View Full Version : Roskva electric motorcycle revealed in Norway with carbon fiber chassis and clothes

08 July 2012, 1212

By Tim Stevens on July 8, 2012
Posted on Engadget (http://www.engadget.com/2012/07/08/roskva-electric-motorcycle/?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+weblogsinc%2Fengadget+(Engadg et))

The choices in the electric motorcycle market just keep getting juicier, and while you'll still have to stick with the more established brands like Brammo, Zero or BRD if you're looking to make a purchase, a hot new prototype has just been unveiled that threatens to make them all look a little bit... pedestrian.

Read more HERE (http://www.engadget.com/2012/07/08/roskva-electric-motorcycle/?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+weblogsinc%2Fengadget+(Engadg et))

08 July 2012, 1458
That is a very nice looking bike. It is amazing how much time and effort must go into making a bike like that. Another group of builders and designers have turned their dreams into reality.

I am still waiting to see the Brammo Empulse R in the showroom and on the road. I really want to know how their transmission is going to work out in practice.

08 July 2012, 1721
Was looking for more information about the build but Roskva's fb page (http://www.facebook.com/RoskvaElectric) says, "Our website (http://www.facebook.com/l.php?u=http%3A%2F%2Fwww.roskva-electric.com%2F&h=RAQHzG51I) is down again. Too much traffic. Sorry for the inconvenience."

Found some pics of the build on their Flicker (http://www.flickr.com/photos/roskva-electric/). Lots of carbon fiber fabrication. Even the battery pack housings were made out of carbon fiber.

3413 3412

Article from prior to release date here (http://www.treehugger.com/bikes/carbon-fiber-motorcycle-fast-and-cheap.html).

Nuts & Volts
08 July 2012, 1830
From the pictures it appears that they run Headway and 2 Agnis. Looks like 34s2p in a single box. Looks like both boxes are then run in parallel so 108.8V 40Ah (4.3kWh). Looks like a Kelly controller too. Probably a 120V 800A to 1000A unit

63 miles on 4.3kWh would require 68wh/mile @ 100%DOD which is not a novel feat, but may be possible with a lightweight system.

Not bad choices, just not the greatest parts to use for a production machine. Best of luck to them, would love to get the chance to be in their shoes

08 July 2012, 2009
Website is up again now...


Motor and battery
Type Electric DC
Make Lynch Motor Company
Model D135RAGS
Configuration Dual engines connected in serial
Peak power 236 kW, total 96,6 hp
Peak torque 80 Nm (59 ft. lbs.)
Battery configuration 414 cells in series and parallell
Battery capacity 6 kWh

Rake 23,45
Trail TBA
Front suspension Telescopic USD fork, 43 mm
Rear suspension Krarm integrated rear suspension
Front suspension travel 120 mm
Rear suspension travel TBA
Front tire 120/70-17
Rear tire 190/50-17
Front brakes Dual discs, 320 mm
Rear brake Electric regenerating

Measurements and stats
Curb weight TBA
Seat height TBA
Wheelbase 1385 mm
Range 62 miles
Top speed 110 mph
0-60 mph 3-4 s
Service intervals 60 000 miles

All specifications are subject to change without warning.

Nuts & Volts
09 July 2012, 0712
I thought the motors may have been the Lemco/Lynch ones. I guess the cells are probably the 15Ah cells and the not 10Ah cells which I assumed the were. Except 414 cells does make sense with any Headway cell...

09 July 2012, 1154
414 cells

that's about 14.5wh/cell

if lifepo4, then they're ~4.5Ah cells, just going by the numbers published.

but 414 cells is not divisible by 36, so that's a little weird

09 July 2012, 1848
I haven't seen any other emc sportbike that is shaft drive. Roskva said they were going for "high service intervals". The swing arm (URL="http://www.flickr.com/photos/roskva-electric/7462167446/") looks kinda bulky with the integrated carbon fiber drive shaft (http://www.flickr.com/photos/roskva-electric/7372819322/). Looking forward to hearing just how silent this one is if/when it hits the street/track.

Autoblogreen (http://green.autoblog.com/2012/07/13/roskva-electric-motorcycles-explores-lightweight-with-carbon-fib/) just picked up the story, but no new details.