Search found 158 matches

by jdevo2004
Dec 29 2014 5:19pm
Forum: Battery Technology
Topic: Holy grail of solderless 18650 is close but not idiot proof.
Replies: 54
Views: 12186

Holy grail of solderless 18650 is close but not idiot proof.

And that is why I am going to abandon this potential business project. However, my loss might be the communities gain. After about $500 spent on materials I have come away from the project with some knowledge that could bring about the holy grail of a relatively cheap, extremely strong and capable 1...
by jdevo2004
Dec 25 2014 7:35pm
Forum: E-Bike Non-hub Motor Drives
Topic: LightningRods mid drive kit
Replies: 4957
Views: 606211

Re: LightningRods mid drive kit

Torque (lb.ft.) = (HPx5250)/rpm. So at 3000 watts and 100 volts at 80% efficiency the torque at the motor would be ((0.8*3000/750)5250)/6700=2.51 If your secondary gear was configured at 12t to 80t the torque at the chainring would be ((0.8*3000/750)5250)/(6700/5/(80/12)) = 83.6 That is 83.6 foot po...
by jdevo2004
Dec 23 2014 6:16pm
Forum: E-Bike Non-hub Motor Drives
Topic: Great mid-drive battery pack
Replies: 2
Views: 740

Re: Great mid-drive battery pack

No weight or dimensional info. Ill pass.
by jdevo2004
Nov 25 2014 8:49pm
Forum: E-Bike General Discussion
Topic: Freewheel crank arms
Replies: 5
Views: 566

Freewheel crank arms

Hi, I am looking for some cool looking crank arms for my bike. Since it is an ebike, one side needs to be able to screw on to a freewheel. I do not care if it is ISIS or another type of connection BB. Does anyone have some links to different crank arms? I would love some light ones, but I am willing...
by jdevo2004
Nov 23 2014 7:30pm
Forum: E-Bike Non-hub Motor Drives
Topic: LightningRods mid drive kit
Replies: 4957
Views: 606211

Re: LightningRods mid drive kit

Why would you care what the winding temperature is? Copper will not melt until 1085 Celsius. What you should be worried about is magnet temperature. That temperature is more likely going to be the average temperature of the air inside the motor, maybe a few degrees Celsius more since the magnets are...
by jdevo2004
Nov 21 2014 1:16am
Forum: E-Bike Non-hub Motor Drives
Topic: LightningRods mid drive kit
Replies: 4957
Views: 606211

Re: LightningRods mid drive kit

Looks good.
by jdevo2004
Nov 04 2014 5:51pm
Forum: E-Bike Non-hub Motor Drives
Topic: LightingRod kit standard 09/2014 edition
Replies: 116
Views: 10844

Re: LightingRod kit standard 09/2014 edition

did you break those teeth off?
by jdevo2004
Nov 03 2014 3:08am
Forum: E-Bike Non-hub Motor Drives
Topic: LightningRods mid drive kit
Replies: 4957
Views: 606211

Re: LightningRods mid drive kit

Generally these motors can be built for different voltages with the same power rating. These motors are all rated for about 3000 rpm. The different voltages refer the the way the motor is built. Obviously lower voltage motors need to turn faster per volt to reach 3000 rpm while higher voltage motors...
by jdevo2004
Nov 01 2014 2:44am
Forum: E-Bike Non-hub Motor Drives
Topic: LightningRods mid drive kit
Replies: 4957
Views: 606211

Re: LightningRods mid drive kit

It is kind of cool that you are becoming the sort of unofficial supplier in North America for these motors. It is nice that North America can have a source that sells them one at a time without the hassle of minimums, duties and taxes. You should consider starting a professional market place web sit...
by jdevo2004
Oct 30 2014 12:15pm
Forum: E-Bike Non-hub Motor Drives
Topic: LightningRods mid drive kit
Replies: 4957
Views: 606211

Re: LightningRods mid drive kit

I just upgraded my entire front drive train with a new 36 tooth race face thick thin sprocket, a new 64 tooth kart sprocket and a new MRP S4 chain guide (without guard). It took a little bit of modification but it all fit and it works great! I never realized how much noise my other crappy custom cha...
by jdevo2004
Oct 28 2014 12:04am
Forum: E-Bike Non-hub Motor Drives
Topic: LightningRods mid drive kit
Replies: 4957
Views: 606211

Re: LightningRods mid drive kit

Hes telling you to make sure the threads are deep enough in the bottom bracket. If need be you can get them threaded deeper at a bike shop. Dont force anything.
by jdevo2004
Oct 27 2014 4:04pm
Forum: E-Bike Non-hub Motor Drives
Topic: LightningRods mid drive kit
Replies: 4957
Views: 606211

Re: LightningRods mid drive kit

You could potentially dremel out the bottom sheet holes to better fit around your BB. Problem is that once that is done, you will not be able to use those bottom sheets for any other bike because of the play it will cause for other bikes. For your bike it should work since the ISCG will be butted up...
by jdevo2004
Oct 25 2014 6:03pm
Forum: E-Bike Non-hub Motor Drives
Topic: LightningRods mid drive kit
Replies: 4957
Views: 606211

