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Alta Motorcycles / Re: Alta Redshift SM test ride (July 2016)
« on: August 25, 2016, 10:54:57 AM »
How does it feel power wise compared to a zero fx?
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2
Electric Motorcycle Events / Re: Electric Motocross Racing
« on: June 30, 2015, 10:42:07 PM »a little onboard video from testing..
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Electric Motorcycle Events / Re: Electric Motocross Racing
« on: June 25, 2015, 09:18:25 PM »
Hello, it is the batteries and the motor (modified) we used from a FX. No other components from Zero on the bike.
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Electric Motorcycle Events / Electric Motocross Racing
« on: June 25, 2015, 11:59:51 AM »
Hello,
I want to introduce our project. The idea was to build an electric powered bike to compete with gasoline bikes here in Germany in a local racing series. Tooked us about 1.5 years to be at the current status but it is stil a long way to go.
Before I forget the most impartant, I want to thank you everyone involved directly or not, everyone in this and the other ev-communities, every employee of companies working in this sector - without you, there would be no base to work from.
I will be writing more about it later when I find time and try to answer all questions if possible.
You can find the website of this project here: http://www.e-mxm.com
Have a nice day.
I want to introduce our project. The idea was to build an electric powered bike to compete with gasoline bikes here in Germany in a local racing series. Tooked us about 1.5 years to be at the current status but it is stil a long way to go.
Before I forget the most impartant, I want to thank you everyone involved directly or not, everyone in this and the other ev-communities, every employee of companies working in this sector - without you, there would be no base to work from.
I will be writing more about it later when I find time and try to answer all questions if possible.
You can find the website of this project here: http://www.e-mxm.com
Have a nice day.
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Parts, Mods And Hacks / Re: Sound Generator
« on: April 28, 2015, 11:29:02 AM »
Do you have any video Doctorbass? Greets
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Parts, Mods And Hacks / Re: Using KTM wheels on a Zero FX?
« on: January 18, 2015, 04:10:32 PM »
Hello,
What are you planning with the bike? Are you going to race it?
What are you planning with the bike? Are you going to race it?
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Alta Motorcycles / Re: BRD, Logos Technologies Win DARPA Grant
« on: January 10, 2015, 01:17:24 PM »
2WD with front hub motor and rear wheel driven be redshift drivetrain?
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Pics and Vids / Re: Zero S test ride
« on: November 23, 2014, 01:09:59 AM »
How did you make it faster?
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Pics and Vids / Re: Zero S test ride
« on: November 23, 2014, 12:25:33 AM »
Mine is like push down as hard as you can from 0mph and half to 1/4 throttle. Climb on the front of the bike feet hugged around the front controller area. And ride that wheelie to 70, first time I tried drag it I wheeleid the whole street far from what the fx can do all in a power
How did you realize this improvement?
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Tech Help / Re: CVT sourcing
« on: November 21, 2014, 12:18:31 AM »
Search for snowmobile cvt, there are units available for this kind of power.
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Pics and Vids / Re: Zero S test ride
« on: November 19, 2014, 11:11:12 PM »Believe what you like but the same vehicle with more horsepower will accelerate faster. Even if the motor has only 10% of the torque, because at same wheel speed you will have more wheel torque if geared for same top speed.
Um, again, no. I'm not trying to argue with you, or make you feel bad, I'm just correcting you. You persist in denying what any Physics 101 class in any college could teach you has been known and accepted for literally 500 years now: Force = mass times acceleration, F = ma. Isaac Newton formulated the law and everyone from high school Physics teachers to every engineer around to NASA understands and agrees that it's true. It's not power that accelerates an object such as a vehicle, it's force, or its rotational analog, torque. High power only becomes necessary as energy is drained from the system at a high rate of speed (such as aerodynamic drag becoming very large at high vehicle speeds), and has to be replaced. That's why power is so important to racing vehicles, which need to attain the highest speeds possible, but torque is far more useful at lower (street-legal) speeds.
Hit up wikipedia or Google and learn some facts. Reality is a pretty nice place to live.
Maybe I did write something wrong in my first post as English is not my home language. I know the physics, it is very kind of you to teach me, thank you. For me it seems as you want to read something I did not try to say.
I try again. Motor torque alone isn't the only/main indicator for acceleration. It depends on the curve how it is delivered and at which speeds. To make it more clear what I mean, here an example. Which bike accelerates faster? Zero Fx 2.8 with 94nm torque and 27hp or an 250 KTM with 35nm/40hp?
I did share two diagrams with you, both are from dynos I did myself. The first (red) shows the torque curve of a Fx 5.7. In my world it shows that the torque is not limited, it's constantly at maximum till other things than the setup let it decrease.
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Pics and Vids / Re: Zero S test ride
« on: November 19, 2014, 12:39:13 AM »Believe what you like but the same vehicle with more horsepower will accelerate faster. Even if the motor has only 10% of the torque, because at same wheel speed you will have more wheel torque if geared for same top speed.
As far as horsepower goes, you need to have a really basic understanding. Horsepower = (Torque x RPMs) / 5252. End of discussion. http://danielmiessler.com/study/horsepower/ So explain to me how you can have a vehicle with 10% of the torque and more horsepower.
Nothing simpler than this, if it delivers the 10% torque at the 15x rpm than the other motor.
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Pics and Vids / Re: Zero S test ride
« on: November 19, 2014, 12:23:42 AM »
Believe what you like but the same vehicle with more horsepower will accelerate faster. Even if the motor has only 10% of the torque, because at same wheel speed you will have more wheel torque if geared for same top speed.
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Pics and Vids / Zero S test ride
« on: November 18, 2014, 12:07:06 PM »
You can believe Biff, he knows what he's writing. The torque is not limited in low rpms, it's set to controller maximum from zero. Look at the red graph in the first picture.
What you feel as acceleration is simple said torque x rpm - resistances. The more horsepower the more acceleration, simple. Again red graph
I had the same feeling as you guys when riding first electric bikes but it's new situation. Blue graph is with gearbox, it shows low gear with less torque makes more power in low rpms and better of the line speed. For example 30nm x 6000rpm > 90nm x 500rpm. That's need to be understood..
What you feel as acceleration is simple said torque x rpm - resistances. The more horsepower the more acceleration, simple. Again red graph
I had the same feeling as you guys when riding first electric bikes but it's new situation. Blue graph is with gearbox, it shows low gear with less torque makes more power in low rpms and better of the line speed. For example 30nm x 6000rpm > 90nm x 500rpm. That's need to be understood..
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Alta Motorcycles / Re: BRD is now ALTA Motors, has revealed production RedShift
« on: October 20, 2014, 11:12:55 PM »
You race with the gas bikes! Here in Europe it is no problem and if the bike is good enough..
The bike must be competitive with gasoline bikes, else it makes no sense.
The bike must be competitive with gasoline bikes, else it makes no sense.
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