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| gixxersixx |
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gixxersixx
Trackday Trickster
Joined: 17 Sep 2006
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 Posted: 15:17 - 03 Dec 2006  Post subject: electric bike |
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dont know if this has been posted before
https://www.gizmag.co.uk/go/4083/1/
bit of a long article, some interesting figures if you can be bothered to sift through it
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| Itchy |
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Itchy
Super Spammer
Joined: 07 Apr 2005
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Posted: 15:58 - 03 Dec 2006  Post subject: |
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me wonders at the current legal status of such vehicles since they need no insurance , no MOT or tax = would using these dodge congestion charging? ,
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Spain 2008France 2007Big one 2009 We all die. The goal isn't to live forever, the goal is to create something that will. In the end, your life will flash before your eyes. Make sure it is worth watching. |
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| TheShaggyDA |
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TheShaggyDA
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| Whosthedaddy |
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Whosthedaddy
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| TheShaggyDA |
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TheShaggyDA
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Posted: 21:14 - 03 Dec 2006  Post subject: |
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If it's heavier than 40kg, not fitted with pedals, exceeds 200w or is capable of more than 15mph then it stops being classed as an electrically assisted bicycle and has the same requirements as a moped - tax, insurance, helmet etc.
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Current: CB500 Previous: CB100N, CB250RS, XJ900F, GT550, GPZ750R/1000RX, AJS M16, R100RT, Enfield Bullet
[i:6e3bfc7581]But still I fear and still I dare not laugh at the madman...[/i:6e3bfc7581] |
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| kawashima |
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kawashima
World Chat Champion
Joined: 03 May 2005
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| Posted: 17:17 - 11 Dec 2006 Post subject: |
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Yamaha sells 2 types of electric scooter here.
47kg, 0.58kw(0.8bhp) motor. 25V-24Ah lithium ion batterie offers you 30km(19miles) ride in economy mode. Max speed is 30km/h in economy mode, 43km/h in power mode. You can fully charge the batterie in 6 hours from AC100V. You can have spare batterie in carrying bag. batterie life is about 10000km(6250miles).
Price is about 210,000yen(930 quids).
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Many of users seem to buy them as a toy or 3-4 miles commuting. Too powerless and short milage.
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From this spec, I suppose in order to make decent bike with electric power, (100bhp / 0.8bhp) * (300miles / 19miles) = 2000 times more efficient batterie is necessary, plus it must be recharged in 2minutes(2min / 360min) = 180times quicker, plus it must endure more than 1000 times of recharging. 300000miles / 6250 miles = 48 times tough.
totally, 2000*180*48= 17,280,000 times more efficient batterie is necessary for decent electric bike I suppose.
https://www.yamaha-motor.jp/ev/passol/design/img/pic_002.jpghttps://www.yamaha-motor.jp/ev/ec-02/design/color/img/silver01.jpg
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2020 Touring Serow 250
,past 2012 YB125SP, 2008 TDM900 2005 W650, [url=d], 2002 LS125R, 2002 CB400SF, NS50F, C50 / Trip to UK(2009), Hokkaido touring(2013) |
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| aha-shake |
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aha-shake
Scooby Slapper
Joined: 27 May 2006
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| Posted: 18:46 - 11 Dec 2006 Post subject: |
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Kawashima.
You sir, are truly king among men.
With your magical mathematics of truth!
I think you should email that to the site, see what they say.
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| TheShaggyDA |
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TheShaggyDA
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| Posted: 19:28 - 11 Dec 2006 Post subject: |
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| kawashima wrote: | From this spec, I suppose in order to make decent bike with electric power, (100bhp / 0.8bhp) * (300miles / 19miles) = 2000 times more efficient batterie is necessary, plus it must be recharged in 2minutes(2min / 360min) = 180times quicker, plus it must endure more than 1000 times of recharging. 300000miles / 6250 miles = 48 times tough.
totally, 2000*180*48= 17,280,000 times more efficient batterie is necessary for decent electric bike I suppose. |
Realistically though, you'd not need a 100bhp motor to make a "decent" bike. The bike in the article has 18bhp, and gets you 52mph, and a 27bhp equivalent would take you to 65mph. That's enough for commuting, which is where I think the main market would be initially.
Electric bicycles have a realistic range of up to 25 miles, with smaller battery packs than use here. Assuming at least quadruple the capacity, you've got a range of 100 miles. Halve that for the weight difference, and you get 50 miles - which would cover a lot of people's commute. You could always leave a pack charging in the office, so that when you get to work, you'd swap the used pack for your fresh pack - this will double your commute radius.
Recharge time (again for bicycles) is about 6-8 hours per pack, which is enough time for overnight and whilst at work charging. The main problem would be the longevity, with 300-500 being the norm.
An electric bike's main hurdle is the convenience and availabilty of petrol. Unless a standard battery type is agreed upon, and a network of stations be put in place allowing these to be swapped, flat one for a charged one, then electric power is going to restrict journeys to the range of your recharging point(s).
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Current: CB500 Previous: CB100N, CB250RS, XJ900F, GT550, GPZ750R/1000RX, AJS M16, R100RT, Enfield Bullet
[i:6e3bfc7581]But still I fear and still I dare not laugh at the madman...[/i:6e3bfc7581] |
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| craigT19 |
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craigT19
Jolly Green Giant
Joined: 09 Feb 2002
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Posted: 23:04 - 11 Dec 2006  Post subject: |
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ive seen a cool battery powered trial bike, thats capable of power wheelies, wheelspins etc..
specs
Frame: Laser-cut double downtube with replaceable rear sub-frame. Powder-coated finish.
Fork: Ohlins-285mm front travel, fully adjustable rebound and compression.
Shock: Ohlins fully adjustable rebound and compression.-280mm rear travel.
Motor: Brush-type Neodymium Pancake
Controller: Fully programmable 19.2 kiloWatt Peak (25.7 electrical HP)
Horsepower (Rear wheel dyno tested): 18.2 HP
Top Speed: 40 MPH
Battery: 16.7 amphour-48 volt nominal-total capacity 800 Watthours
Wheels / Tires: 3.0 x 24 Rear, 3.0 x 24 Front. Ringle rims.
Rear Hub: Proprietary CNC billet aluminum.
Front Hub: Billet aluminum.
Brakes: Formula Hydraulic 8" rotors.
Seat: Yamaha YZ style.
Wheelbase: 56"
Weight (fully charged): 178 pounds.
intresting comparison between it and a honda xr250
https://www.electricmoto.com/electricmoto.php?id=specs_blade
main url https://www.denalicycles.com/
site has videos aswell[/url]
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Old Thread Alert!
The last post was made 17 years, 141 days ago. Instead of replying here, would creating a new thread be more useful? |
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