Recent content by Achim

spinningmagnets, They improved the design since then and produced a motor which spins over 1'000'000rpm!

I've got a small model of a stirling engine which I put behind a A4 Fresnel lens (got a bigger one though).The principle is so simple! Here's a vid (please excuse the bad video quality): GdRAnb3kg9E

I always dream about building my own solar stirling generator, because they're much more efficient than solar panels in direct sunlight and relatively simple to build. I also thought of a large fresnel lense or a satellite dish mirror tracking the sun, so the focusing spot would always be on the...

solarbbq, Downhill doesn't count. Anyone can theoretically do 100kmh downhill even without motor ( if they aren't too scared :))

Doc, Same from Switzerland, It's 23:00 here but I'll stay up until you have uploaded a video!!! :D

Today I did 59kph on the flat thanks to the delta wye mod I did to my 9C, using the 48v 10Ah battery from ecity!! Yehaa, I love the speed! :D And the battery held up to it! Was just warm after 10min full throttle, starts and stops, but the controller was hot! Great to see you here Jack!

Seems like not everyone was as lucky with their battery as I was :) I have it (48v10ah) for a few weeks now, and until now I'm very happy with it. Despite the fact that I still don't have a functioning Wattmeter, I would like to comment on how it performs. Ok, the acceleration I get with my 9C...

Ok, this is my first e-bike build. The bike is a 1994 Marin Team Issue, and has a nice chrome-moly frame. The tires are 26" street slick Specialized, the components are mostly Shimao XTR. I hooked it up with a 48v 10ah lifepo4 from ecitypower.com and an ecrazyman 48v 30amp controller, and...

Doc you WILL have that sound if you keep going on like this :mrgreen:

Ok ok, just one more :) http://www.youtube.com/watch?v=WZZxXVS9Qyc

I just spotted a new LED bike light on dealextreme with the P7 diode: http://www.dealextreme.com/details.dx/sku.25149 It comes with a 4x 18650 Li-ion battery pack. If someone buys this, please post a review!

Oh and the finish of the device is ok, 12awg wire with connectors that seem to be 4mm female banana type. It looks a bit bulky to me...

Already tested at 15v yesterday. The thing should work up to 60v like the Watt's up... emailed them and they said I should send them pics. I'll do that and see what happens.

Yes it's german. By the way, "Strom" (say the "s" like "sh") means current and an electrician is often referred to as "Stromer".

Yeah, it's really good looking! 36v 10ah battery stored IN the frametube, assists up to 50kmh, disc brakes, only weighs 20kg, and costs 4100CHF ,ca 3700USD! :shock: There was an exhibition a few weeks ago near the place I live, but I wasn't able to go... A while ago I purchased an older swiss...