Finally RUNNING!! page 5 ride vids Here!! need better qualit

[etard]

You need these tires man:



Maxxis Holy Rollers. I actually rode my XC bike for a year with these, good enough for most terrain and very smooth on the street.

[Whiplash]

Yes I was looking at I really like I will be getting them next but I have to wait for mine to wear out first!

On another note I use the threaded portion of the side cover that carries the cluster normally to drive the chain ring and I used a threaded fixed cog epoxied with jb weldis to keep it from spinning off but on the way homefrom it came loose. Is there a better stronger e poxyfor this or should I simply weld it permanently? This was the only problem I had though, I am pretty excited! Luckily I still had the rear hub on it so I just swapped wires and away I went! Lol!

[sn0wchyld]

did you remove the paint off the hub/inside of the FW before gluing?
otherwise i'd try bolting on a plate to the outside of the FW, so when it tries to unscrew itself it buts up against the plate, in much the same way as it 'buts up' against the hub when under pedal power...

[Whiplash]

I was thinking of a plate behind the cog bolted to the side cover, then bolt through the cog to the plate, mechanically locking it. BUT, this is more time/money and im trying to keep this as inexpensive as possible...

[Whiplash]

Problem solved! Ill just get another cover if I want to change gearing.

[Alan B]

I knew there was a reason I needed a welder. Nice.

So, are the Z bends flexing at all?

In pedal mode the motor housing turns, as I understand it. How does that affect the feel of non motorized pedaling?

[Whiplash]

The Z bends seem fine, I have yet to be able to load it REALLY hard, but they have not budged at up to 1300 watts so far.

The motor is un noticeable when ding... Other than the super human power!

[Whiplash]

Hey all,
I got the cover back in and it works like a charm! I was able to really load it down now and get it to pull around 1400 watts and I think with this controller settings that's about all it will pull since that nearly stalled it. I had go run it in 3rd gear and climb halfway up a steep grass hill, stop, and then PIN IT from a dead stop to get that much load. Even in 3rd gear, it popped a wheelie carly easily! I did however notice that I need to cross brace the two halves of the motor bracket because it tries to twist when loaded that hard. It took it, bit I don't want to sell something like that because I am sure people will beat these things up! I also want to be able to turn the wick up a bit around 2500 watts so it will need to be more rigid for sure. It looks like the Z sections are holding well, I think its just trying to twist.

That being said, I am truly impressed how much torque the 12t MAC has at this power level. It has all but snapped the Walmart chain I am using in just the two rides! Its at least a quarter inch longer than it was, maybe more!! Looks like a high dollar chain is in my future! Lol!

[bandaro]

I'm away for a few days a look what happens, 2 extra pages!!!

Looks awesome dude, love the silence it was running in for that video, and can't wait to see the ride vid's. So the mac is far more efficient huh? do you think that's due to a better motor than the turnigy, of the lack or friction in the reduction gearing? It is interesting how it seems to be so much more efficient. One question I have though, I have always been avoiding hubs because they are heavy for the power compared to rc, but how does the power/weight ratio compare to your previous drive?

Also, it looks like you will need to lay some paint on that hub, if you can see the aluminium flashing past around the frame I imagine it could get rather dizzying... also you don't want to attract attention as you go along, not to the motor at least. Looks very nice, so hurry up with the video and full stats!

[Whiplash]

I have a feeling its more the fact that you can control the MAC better to be honest. The RC drive was very touchy, controllable but touchy.

As for the power/weight ratio, I think this one is about the same or maybe better overall, just not as jerky off the line which some might take as being slower but in reality I think its just as fast just smoother.

I am studying the design thoroughly right now trying to make it as good as I can before ordering up my first run of laser cut parts. I will likely get maybe 3-5 sets made for the first run just to see how it goes so ill post here and in the for sale section when im ready.

Barring any catastrophe I'll have climbing video this weekend!!

[Whiplash]

Ih yeah as for the paint, nothings painted yet, its a prototype! Lol!

[waynebergman]

Now we are talking Whiplash! .......I would like to see a climbing video. If possible it would be nice to see the bike climb something from a by standers point of view. Helmet cams are cool but it would be nice to see the bike actually climb, so a person could see the whole bike and rider in motion rather than the view from an on board camera. Any chance of an assistant taking the video of a short climb up something steep!

I am also wanting to eventually head down the mac mid drive route and my reasons are weight, low end power and silence so I am watching your thread with interest. Thanks for sharing your progress to date.............wayne

[Whiplash]

Yeah, I was going to do that, I am not a fan of the helmet cam to be honest, it kind of runs the perspective in my opinion unless you do different angles and such or a little of both...

in other news,
I got to work today on 6.2AH in BRUTAL wind the last 3-4 miles so its a HELL of an improvement over the in wheel hub. Normally in that kind of wind I would see in excess of 8AH consumed!! With the wheel hub, normally it would slow down but build heat trying to pull it, in this case I shifted down a gear, and it went about the same speed, but pulled it easily with about 1000 watts continuous rather than over 1600...

