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  1. #11
    Judging from the videos of the acceleration of the Tesla car / youtube/ i can only imagine what is the acceleration of electric bike with a nice motor.

    Maybe that will be the turning stone in car and bike history, when they can really offer something that's better than their petrol counterparts. I see that more difficult done with bikes, cause petrol bikes accelerate really fast. However not having a gearbox will really help.

    What is the weight to HP of that bike?
    project 1 , 2, Dust Shoe ...

  2. #12
    Quote Originally Posted by silyavski View Post
    Judging from the videos of the acceleration of the Tesla car / youtube/ i can only imagine what is the acceleration of electric bike with a nice motor.
    The difficulty with a bike is the tendency to wheelie limits the acceleration obtainable, but still the acceleration will be substantial. We have a fixed gear ratio, so for example if we gear it for a top speed of 160mph we will, according to my calculation,easily get 0-60 in under 2.4s and 100mph in about 4.2s. Compare that with these figures:

    Time[note] Make and model Year (model) Time (seconds)[note]
    2.35 Suzuki GSX-R1000 2005 2.35[1]
    2.5 Yamaha VMAX 2010 2.5[2]
    2.6 BMW S1000R 2014 2.6[3]
    2.6 Kawasaki Ninja ZX-14R 2012 2.6[4]
    2.6 Honda CBR1000RR (Fireblade) 2008-2014 2.6[5]
    2.7 Ducati 1198S 2010 2.7[6]
    2.70 BMW S1000RR 2011 2.70[7]

    Quote Originally Posted by silyavski View Post
    I see that more difficult done with bikes, cause petrol bikes accelerate really fast. However not having a gearbox will really help.
    Yes - if we gear it for a torque of just over 1000Nm at the rear wheel, we'll have that torque available all the way up to 180mph.

    Quote Originally Posted by silyavski View Post
    What is the weight to HP of that bike?
    Around 1000W/kg. Compare that with these:

    Honda CBR1000RR 2009 133 kW / 178 bhp 199 kg / 439 lb 668 W/kg / 2.5 lb/hp
    Ariel Atom 500 V8 2011 372 kW / 500 bhp 550 kg / 1212 lb 676.3 W/kg / 2.45 lb/hp
    BMW S1000RR 2009 144 kW / 193 bhp 207.7 kg / 458 lb 693.3 W/kg / 2.37 lb/hp
    Peugeot 208 T16 Pikes Peak 2013 652 kW / 875 bhp 875 kg / 1930 lb 745 W/kg / 2.2 lb/hp
    Koenigsegg One:1 2015 1000 kW / 1341 bhp 1310 kg / 2888 lb 763 W/kg / 2.15 lb/hp
    KillaCycle Drag racing electric motorcycle 260 kW / 350 bhp 281 kg / 619 lb 925 W/kg / 1.77 lb/hp
    MTT Turbine Superbike 2008[143] 213.3 kW / 286 bhp 227 kg / 500 lb 940 W/kg / 1.75 lb/hp
    Vyrus 987 C3 4V V supercharged motorcycle 2010[144] 157.3 kW / 211 bhp 158 kg / 348.3 lb 996 W/kg / 1.65 lb/hp
    Kawasaki H2R Motorcycle 2015[145] 223 kW / 300 bhp 216 kg / 476 lb 1032 W/kg / 1.43 lb/hp
    BMW Williams FW27 Formula One 2005[146] 690 kW / 925 bhp 600 kg / 1323 lb 1150 W/kg / 1.58 lb/hp
    Honda RC211V MotoGP 2004-6 176.73 kW / 237 bhp 148 kg / 326 lb 1194 W/kg / 1.37 lb/hp
    Boeing 747-300[10] at Mach 0.84 cruise, 35,000 ft altitude[disputeddiscuss] 245 MW / 328,656 bhp 178.1 t / 392,800 lb 1376 W/kg / 1.20 lb/hp
    Last edited by Jonathan; 07-05-2015 at 10:28 PM.
    Old router build log here. New router build log here. Lathe build log here.
    Electric motorbike project here.

  3. #13
    Hi Jonathan,
    .
    A bit of metadata mining and found what you were referring to on my Build Log thread. Very nice and I'll be following this one with interest, given some of my parts have also made their way into the motorsport field, although the vehicles in question can "stand up by themselves" ;)

  4. #14
    Thanks for the interest. Co-incidentally I'm also working on a project to self-balance a motorbike for disabled riders, so maybe one day it will fit your criterea!

    We're at the TT now - arrived yesterday. All set up in the paddock, so now it's a race to get the bike finished in time and resit the temptation to play with our pit vehicle - a Segway.
    Old router build log here. New router build log here. Lathe build log here.
    Electric motorbike project here.

  5. #15
    Quote Originally Posted by Jonathan View Post
    Thanks for the interest. Co-incidentally I'm also working on a project to self-balance a motorbike for disabled riders, so maybe one day it will fit your criterea!

    We're at the TT now - arrived yesterday. All set up in the paddock, so now it's a race to get the bike finished in time and resit the temptation to play with our pit vehicle - a Segway.
    How about a few pics.

  6. #16
    Here you go ... I was preparing some cables:

    Attached Thumbnails Attached Thumbnails Click image for larger version. 

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    Old router build log here. New router build log here. Lathe build log here.
    Electric motorbike project here.

  7. The Following 2 Users Say Thank You to Jonathan For This Useful Post:


  8. #17
    We're almost ready now. First qualifier is on Friday...
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

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    Old router build log here. New router build log here. Lathe build log here.
    Electric motorbike project here.

  9. #18
    How much does it weigh Jonathan.? The squareness makes it look heavy but sure it's not.!

    Good Luck to the Team.!

  10. #19
    Quote Originally Posted by JAZZCNC View Post
    How much does it weigh Jonathan.? The squareness makes it look heavy but sure it's not.!
    Got any scales?

    Seriously, we've not had the bike all together yet so it's not been weighed and it doesn't look like there are scales for bikes on this island! We'll weigh it when we can, but I guess about 230-240kg. The batteries are the main weight at ~87kg. The frame hardly weighs anything - it's 7xxx series aluminium.

    Can anyone spot the bits I made ;)
    Old router build log here. New router build log here. Lathe build log here.
    Electric motorbike project here.

  11. #20
    Quote Originally Posted by Jonathan View Post
    Can anyone spot the bits I made ;)
    Would that be for hanging onto.?

    Don't they have a Minimum weight classification for Electric bike racing.? They do for the smelly versions.!

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