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Brammo Racing / Re: eMotoRacing at Roebling
« Last post by BrammoBrian on Today at 11:25:19 AM »
You're right on in all, Brian. I was in 6 before I came out of the last turn and that helped me to gain going in the straight. I shifted up as we were in the corner before the straight. I was going to try 5 throughout next time and maintain corner speed better. I'll be racing against ICE bikes this next time. I don't think there will be another eBike with me in the two races I have scheduled...so it'll be a little different race. Thanks again for your thoughts.

Just to be clear - I think your short shift to 6th in the last corner was a good idea as it maximized drive down the front straight.  You might talk to Pete, but I would guess he was running 5th and up-shifting to 6th on the straight.
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Looks like they import Chinese bikes and sell them under their own brand.
All models have the motor in the rear wheel hub.
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Victory Charger / Re: Input on Charger Design
« Last post by Shinysideup on Today at 02:07:10 AM »
This may be a minor point, but one that is important to my use of a bike:

Have a nominal 12V supply that  actually supplies 14V (to make heated gear more effective) and let users pull 20 amps, so it matches the capacity of, say, a Bosch alternator fitted on BMW airheads.

While you're at it, include a 12V supply plug that's some standard configuration (cigarette lighter?) and accessible.

Here's one rated at 30A:

http://www.waytekwire.com/item/11010/POWER-SOURCE-12V-OUTLET/
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Some nice designs.
136 range is attractive.
But a 60 mph "sport bike"? Hmm...

Guess this sums up their approach:

"‘Most interest we have had so far is from the urban rider who wants a low running cost solution for their commute. When you consider that the average commute is around 20 kilometres a day and that an electric alternative that will cost less than €200 to run a year, it makes great financial sense."
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Brammo Racing / Re: eMotoRacing at Roebling
« Last post by barboo on Today at 12:06:15 AM »
No problem.  Went back and watched the Race 2 video.  Looks like you're back shifting twice going into turn 1 and then immediately over-rev'ing out of it.  I would try sticking with 5th and see how that feels.  Also looks like you ran 6th through the final corner and onto the front straight - which may actually be the advantage you had over Pete down the front straight.  Does that sound right?  If so, I would feel even more strongly that you could run that full course in 5th and 6th.  Maybe even give you the option of running up a tooth on the rear if you wanted to play with something else.
You're right on in all, Brian. I was in 6 before I came out of the last turn and that helped me to gain going in the straight. I shifted up as we were in the corner before the straight. I was going to try 5 throughout next time and maintain corner speed better. I'll be racing against ICE bikes this next time. I don't think there will be another eBike with me in the two races I have scheduled...so it'll be a little different race. Thanks again for your thoughts.
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Brammo Racing / Re: eMotoRacing at Roebling
« Last post by BrammoBrian on February 28, 2015, 05:26:21 PM »
Thanks for weighing in Brian. Appreciate the insight. I have some more races and practice at Roebling in two weeks with WERA along with the big bike. I'll try some turns at a higher gear on a couple of corners to see how that feels during practice. If it doesn't mess my rhythm up, I'll incorporate during the race.

No problem.  Went back and watched the Race 2 video.  Looks like you're back shifting twice going into turn 1 and then immediately over-rev'ing out of it.  I would try sticking with 5th and see how that feels.  Also looks like you ran 6th through the final corner and onto the front straight - which may actually be the advantage you had over Pete down the front straight.  Does that sound right?  If so, I would feel even more strongly that you could run that full course in 5th and 6th.  Maybe even give you the option of running up a tooth on the rear if you wanted to play with something else. 
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Brammo Racing / Re: eMotoRacing at Roebling
« Last post by barboo on February 28, 2015, 01:47:59 PM »
Yes - peak power occurs around 5k, and then you enter into a "field weakening" zone that attempts to maintain power up to about 8k.  The power does start to taper off after the peak, but not so significantly as to say that it is always necessary to shift in a race condition.  At a track, you often find (even on a gas bike) that you will run higher revs than you would otherwise run in order to not shift at an inopportune time on corner exit.  Having the ability to "hang a gear" a bit longer with little penalty is what four-stroke, inline-four Japanese bikes do very well.  The other option you have is to run a higher gear into the corner, trying to maintain corner speed and drive out with plenty of rpm window to work with. 

Given his result, Bob probably got it pretty close to right to find the correct compromise - in this case, letting the motor over-run peak power a bit on the exits.  An area where it might be possible to improve is on the straight, where you're really just trying to maximize your acceleration rate in a straight line.  In this case, targeting a shift at 5-6k will ensure that you're getting the most of the power available.
Thanks for weighing in Brian. Appreciate the insight. I have some more races and practice at Roebling in two weeks with WERA along with the big bike. I'll try some turns at a higher gear on a couple of corners to see how that feels during practice. If it doesn't mess my rhythm up, I'll incorporate during the race.
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Brammo Racing / Re: eMotoRacing at Roebling
« Last post by BrammoBrian on February 28, 2015, 12:34:49 PM »
I'm not one to give advice (never been on a racetrack!)

But I do make fast runs on a particular stretch of roadway now and again and I've noticed a tapering off of power from 6K to when the limiter kicks in at 8K. I believe it was Brian who has stated here that the peak of power is at 5K. When "going for it", I try to shift between 5K and 6K on each shift. It IS possible to develop an ear for the motor speed, but I'm not sure I could hear that surrounded by ICE noise on a track.

Yes - peak power occurs around 5k, and then you enter into a "field weakening" zone that attempts to maintain power up to about 8k.  The power does start to taper off after the peak, but not so significantly as to say that it is always necessary to shift in a race condition.  At a track, you often find (even on a gas bike) that you will run higher revs than you would otherwise run in order to not shift at an inopportune time on corner exit.  Having the ability to "hang a gear" a bit longer with little penalty is what four-stroke, inline-four Japanese bikes do very well.  The other option you have is to run a higher gear into the corner, trying to maintain corner speed and drive out with plenty of rpm window to work with. 

Given his result, Bob probably got it pretty close to right to find the correct compromise - in this case, letting the motor over-run peak power a bit on the exits.  An area where it might be possible to improve is on the straight, where you're really just trying to maximize your acceleration rate in a straight line.  In this case, targeting a shift at 5-6k will ensure that you're getting the most of the power available. 
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Brammo Racing / Re: eMotoRacing at Roebling
« Last post by Shinysideup on February 28, 2015, 02:54:39 AM »
I'm not one to give advice (never been on a racetrack!)

But I do make fast runs on a particular stretch of roadway now and again and I've noticed a tapering off of power from 6K to when the limiter kicks in at 8K. I believe it was Brian who has stated here that the peak of power is at 5K. When "going for it", I try to shift between 5K and 6K on each shift. It IS possible to develop an ear for the motor speed, but I'm not sure I could hear that surrounded by ICE noise on a track.
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