Worlds most Dangerous, most insane Ebike on earth.

[liveforphysics]

A lot of people have wanted to see vids of my bike builds. I've not had anything I really felt was worthy of a LFP video yet, until this one.

My 2-day ebike build effort for the hill climb event.

22" extension on the rear wheel drop-outs, so keep that in mind when you see other BMX's doing a wheelie, because this one isn't just balancing the rider over the back wheel, it's actually doing a power-wheelie.

On the dyno, it was able to apply 410-425ft-lbs of torque at the rear wheel from 0mph to ~40-45mph where the torque finally starts to drop off.

It measures around 605-630amps to the motor from 0mph to 40-45mph, then it starts to taper off.



I don't know that it will ever be matched or beaten, but I hope it will.

Enjoy,
-Luke
[youtube]FJsMDsT8siU[/youtube]

 

[liveforphysics]

I forgot to mention, it did win the hillclimb.

 

[Arlo1]

I like the fact you have something working for a change!
But how many threads you going to start on this bike??
Just bugging man im very happy for you and I hope someone else will step up to the plate soon with IDK a collossus in a bmx

 

[StudEbiker]

"It's built on good, safe, engineering principles."

 

[liveforphysics]

You may need a really good cooling setup, or a pair of colossus motors, because this monster is sucking down 41kw and not saturated yet.

 

[Arlo1]

You may need a really good cooling setup, or a pair of colossus motors, because this monster is sucking down 41kw and not saturated yet.

Sucking down 41 kw at what efficiency?
70% with a brushed vs 85-90 with a brushless......

 

[Arlo1]

You should 1/4 mile it

 

[liveforphysics]

Agni's are amazingly efficient. Take a peak at a spec sheet. They manage to be over 90% even at very high power levels.

 

[knoxie]

Hey wow!

Great video Luke and yes that bike wins the title for me! ha ha awesome machine for something that you built in just couple of days as well very good job, its power to weight ratio must match or exceed GP racing bikes ha ha, great to see a build log, test and run video all in one! dont think I have seen that yet on here, I have always loved big pancake motors and was amazed at the power of them, back in 2003 I built one using a Lemco130 that was brutal enough but we could never really feed it with the right batteries (I should dust it down, still have it in my loft).

Thanks for the video you win on all fronts ha ha I would doubt if anyone will step up and beat this for pure speed and acceleration for a while ha ha, be interesting to get some stats for 1/4 mile times with it.

 

[amberwolf]

Now you're making me wonder what one of those would be like on CrazyBike2's descendant that's being built. I'd planned on a chain driven by a frame-mounted hubmotor...but maybe I should be figuring out how to get one of the less-damaged scrappile agni's from LFP. :lol:

...and then I think about all the stuff I destroyed just with my powerchair brushed motors.... :lol:

 

[neptronix]

I wonder..
What kind of crazy spokes / hub were you using?

Motorcycle grade stuff i take it?

 

[Spacey]

All hail the King Baby!

 

[thewmatusmoloki]

AWESOME ......
I wanna ride on it , I wanna ride on it !
Bring it to OZ :lol:

 

[dogman dan]

Ride it,,,,, Hell, I WANT it. I could tell at the DR, you were on the right track with the long tail. You just needed a place to put the feet down lower.

I'm so tempted to build someting much like it. Money is, as always, the barrier for me. Got me thinking though. I have an old 5304, Some 3000 watt controllers, frames laying around, and a welder. Maybe I could rig it up somewhat like a stokemonkey. It wouldn't have that insane power, but maybe enough to at least pull cool wheelies.

You really showed us the way this time. It's a classic bike that goes down in history alongside the bikes Dr Bass has built. 8) 8) 8) 8) 8)

No doubt, you will quarter mile it sometime?

 

[Hillhater]

I wonder..
What kind of crazy spokes / hub were you using?

Motorcycle grade stuff i take it?

I wondered the same,..but looking at the vid, they seem like normal bmx spec stuff !