Re: LightningRods mid drive kit

I forgot about the jackshaft. I am noticing that the downtube brace might not be able to pivot back and forth much. That could be a problem with the way it sits on different down tubes.
by jdevo2004
Oct 25 2014 4:45pm
Forum: E-Bike Non-hub Motor Drives
Topic: LightningRods mid drive kit
Replies: 4957
Views: 606211

Re: LightningRods mid drive kit

Hey Mike. I looked over your design and I like the elimination of the bolts on either side of the jack shaft. Good job. I recommend that you do go ahead with the 10 gauge since the weight difference will be minimal (20% more weight but the sheets are so small that it is nothing) and there will be no...
by jdevo2004
Oct 25 2014 12:44pm
Forum: E-Bike Non-hub Motor Drives
Topic: LightningRods mid drive kit
Replies: 4957
Views: 606211

Re: LightningRods mid drive kit

Funny about all this pedaling talk. I bought the kit so I never have to pedal again haha. So far it has been working like a dream! My aim for gearing is to have to highest speed that I can in first gear while maintaining incredible climbing in first gear. Right now I am working to change my gear rat...
by jdevo2004
Oct 24 2014 10:25pm
Forum: E-Bike Non-hub Motor Drives
Topic: LightningRods mid drive kit
Replies: 4957
Views: 606211

Re: LightningRods mid drive kit

Look up torque vs power Gab. I am sure there is another thread on this message board devoted to it.
by jdevo2004
Oct 23 2014 2:11pm
Forum: E-Bike Non-hub Motor Drives
Topic: LightningRods mid drive kit
Replies: 4957
Views: 606211

Re: LightningRods mid drive kit

. I realized yesterday that we can double up on the upper sheets. That is, two sheets can be installed side by side on each side. That takes the metal thickness from .1046" to .2092". That's the equivalent of 5 gauge steel. Brute force enough for ya? :D I'll have to modify a few minor parts and the...
by jdevo2004
Oct 22 2014 12:28pm
Forum: E-Bike Non-hub Motor Drives
Topic: LightningRods mid drive kit
Replies: 4957
Views: 606211

Re: LightningRods mid drive kit

shhhhh. Big kids are talking.
by jdevo2004
Oct 22 2014 11:55am
Forum: E-Bike Non-hub Motor Drives
Topic: LightningRods mid drive kit
Replies: 4957
Views: 606211

Re: LightningRods mid drive kit

OK Mike, maybe you and I are talking about two different types of twisting. There is upper sheet twisting, and there is full kit twisting. The upper sheets are are designed to handle GNG loads, they are thin and not very well reinforced. They work with a 500 watt GNG design when they should work for...
by jdevo2004
Oct 21 2014 10:07pm
Forum: E-Bike Non-hub Motor Drives
Topic: LightningRods mid drive kit
Replies: 4957
Views: 606211

Re: LightningRods mid drive kit

8 guage is only 4mm or so...not super crazy. Of course you would have to get the part to me in the next couple of weeks. You know what they say....winter is coming.
by jdevo2004
Oct 21 2014 9:57pm
Forum: E-Bike Non-hub Motor Drives
Topic: LightningRods mid drive kit
Replies: 4957
Views: 606211

Re: LightningRods mid drive kit

You should be able to throw a design together like that one in a day since you already know all the dimensions of where the holes should be. Add one in to your next order from the metal shop and I will buy it off you to test it.
by jdevo2004
Oct 21 2014 9:49pm
Forum: E-Bike Non-hub Motor Drives
Topic: LightningRods mid drive kit
Replies: 4957
Views: 606211

Re: LightningRods mid drive kit

It comes down to geometry. If the geometry is wrong you waste a lot of efficiency trying to make up for it. I can get custom 10 gauge or even 8 gauge sheets made for you if you want. It won't even cost that much more. I'm not staying with 12 ga to be cheap. I'm doing it to keep the gross tonnage do...
by jdevo2004
Oct 21 2014 9:25pm
Forum: E-Bike Non-hub Motor Drives
Topic: LightningRods mid drive kit
Replies: 4957
Views: 606211

Re: LightningRods mid drive kit

eh. I like the idea of thicker upper sheets because imho the kit should inherently be able to flex a little bit. The point of the thicker sheets is so that the flex bounces back to its original shape rather than keeping a new shape that thinner sheets could do. Besides, it is a quicker easier less m...
by jdevo2004
Oct 21 2014 12:01pm
Forum: E-Bike Non-hub Motor Drives
Topic: LightingRod kit standard 09/2014 edition
Replies: 116
Views: 10844

Re: LightingRod kit standard 09/2014 edition

Emmayan take 2 new pictures of your bike, one on each side of the adjustment bolts on the lower sheet. I want to see where they are.