My application to be part of the M.E.N.S club( 2kW Big MAC )

[Miles]

Yeah, there are a few China trading sites with that image. Then some where they are using this gunmetal gray can that looks super burly. Then there's the black thing with the silver top, pictured earlier in the thread.

The reason I posted the picture was to illustrate what the motor looked like without the stupid cover.

[neptronix]

Damnit, you are right Miles

http://endless-sphere.com/forums/viewtopic.php?f=30&t=25477

^-- see pictures of the BMC 1500W motor epoxy thread here.

[Miles]

[Tench]

This motor may lend it self very nicely to a mid drive through the gears, it may not be quite upto running a single speed and having good low speed torque, only testing will give us the info on this. As i have just built a nice mid mount through the gears with a 6-7kg motor and i am quite advanced in my design process for a build using the ME4201 i am going to stick with the original plan for a simple nice clean single speed midmount.
I shall keep upto speed on your experience with this motor Nep as it could well be the motor of choice for a geared mid drive taking up less space than the hub alternatives with possibly a bit more power. This could be the start of a mid drive revolution

May the 4th be with you!

Simon.

[sn0wchyld]

Oh sweet baby Jesus. I got an email back from the China MAC dude. I thought he was brushing me off too. We are in the middle of discussing various details now. But i gotta get up early tomorrow, so i need to catch some sleep.

TTYL folks, and BTW i would still like to hear your reasons why you want to escape the hub motors. I gave my reasons. I wonder what yours are, and what the plans are...

1 very big reason why i'm ditching the hub asap... offroad. I've got a steel mx rim and 2.75 inches of rubber on my ht motor - and its already got some big dings in the rim, so much so that it's impossible to get 100% true (atleast for my homebrew skills)... and I'd hardly call myself a 'hardcore' downhiller. Added to witch riding offroad with ~12kg of unsprung weight means shit suspension performance + the 17" rim is too small - but going to a larger one means more weight, cost and a reduction in hill climbing performance.

Dont get me wrong, hubs have their place, but I dont see it being on many hardcore offroad bikes. I'd love to try a stealth and see how they manage the weight, but even then I'd be amazed if they'd outperform a similarly spec'ed & developed mid drive.

Ok... 22lbs is not nothing, my favorite daily use bike is stock at just 24 lbs, 22 with trimmings removed before conversion and with approx. 20mi range @ 30-35mph weighs in at a whopping 36lbs.
so that makes my entire blur just 14lbs over the motor discussed here alone.
Not that there isn't a place for heavier bikes and/or motors, not that moving away from hubbies is a bad idea... Just some perspective

lol. My bike weighed in at 44lbs before I added anything at all! now its up around 80, with ~50km range and tops out at 40mph.

[neptronix]

K dudes. Just thought i'd provide an update on the MAC motors.

"The 2 motors will be done in a week. After they are done, we will send them to you via SAL ASAP."

I guess they build to order on demand.

Anyway, i have a few other projects on the board anyway:

1) Do R12 mod on the eb3 controller for higher voltage regen.
2) HP server power supply isolation tutorial.. there is no step by step or pics of the process on the 'net.. and lots of people ( including myself ) have been looking for big 24v power supplies on the cheap for the hyperion 1420i.
3) Hill testing with the peak power once #1 is completed :]. 'bit scared to do the 1/3rd scale pike's peak climb test until i got regen, 7% continuous grade with a 240lb rider on a 60lb bike, you do the math

Hopefully this keeps me busy for a while, but i am anxious and feel like just flat out ordering a motenergy motor tomorrow.. .. fighting..the..urge..

[neptronix]

OK DUDES.

Finally got ahold of cell_man, and he does want to work on a one time sale. Shipping would be direct out of China. You would deal with me and he ships it out. This would make for the best possible price. That is how it would work.

I am still waiting for the motor before further action is taken. If it does not perform up to expectations, then i do not want to initiate the buy and have you all sitting on a bunch of useless lawnmower motors .

I think it will be another week and a half or so before i see these motors.
This is a hard wait. Part of me wants to order the motenergy right now so that i have something to play with immediately.
The need for speed.. never goes away..

[neptronix]

By the way, i was hobbling around in wal mart today, and think i came up with the PERFECT motor mounting plate..

http://www.walmart.com/ip/Springfield-Seat-Swivel-7-x-7/17800737





Seat swivels for boats.....!
Think about it.. 2x 1lb steel plates with a nice round center..

+ punch out the nut/bolt/doohickey that locks them together, to seperate the plates.
+ bore out the hole in the center of one plate, so that the motor shaft fits right through it.
+ drill holes to match the motor's mounting points, and mount the motor up to 1 plate.

What you do with the other plate depends on where you are mounting it.. you can use some long metal tubular spacers or pieces of thin pipe to sandwich the motor between the two plates and have something that could easily be stuck in the triangle of a bike or elsewhere, with some additional hardware store pieces..

Or you can use the additional plate as a chain guard for your legs, since i believe these motors have pretty long shafts.

This could work for the MAC motor or the motenergy just as well. I am sure their diameter is not too large.

[jkbrigman]

OK DUDES.

Finally got ahold of cell_man, and he does want to work on a one time sale. Shipping would be direct out of China. You would deal with me and he ships it out. This would make for the best possible price. That is how it would work.