-Bryan

[Whiplash]

Had my first --EPIC-- Trail ride! I officially will never go back to anything but this!! I rode to work, charged up, rode home and stopped on the way and decided to try the trail behind our local Target store. Needless to say it ROCKED! EVEN WITHOUT the granny gear it still climbed effortlessly over trails only a hard core biker could tackle and they would have to kill themselves to do it!

Ill have video of actual climbing this weekend!

https://www.youtube.com/watch?v=qII-HHy ... ata_player

[Whiplash]

The best part is I rode from work over 10 miles, detoured through the mountains climbing at least 1000 verticle feet, up and down and around twisting trails, back on the road shifted into high gear and flew home another 3 or so miles on get this------7AH! It used to take 8 to get home on the STREET! LOL! Can you tell I'm pumped??

I took this trail here but veered off and went farther to the south at the top...

http://www.hiking-in-ps.com/bumpngrind.php

[sn0wchyld]

STOP IT DAMNIT! your making me want to buy a mac and play copycat! I think I'll get my 8085/100 build finished first but then I might just have to try my hand at a modded frame to fit a mac as a mid drive but im thinking more like 3-4kw from a 12fet.

Reaaaalllly want to see some running shots - even if its only a stationary camera showing a few steep climbs or whatever. please???

edit
what voltage are you running? I'm sure you've said already but cant find it in this thread from a quick look....

[Whiplash]

12s. Its the best compromise of size/power.. Ill try to get some video climbing tomorrow on the way home. Ill just set the phone up on a rock or something.. But remember, I still can't use my low gear and I use a mega range so it will do considerably better when I get it totally setup.

[Whiplash]

Hey all some vids for ya!!

https://www.youtube.com/watch?v=HxEDtZD ... ata_player

https://www.youtube.com/watch?v=WRcnfPo ... ata_player

[Powdersummit]

Looking great man, glad to see that your life is on the mend from the past few weeks. We have all been there in one way or another. Those are some impressive trails you have there. Hell I woke up to an inch of white crap on the ground this morning, doubt I'll even be out for a hike today. I really like how simple this setup is, considering how complex some people have made these systems. How is your front freewheel holding up to the torque? and how much range do you suppose you gained let alone ride ability from your old setup? I'd be real interested to see what that thing does with use of a decent granny gear. Keep up the good work and look forward to people copying your design.

Carl

[Whiplash]

Thanks! Its hard to guesstimate how much is range it gained, but it has to be at least 15-25%. Off road there is no comparison. Ii should have the bracket system for sale soon so hopefully if they copy my design they can use my system! Thanks again!

The real cool part I have noticed is when I pedal it makes a more significant improvement in the cower consumption, I am guessing its because its a mechanical link to the pedals vs me helping the hub motor in the wheel. I can actually cruise at less than 300 watts if I moderately pedal doing 30+MPH if there is no headwind !

[Tom Tom]

. Ii should have the bracket system for sale soon

Any idea what the system is gonna include?

Just received my 12t mac yesterday. Weighs in at 10 pounds. Although a little heavy? I love the simplicity
of a direct drive to the crank.

Which controller are you using?

I'm hoping to ride the peak in July. My newbiness is thinking a battery of roughly 44 to 50 volts and 25 amp hours would be plenty.

[Whiplash]

Yeah, if you keep the speed moderate that should be fine I would think.

As for the kit I am thinking a simple bracket kit then a kit with everything but motor, then one with everything complete.

[French]

I can actually cruise at less than 300 watts if I moderately pedal doing 30+MPH if there is no headwind !

That's impressive. If I'm cruising at 30mph (I don't really "cruise" at that speed as much as it's just a short burst), I usually pull 1200-1300 watts. If I help pedal, the best I can reduce that to is 1,000/1,100 or so. That's really cool that you can get that 12T to go 30mph, given that in the standard hub setup with 48v you'd be lucky to hit 20mph.

Edit: That sounds like a good set of combos. I might be interested in the middle package (all but the motor).

[Whiplash]

Yeah my MAC 6t couldn't do less than 900+ watts no matter how hard I pedaled or how light the throttle! I was amazed to say the least!

[recumpence]

You have something wrong with your numbers there.

Rolling resistance alone will take 300 watts or more at 30mph. Typically, you will pull 1,000 watts or over in an efficient system on an upright bike to run that speed. The highest efficiency systems I have ever seen are in low recumbents and those require nearly 800 watts to cruise at 30mph.

Maybe your shunt it bad or something.

Matt