Electric motorbike racing

[m_c]

I think Cool Project sums it up!

[kingcreaky]

I think Cool Project sums it up!

A while ago; whilst visiting Jonathon at his house, he let me have a go at an electric push bike he had made. I would consider myself to be quite a "daring" individual, also overweight.

However, I lost my bottle at half-throttle. this thing went like a scalded cat


The work you have done on this motorbike is a credit to you Jon; I cant think of a better person to be involved in such an exciting project. well done.

Dont "sell out" for an office job like I did!!!

[JAZZCNC]

SACRILEGE BLOODY Sacrilegeeeeee I'm still in mourning for smokers and sweet smell of "Castrol R" and adjusting to those valve murdering strokers was bad enough but if they end up making everyone go to these Silent whinners I'm coming to hunt your lot down and wire your balls to those lithium Ion assassins and drain every last bit of juice into your ball sacks.!! .

BUT well done and excellent just the same hats off to you all. . (Just keep off our noisy smelly bikes we love so much.!)

[mekanik]

Know what you mean Dean, have tried to persist with Formula E but it's S***e
without the whine of an internal combustion engine.

[JAZZCNC]

Know what you mean Dean, have tried to persist with Formula E but it's S***e
without the whine of an internal combustion engine.

Ye exactly and only so long you can sit in front of TV screeching Wahhh Wahhh as you go thru the virtual gears sniffing josh sticks and candles oaked in Castrol R. . . .Lol
(Ah there's a money making Idea for Us OLD Racers.!! . . . Instead of Yanky Candles company could be called Cranky Yankers. . )

[EddyCurrent]

Here's a Vincent 1000 I converted

[Jonathan]

Thank you for the, er.. varied comments so far...

(Just keep off our noisy smelly bikes we love so much.!)

It's a bit late for that. In some of the practice sessions and one of the races at Donnigton we were racing at the same time as petrol bikes. They started us off 10s after 600cc (I think) petrol bikes and if you compare the time the electric bike who won our race got with the petrol race, he'd have been in the top 10.

Eddy, I'll see you and your bike at the next race then?

Here's one part I machined for the bike. I didn't actually machine many parts as the health and safety rules prevent me from using the workshops at uni, so I mainly did electrical stuff. The part is a heatsink for the speed controller on the ducted fan that helps cool the motors - one on each side. Wall thickness is 1mm or less:



Thermal image from after a race and testing batteries:

[Jonathan]

This project is progressing, only 23 days to go until we go to the Isle of Mann so I'm very busy along with the others I'm working with. We now have the new custom frame, but there's still a lot to do.

My bank holiday weekend was busy on one part:



I'm currently waiting for the cells to get through customs, then they need testing and soldering into packs.

More info here. Will post more information if there are particular things people here are interested in.

[Boyan Silyavski]

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?

[Jonathan]

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]

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.

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[disputed – discuss]	245 MW / 328,656 bhp	178.1 t / 392,800 lb	1376 W/kg / 1.20 lb/hp