I am still waiting for the motor before further action is taken. If it does not perform up to expectations, then i do not want to initiate the buy and have you all sitting on a bunch of useless lawnmower motors .

I think it will be another week and a half or so before i see these motors.
This is a hard wait. Part of me wants to order the motenergy right now so that i have something to play with immediately.
The need for speed.. never goes away..

Hey Nep - talk to me, I'm still with you on this. Do you need another roll call?

[neptronix]

As soon as i get them in my hands, verify some stats like weight, dimensions, rpm per volt, performance, etc. I will do a roll call in a separate thread, which i will link to here.

I think i can get a more accurate show of hands when we all know more about the motor.

If i just wasted a bunch of money ordering 2 motors sight unseen, i do not want to pass on the disappointment to a dozen or more people

I've already been the guinea pig a few times, lost many hundreds of dollars doing it, but alternately, was also able to recommend some stuff that once i started talking about ... suddenly a ton of people had one within a few months.

Sorry that this thread is such a cliffhanger, guys. Am real antsy over here myself.

In the meantime, i'd love to see some of what you guys are building ( if any ) as a first attempt at going chain drive.

[sn0wchyld]

As soon as i get them in my hands, verify some stats like weight, dimensions, rpm per volt, performance, etc. I will do a roll call in a separate thread, which i will link to here.

I think i can get a more accurate show of hands when we all know more about the motor.

If i just wasted a bunch of money ordering 2 motors sight unseen, i do not want to pass on the disappointment to a dozen or more people

I've already been the guinea pig a few times, lost many hundreds of dollars doing it, but alternately, was also able to recommend some stuff that once i started talking about ... suddenly a ton of people had one within a few months.

Sorry that this thread is such a cliffhanger, guys. Am real antsy over here myself.

In the meantime, i'd love to see some of what you guys are building ( if any ) as a first attempt at going chain drive.

You can check out the D8 build link in my sig... not much to get excited over though, and porbably another month or so off being complete. its a 8085 running though a 5:1 PLE80 planatary gearbox to the cranks. Should provide a bit of chain snapping fun untill I decide on building something better!

[neptronix]

That's an interesting build so far. Looks ideal for running 2 of those motors in parallel

Well, finally got a tracking #. Bout time!
Got a RPM metering device, so i can see what this motor actually does..

And now... the waiting game

[neptronix]

Yeah! my motors are in Los Angeles, CA right now. Going through customs.

Gonna give the 20" magic pie bike a few rips around town as a final goodbye. The silver Trek that the 'pie occupies will be the home of the new motor anyway.

USA customs shouldn't take too long, i'm sure i will have this motor in my grubby little hands by the end of the week

[jkbrigman]

Yeah! my motors are in Los Angeles, CA right now. Going through customs.

Gonna give the 20" magic pie bike a few rips around town as a final goodbye. The silver Trek that the 'pie occupies will be the home of the new motor anyway.

USA customs shouldn't take too long, i'm sure i will have this motor in my grubby little hands by the end of the week

When you get that puppy, tell it all, tell it all! Inquirin minds wanna know!

[neptronix]

Oh yeah, most definitely.

Well it's still in customs, they're taking their sweet time. Not getting it this week, i think

[nechaus]

I think you should just get an Agni..

[neptronix]

Okay, looks like i am getting the two motors today.
But due to personal issues, i won't be able to test them for a month.

I think it is bogus to leave you all on a cliffhanger, so... is there anyone in the USA who is able to do some tests on one of these motors, IE measure the RPM at different voltages, hook it up to a bike, see what it can handle, etc?

If so, i can sell it to you at cost.

[Tench]

Nep, how much would it cost to send one to me in the uk? if it is not to extortionate i would be interested in having one to test.

[neptronix]

The eagle has landed.

[John in CR]

Damn Nep, I didn't realize you were that young.

[neptronix]

Tench, would probably cost half of what i paid per motor ( plus china shipping ) or more!

If this motor works out, you would be able to get one shipped direct to you from China at a good rate

Anyway looks like it has standard colored phases ( blue, yellow, green ) and a hall sensor connector just like what comes on our bikes, but the colors on the hall sensors are very different so i'm a little nervosa about firing it up and sending voltage to the halls the wrong way. Gonna bug cell man first, haha.

[neptronix]

ok, here is the 'motor tech' thread on this "2kw mac" motor:

http://endless-sphere.com/forums/viewtopic.php?f=30&t=40166

[neptronix]

Allright, so i ordered the motenergy 0421. I am aiming to become vice president of the m.e.n.s club.

I've still been poking at a good way to drive the rear wheel. Disc brake seems to be the best way to do it, but these bike hubs seem rather weak.. can they really handle 10 horsepower or above? O_O

What's stronger?

[thepronghorn]

Think of what a bike's disc brake mounts are meant to do. They attach to a brake disc that will be used to stop the bike from high speeds in a short time. Chances are that your motor's torque will not exceed that of the brake when it is being used at full potential.

[neptronix]

Think of what a bike's disc brake mounts are meant to do. They attach to a brake disc that will be used to stop the bike from high speeds in a short time. Chances are that your motor's torque will not exceed that of the brake when it is being used at full potential.

We'll see i guess.. if they can hold up to 20-30 horsepower. If not, i will have to start getting into motorcycle componentry i suppose.