Found this video on youtube,,friction power

[joco]

I saw this video on youtube
And like the idea

But would like more infos on whatit as as a motor etc

https://m.youtube.com/watch?list=PL0LAsrXKgn_C2fXyyL84S84Bgafcci9wH&v=CzHZ-jvhhd0

If the guy and bike on this site here?


Looking to do two bike mabe 3. Or two and a push trailer for my kayak.


But want yo used used bike and spendd less possible,

But weare both larg adult,,,,,,,,,need at least 40 km,,,with pedeling etc.



So what would i need as a motor? For friction type like this?

Thanks

 

[spinningmagnets]

"Commuter Booster - <1kg Friction Drive" (adrian_sm, 53 pages)
http://endless-sphere.com/forums/viewtopic.php?f=28&t=22187

"An Advanced Friction Drive System" (kepler, 18 pages)
http://endless-sphere.com/forums/viewtopic.php?f=28&t=16550