shaft of the motor, it's long enough to mount the pinion properly but it doesn't reach the bearing on the other side of the transmission.

Cool. Being a 5mm shaft should mean it will work fine without being supported at the tip, although I know Sike can make custom motor shafts that woud be long enough if it was ever an issue. With that motor mount though I doubt it will flex at all, very solid setup.

I love this idea. I think BL-Power had a stroke of Genius when he did this single speed tranny conversion.

It doesn't have to reach the bearing on the far end. The motor shaft is some very hard stuff. Great IDEA! :yipi:

Thanks, i'm glad you like it also. :yipi:
It's really durable, i was at the skatepark today and after 30min of running und some huge jumps and everything ran as smooth as before.

Hey BL,

I sent you a pm. Lincpimp and I are discussing some variations of this setup via email.

Is it ok if I post those discussions here in your thread?

You got a reply, of course it's ok! :yes:

We are some long winded boogers. I just didn't want to feel like I was hi-jacking your thread. Thank you.

Here's some input.

Hey James,

Thinking about finishing my bombproof racebomb emaxx. I have the 1/8 hybrid diff cases with the hb buggy (43/13) gears. I will run an old emaxx tranny as that is what the chassis is designed for. Looking at bl-power's revo conversion and liking what he did. So I am wondering what outrunner you think would be good to use. I use the gmaxx single speed conversion so a new motor shaft would not be necessary. He used a 500kv motor on 8s. I have a kontronik esc that is capable of 40amps cont and 7s. And I have enough lipos to do 7s. A 450kv motor would give me about 40mph with that setup. Sould I give the turnigy outrunners a try, or do you have a more suitable suggestion. This maxx would be about as heavy as the new emaxx, and wilth the motor directly driving the tranny input gear would be reasonably well balanced too. Watcha think?

Lincpimp

It's funny. We're both named James. :lol:

Here's my reply. Let me know your thoughts. How smooth does the Kontronik start this from a stand still?

Hi James,

BL-Power had a stroke of Genius when he put that Revo together like that. Building those custom 2 speed shafts the way I do is a Pain in the ASS. LOL

I just wonder how tough the single speed kit really is? He didn't talk about cogging on startup at all. I wonder if the Kontronik ESC is that much smoother in dealing with that little problem?

With my Direct to Tranny Conversion, it does and will cog sometimes when starting in 2nd. It's because of the LOW EMF pulses that are coming back to the ESC. Perhaps the Kontronik is capable of reading that lower level. I would like some more input on that from someone who has done some testing with it. I've heard alot of good things about the Kontronik line, but have never owned one myself.

I see what you're thinking and it's a great idea for an AWESOME setup. I know how to put together a combo like this that will BLOW the transmission quickly with the 2 speed setup. It's VERY powerful and only on 6S.

I don't have any experience with the Turnigy motors, so I'm only gonna talk about the motors that I know. Turnigy looks like a pretty good motor with a good price though. The only draw back that I see is, this setup puts alot of strain on the motor. On HV it tends to run hot. I like the motor with the turbine cooling fan attached.

By using the factory motor shaft, this opens up alot of possibilities.

Let's look at the Helicopter motors. Some of those will REALLY put out the Watts. You can also go with higher kv, since they are built tough and can take it.

I like the original Century 600, but they don't make those anymore. I have 2 of them, that I've managed to catch on Ebay. I'm working on a 6S conversion with one of those now. I just lucked out and picked up a full set of Ultramaxx metal transmission gears. The original 600's stator is a 3530 and is 715kv. It hauls ASS! I'll get some vids and do a posting when I have it completed.

Afterwards Century discontinued the 600, they came out with an even more powerful line of motors. The 600+ is one of them.

These aren't as cheap as the Turnigy, but most of the time, you get what you pay for. Look at each one of these motors. The two at the top are factory rated for 10S Lipo or more.
http://centuryheli.com/products/elec...?currentid=345

I have had a 600 +, I couldn't use it with my conversion because the motor shaft is a Press fit into the endbell. I couldn't get it out. But on an Electric Bicycle thingie I built, it hauled my butt to 28mph.

This is fine with the single speed conversion. To add some insurance to the motor staying together, I would weep in some Red or Green lock tight between the bearing holder and the stator, IF you can't see that it's full already. I would add a few drops of GREEN locktite to the press fit of the motor shaft and the endbell.

These motors are the Ultimate in my opinion.

With the 600 setup, I have seen some 60mph+ passes, but couldn't hardly control it because of the tire swelling. I want to try this on the Phaltline tires.

The two motors at the top of that page could power a speed record setup for the MT class. Your drivetrain must be VERY bullet proof though and you must use a light finger. LOL

There are other motors that will make powerful impressive setups. I'll be thinking about all the ones I've seen, and tell you about the best of them IMO.

