This should be enough power!
 

Hey Guys!

Check out the new AXI 5345 I just picked up off Fee-Bay new in box for $180. :mdr:

This is not for a monster truck project, though. It is actually for an E-bike conversion I am building. But, I thought I would show it to you guys.

This thing is rated at 93% efficiency at 50 amps and is capable of 4000 watts continuous and 6000 watts peak! Not bad for $180.

I have a smaller AXI in a scratch built truck and I love it. If this motor proves to work well enough in my E-Bike (should be a rocket), I may have to pick up another and start a truck project based around this motor.

Matt

that's nice.. 93% @ 50Amps.... hwo many cells can it do..?

What's its kv? I know it's going to be 225, 195, or 171. I too am curious what voltage you'll be running.

Hmmm. 4kw at 50A would be 80v. 21s lipo or 66 NiMH cells or 24s A123s?

It is good for 12S. This motor is 225 KV.

It is rated at 4000 watts continuous. At that 4000 watts, the efficiency drops to the high 80s. Still it is ggod for 2500 watts at that 93% efficiency.

At 6000 watts, the efficiency obviously goes down.

I will be running 12S 10,000 mah through a HV110. :)

Should be fun!

Matt

what is the advantage of running 12s in this system rather than 5s on a 2.5d?

i just probably first ask what kinda truck its going in?

It is going in an E-bike.

12S will give the most power.

I have a similar AXI in a scratch built truck on 6s and it is fantastic.

Matt

o dang.

a dirtbike or what?

how do they not fall over? ive always wondered about that.

Two things: the gyro effect (a spinning object resists a change in lateral direction) and centrifugal force.

pics ot the bike??? I don't think t-maxxracer gets that your talking about an actual bike. You're talking about a full scale bike right? The rider should help keep it up:lol:

theres no way that little motor could power a 1:1 bike... or so i wouldnt think.......

What is it they say? "Size doesn't matter?" (It does make at least a bit of difference, by the way).

Yes, this is for a full size bike, a recumbent.

A typical man has the potential energy of roughly 200 watts oof power in his legs. This motor is capable of 4000 watts continuous. If you do some E-bike research, you will find that typical E-bikes run about 400 to 600 watt motors and those motors are 40% to 60% efficient. This motor will put out over 5hp continuous. That is more than a 50cc scooter.

Anyway, I know this is an RC forum. I didn't mean to confuse anyone. But, I figured you guys would get a kick out of it because I am using all RC equipment for this project.

Matt

Sweet project keep us posted

holy crap that is insane. so this will be like a small pit bike? its just amazing to me that you will actually be able to sit on this thing and drive it around!:gasp::surprised::surprised:

how fast do you think it will be able to go?

Finally a motor that is powerful enough to put in my mini t:lol::party::na:

Thats crazy! Will be interesting to see what happens, I always wanted a E bike or something, but all of them out are powered by some sissy motors...... I want to burn rubber LOL..

Will this bike be remote controlled or will you actually sit on it?

It is a full size recumbent (actionbent midracer).

There are a bunch of E-bike forums that have spread sheets on them to calculate run time, distance, and top speed. Believe it or not, the top speed predicted by the spread sheets is 73mph at 4000 watts and 82 mph at 5000 watts. :intello:

Anyway, this bike will be geard for 55 mph. I highly doubt I will want to go any faster than that!

Oh, with 12s 10,000 mah, this thing should go 30 mph for nearly an hour on a charge!

Matt

I want a BL street kart, but a off road kart would be awesome too....... But who knows what you would do for batts lol....

A bike would be sweet, could you pm me, or post some links to those sites?

Im guessing you will be using some kind of servo tester as the throttle?... I've always been interested in those- my lazer 6 radio has a dial that is used to control one channel (wing flaps on a plane), but it could easily be used as the throttle channel, like a cruise control feature for constant speed.....

Yes, I will be using an Astro Flight servo tester to drive the ESC.

I will post some links for you tonight or tomorrow.

Matt

Still Waiting for those links Matt-- LOL
 

Matt
That motor is a generous helping of power -- without a lot of legal tender out of pocket. :great:
As far as those links go, can you post one or two about the E-bike forums?


Got any more photos?
N

I would use some sort of kill switch so if you some how fall off the bike or crash the bike will be cut of power

You should put training wheels on the bike, use a receiver, and use a servo for the steering. That would be hilarious watching a push bike go down the street with no rider. Imagine the looks it would get :rofl:

Hey Nic! Great to see you on this board! I think everyone here knows who you are. :mdr:

This is the place to be for brushless info, that's for sure.

I do plan to have a safety on the bike, maybe a tether cord or someting.

Matt

Fun
 

WOW:gasp: that looks like it would be a lot of fun to put in just about anything. My 12 year old son has been wanting me to build something that we saw in a car show, and that motor would be perfect for it:yipi:. It is a beer cooler on wheels that the driver rides around the car shows on handing out beer to his friends. His only goes about 10MPH though:whistle:. I bet this thing would do much better. Please keep us informed of how this works out for you. It really is interesting:yes:. Thanks Guy.

This is true, but has anyone noticed, that all human powered vehicles are overdriven (basic transport, not hill climbers and such). I noticed it once helping assemble a bike for a nephew, the ratios we use with our legs would be considered overdrive for most mechanical vehicles. I know weight does work into it, but just saying its impressive what the human body can do.


Nic Case, Welcome to one of the best (if not the best) forums around. you're knowledge will add to this site

JERRY2KONE

Did You mean something like this..................LOL
You can make a "Chopper version" & go really Fast.......

Cool Stuff.
 

How funny is that. It looks a lot like the one we saw in California last year, but the one we saw was baby blue in color that matched his show truck. But yes that is what I am talking about.:lol: I was thinking about it on my way home from work after posting that thought, and it occured to me that maybe having my 12 year old doing more than 10MPH on a beer cooler might not be such a good idea. Of course it would probably be the first beer cooler that requires riding gear and a helmet:rofl:. I do believe that it is a project that we will take on when we arrive at our next post in the fall. So that AXI motor might be just the power source that we need.:whistle:

there is actually a 150watt 380 sized motor in that thing;
which means more room for beer..

Beer??
 

Did someone say BEER? I was thinking that I have to set a good example for my son, so it will have to be Rootbeer in that cooler:lol:. Wow only a 380 size motor in that thing. I guess it is all in the gearing now isn't it? With something like that AXI installed, and with the right gearing in it that thing I bet it will probably pull wheelies and move pretty well. I am looking forward just to getting to the build when the time comes. Anyway I still have 3 other projects to finish right now, before I even start to think of starting another one. My wife is already asking me when we can go racing. So I need to get hot.:whistle:

You son should be fine with 2 liters of water each day, this would leave more room for a bolder setup..

It's either going 50MPH, or he's carrying around an awful lot of beer..

True That.
 

I like the way you think Serum.:lol: You know how kids are. If we make a riding vehicle that goes more than 30 he will freak out, and want to show it off to all of his friends.:intello: I want him to have fun, but I want him to see adulthood to.:whistle: I am sure that whatever we may come up with, it will be the coolest thing he will ever see as a kid. Making a project with your Dad is always the best of memories if you have that chance.:yes: So what happen to our E-bike builder? Is it done yet?:rofl:

I haven't begun machining parts for it yet. I have been collecting everything I need. Plus, my TXT project is eating up time.

My RC4WD aluminum axle housings came in today. The machining quality of those things is crap. Plus the are barely hollowed out. They weigh a freakin ton. I will chuck them into my mill and hollow them out as well as do some decorative machining on them. They will be sweet when they are finished.

The E-bike is next on the list.

Matt