 

[jonescg]

Luke- Classic build mate! Love it You must have got some ideas from Nayeem :lol:

Hey - the silver brushes you used; any good? Cheap? Hard to make? fail at high temps/speeds? I hate brushes like the next man, but there's something a brushed motor can deliver that a BL can't. Any improvement in brushes has to be a breakthrough of sorts.

I am now very keen to see how my RG does with two of these suckers

 

[Thud]

Yawn.....
Yet another display of hacked together junk that "looks" cool on the internet.
You wanna impress me? show me someone bending it into a corner.
the Title does nothing to promote the sport of powerd bicycle racing, displaying horrible grammer & redundancy.....

smak talk-ON
E-tard will destroy that abortion around Willow springs with 1/12th of the power & one hand tied behind his back, with a flat rear tire, a sinus infection, & bad credit!
(as we say in the poker circles when slo-rolling an arogant biyatch.....FIX-IT!)
smak talk-OFF

Now that i have your attention: did you get the e-mail i sent you?

I seriously want an ellectric Speedway bike......looks perfect for short track warfare.

 

[stanz]

On the dyno, it was able to apply 410-425ft-lbs of torque at the rear wheel from 0mph to ~40-45mph where the torque finally starts to drop off.

410ft-lbs of torque? The 2011 Mustang Boss 302 puts out 380 lb-ft of torque from a V8.

How many BMX wheels have you twisted to shreds?

 

[Doctorbass]

Hey Luke, that woud beat any of my actual ebike on the 1/4 mile for sure!

Awsome!

Thanks for the video.

Now let see it on OFFROAD .. dont forget it's a BMX built after all :wink: :lol:

I would love to race against it with my 106kmh Giant DHcomp on offroad conditions!!

Would you try it over 60MPH? This is probably the world most dangerous powerfull ebike that have 40kW..... without any suspension :lol:

Doc

 

[Arlo1]

On the dyno, it was able to apply 410-425ft-lbs of torque at the rear wheel from 0mph to ~40-45mph where the torque finally starts to drop off.

410ft-lbs of torque? The 2011 Mustang Boss 302 puts out 380 lb-ft of torque from a V8.

How many BMX wheels have you twisted to shreds?

I wont waste my time looking up the proper gear reduction ratios but..
The 2011 mustang BOS propably has about a 4.11:1 rear end gear and ~ 3:1 first gear so it would gear down by 12.33 this meening it would take the 380 ft/lb at the motor and make it into ~4685 lb/ft at the rear wheels. Of course there is some losses in a ICE drive train.

 

[steveo]

awsome!!

 

[John in CR]

Outstanding, but where are the vids of you riding it? Don't tell me you built it, but are afraid to ride. :lol: Bring it down next time, since it looks like the missing ingredient is an aerodynamic beached whale like me as ballast for more manly use of the throttle.

 

[grindz145]

What's that range?.....***snicker***

Efficiency in burnout minutes / charge ?

 

[zombiess]

nice pedobear shirt lol

 

[stanz]

On the dyno, it was able to apply 410-425ft-lbs of torque at the rear wheel from 0mph to ~40-45mph where the torque finally starts to drop off.

410ft-lbs of torque? The 2011 Mustang Boss 302 puts out 380 lb-ft of torque from a V8.

How many BMX wheels have you twisted to shreds?

I wont waste my time looking up the proper gear reduction ratios but..
The 2011 mustang BOS propably has about a 4.11:1 rear end gear and ~ 3:1 first gear so it would gear down by 12.33 this meening it would take the 380 ft/lb at the motor and make it into ~4685 lb/ft at the rear wheels. Of course there is some losses in a ICE drive train.

Yes but you'd be hard pressed to find a single part of the Mustang as thin as the thickest part of the BMX drive train. Even my lowly Dewalt drill can snap #10 wood screws and it's only rated at 400 in/lb.

There has to be some damage to the BMX over time, unless he's feathering the throttle to build to top torque.