James

When i go on the slowly on the throttle, the motor starts spinning but there isn't any cogging. I'll try to make video this evening or tomorrow that you can also see it. The Turnigy outrunner isn't running hot at all, after a 30min run, it has got around 125f. A setup with one of these Century outrunners and a bulletproof drivetrain sounds like a real killer setup, i think with the 800kv version on 10s and some Phaltlines you could easily reach 70mph.

So here's a short video just to show you that cogging isn't existing, even when i drive as slowly as i can: http://picasaweb.google.de/Brushless...87508891729186

Sweet, that is as smooth as ya like. I cant do that with my sensored inrunner system, so multipole outrunners have a definate advantage so long as the esc is good.

OMG! :surprised::gasp:

That's the smoothest I've seen!

Very Good! I'm becoming more and more convinced on the Kontronik line.

That's a different startup routine in the software. Works great!

Yeah, it's running really smooth, it think also this is because the Kontronik ESCs have a great car software and are choosing the perfect motor timing automatically.

Kontronik makes a really good controller. I hope the new Jive controllers will come out with the car mode.

I recieved my Integy diffcases, hardened gears and Maximizer diffcups today:

http://i32.tinypic.com/28th0gn.jpg

Yesterday i crashed with 30mph into the tire of a truck and it killed my RPM rear bumper, my wing, my wing mount and my rear body mount.... :grrrrrr:

Now i'm waiting for my spares from liquidrc....

cool
 

i have exact same outrunner :)
i stuffed it in a homebuildt car a little bigger that the pede with rwd and the outrunner coupled direct to diff tru a dogbone.. only testet on 5 cells so far, seeing that it can pull your big truck no wonder im only peaking at 17A in my truck :) gues i will put it in something bigger tires on it then :)
nice build

Those are some VERY nice diffs you have there BL!

Any updates?


Do you feel like your setup would work well with even higher gearing?

Your current gear ratio is 4.6:1 total.

I am switching my Direct Drive to Diff Revo from 4.3:1 diff ratio to 3.3:1 diff gear ratio. I'm hoping it will work without cogging.

I've also been thinking about buying a Kontronik ESC like yours. :yes:

I'm still waiting for my parts from liquidrc and i'm looking for someone who is interested in my CrimeFighters that i can order the Phaltlines. According to Brians calculator my total ratio is 4,9!? I think my setup would also work well with higher gearing. Is your motor cogging only when it is under load in your vehicle or is it also cogging if you let it spin freely?

I can only recommend you buying a Kontronik ESC, you won't be disappointed.

The stock Revo diffs are 2.85:1 ratio. The E maxx tranny in second gear provides a 1.72:1 reduction ratio. These added together comes to 4.57:1 overall reduction.

Let me start at the beginning with my build. It has changed and evolved alot since the start of it.

I set my Revo up Direct Drive to Diff. It doesn't have a transmission. I installed a AXI 4130/20 outrunner. It's a pretty big one. Using a Quark 125amp Monster Pro. I noticed it would cog about 50% of the time on startup from a standing stop. If it was rolling at any speed, there was no cogging. I was using the stock diffs with a ratio of 2.85:1.

This is when things began to change. I replaced the stock diffs with a pair of RCM's Revo diffs and went with the truggy gear ratio of 4.3:1

The cogging went away and things were looking great. I then rewound my 4130. Factory wind was 20 turns with a Delta Termination. The custom wind that I chose is a 4 turn Wye termination using 6 parrallel strands of 22awg wire.

I dropped so many turns because I wanted a higher kv rating. It is now in the 550 to 600kv range. The factory Delta wind was 305kv. I went with the Wye Termination because 8 poles are energized at any given time instead of 4 as with the Delta termination.

Wye has 1.73 times less kv, BUT makes 1.73 times more torque. This is the reasoning for the drastic change in the number of turns. I also raised it's amp capacity by using such large winding wire.

By adding AXI's motor fan to the endbell, it runs VERY cool and makes tons of power! I have some vids posted if you would like to check it out.

The Wye wind starts better. There is no cogging. but here's where the problem sets in.

The 4.3:1 truggy gears are spiral cut gears. The pinion tends to load the bearings as if they were thrust bearings. They can't hold this load since it isn't a side load.

In less than 2 packs, it will punch the inside race right through the pinion bearing. I know my shimming is correct.

I'm going to go back to the regular cut gears. They are 3.3:1 ratio. Still lower than stock, but my fear is startup cogging will come back with the Quark.

This is where I will probably go with the Kontronik ESC that you are using. It looks like it has a better startup routine than the Quark for this application.

I also like the fact that I can bump on up to 8S Lipo if I want to. :yes: