Recent content by slawek

This looks like interesting concept. If I am not mistaken this is next take by the same folks from Germany. I like this one much better, looks safer and more stable. http://www.dvice.com/archives/2012/06/sixteen-rotor-p.php

THE INVISIBLE BICYCLE HELMET Something interesting... http://focusforwardfilms.com/films/49/

It won't be that fast, because my boss bought CNC milling machine several weeks ago, and I spend my free time to learn how to use it.

Hi crossbreak I just have first bearings replace on small gear after 2550 miles, by the way I have check large bevel diameter - 81mm. I use only oryginal gear set, not all gear box. The only thing is that, the big bevel comes with front cover and bearings already. Everything else is made by me...

Thanks crossbreak Motor in swing arm is my next project I have made motor 80-85 mechanical modification and rewindening. This time will be 110 teeth rear pulley with custom bake disc 8,625" and 22 teeth on motor shaft, but is hard to find time to finish. Your are right about calculations...

Hi Russell If I were you I would think twice before buying battery from batteryspace.com. I build once pack 7S10P using their cells. Cycle life was very disappointing. In my case I think they overrated their product max current by 2 or 3 times. Basically I got ~150 cycles out of >1000...

Hi bobc I don't know what you have in mind, but if you want put them all on one bevel gear I can assure you, torque from motors will ground this little gear down. Form my torque calculation, I already overloading this gearbox during acceleration by 2 times on small motor like Hacker A60-18L...

Hi Mate I used gear set from grinder Dewalt D28499X Type2 Crown gear and bevel gear I purchase them from http://www.ereplacementparts.com/ Slawek

City commuter - I plan using the same frame from previous build with some modifications. I admit, I exaggerated a little goal :oops:, but I will do my best and we will see how it turn out.

2000 Miles on this drive – I think is time for report. 1. Battery pack 7S10P – almost died. From 40AH from beginning only about 20Ah left with significant voltage sag under load. BatterySpace.com over rated current (10A continuous, and 20A peak 15sec) at least 2 – 3 times. I wrote feedback to...

That was my first build: http://endless-sphere.com/forums/viewtopic.php?f=28&t=26699 Base on what I have learned during first build and experience from using this bike there is beginning of my second attemption. Under impression of silence of hub drive, this time I decided to try one stage...

Few years ago I was doing research on internet about this magnetic motor design. Found nothing specific about how to build. Only PDF patent document about magnetic occurrence inside this build. One thing for sure is that web side is a scam. They will take money and never send any documentation...

Just simple Hyperion EOS0720 charger. These parameters are suggested by charger, the same like for LiPo 3-4.2V, so I assume hyperion company know what they are doing. And who is everyone else? Maybe just You? look at the characterystic of A123 system, this is for cylindrical but, I do not think...

Hi guys It took me a little bit of time, but here comes a result from capacity tests. First, test conditions: Temp cells in range 75°F - 79°F (24°C – 26°C) Sensor attached to the side of the cell. Full charged cut off set at 3,6V Discharge cut off set at 2,5V Charge/Discharge 0,5C (10A) – These...

Hi miro13car, I read that thread by electricdirtbikerider, sounds close to mine experience . I put ruler on each of them and seems to be slightly bent, maybe a 1mm on their lenght. I think this is do to shipping and a little flexible trays, but i put them on desk and press them with force about...