Mountain Wolf Electric Mtn Bike

[nikos7]

Just found this in mtbr.com:
http://forums.mtbr.com/showthread.php?p=6798670

Also,
http://www.rtve.es/mediateca/videos/20100408/contador-presenta-bici-futurista/739956.shtml

Looks like electric powered bikes are catching on everywhere...

 

[TylerDurden]

Can we get a translation for Contador (por favor)?

 

[Miles]

Voila :wink:

http://siemprenbici.com/



[youtube]VDvSLNz0ues[/youtube]

 

[Ypedal]

Nice !!!!...

Only Booooo i can give it is the 60 to 90 km range claims.. absolute rubbish claim.. but the rest is superbly done ! 8)

 

[Miles]

Only Booooo i can give it is the 60 to 90 km range claims.. absolute rubbish claim..

It's pedelec type assistance, so it may not be too much of an exageration, for the lowest assistance setting........ Also, it looks to be relatively low powered.

 

[nikos7]

seems that Contador has links to Specialized, a rather large bike company that's big on innovation...

http://www.cyclingnews.com/news/contador-looks-at-tour-without-lance

http://www.cyclingnews.com/news/contador-signs-individual-contract-with-specialized


BTW, does anybody recognize the brand of outrunner on that bike?

 

[grandmasterE]

That is pretty fine pitch chain on the e-drive side. Looks like a good way to get the required reduction for RC motor use. Also, insetting the motor like that could allow frame mounted halls without leaving them very exposed.

The claims of range might be a bit outlandish, but a very nice implementation.

e

 

[liteCycles]

I would love to get my hands on that frame and a few of the bits. Looks bullet proof. That is pretty much how I'd do it with an R&D budget. LiPo hidden in the carbon fiber down tube. Motor bolted right into a structural part of the frame. It looks kind of stealth - but I'm sure it buzzes.

I know a lot of folks here are not too fond of two stage reduction down to crank rpm - just to be followed by the inverted reduction back to the cassette. Thus we have Liveforphysics generous broaching effort. And I think the general consensus is 4% per reduction stage. So there may be a 12% drive train loss with this design. But if an RC motor can get 92+% efficiency then it may not be that bad.

Wonder how they did that first reduction right off the motor? (Planetary gears?)

 

[deecanio]

very nice and a big step in the right direction.
It does make me laugh to see the mtb forum members getting all het up about any type of assist, how will they cope as a 60 yr old passes them on the climbs? no amount of shaving will help keep up with that
mmmmm, wonder if they do frames only


D

 

[kfong]

From the video, it looks like a chain drive with maybe a first stage gear reduction. The chain being on the left side of the cranks with a left hand freewheel. Nice design, curious on how much power the motor is? Whole setup is only 8lbs without the bike. With that carbon frame it's going to be one light setup for the trails. Would be a joy to pedal, but sounds like it's going to be a very expensive bike to purchase.

 

[damonjackson_spl]

I wonder how the left side chainring RC drive drives the right hand side without spinning the crank arms???

 

[MitchJi]

Hi,

I wonder how the left side chainring RC drive drives the right hand side without spinning the crank arms???

http://www.siemprenbici.es/en/mountain-wolf

On the other hand, our mountain bike has provided the same speeds as pedaling system (crowns and pinions), because the engine transmits power directly a double bottom bracket system, that is the subject of the patent has already been granted.

Magazine is in Spanish, motor is 400 grams. One useful picture...

Bike Magazine, June 2010 testbike

Download Magazine, so you can read it:
http://static.domestika.com/35142/files/20101001111901-revista-bike-junio.pdf

 

[damonjackson_spl]

Ok. If anyone finds the patent please post it here so we can understand this double bottom bracket drive system. Looks like the coolest systems available have their own bb's like this one and gruber!!

Very very cool

 

[spinningmagnets]

I wrote it up, still wish I could find info on the BB details...

http://www.electricbike.com/siemprenbici/

 

[Whiplash]

OK, I officially feel ripped of haha! That first stage is absolutely a pocket bike 5:1 reduction box like I used on my first build!! Where's my design fee lol! Looks like with less power they can work pretty good! I always wondered if it would!