I don't think compensating for a certain type of motor is a good way to go.liveforphysics said:
Raising the limit for all to 35Kg would have to do, IMO.
If you decide to squander the weight on dinosaur tech, then......(only joking...
)
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E-Bike Racing: 2011 World Challenge
- Thread starter Tiberius
- Start date
Raising the limit for all to 35Kg would have to do, IMO.
If you decide to squander the weight on dinosaur tech, then......(only joking...
)
dogman dan
Ultra legend
Man that dinosaur has a short lifespan. But lots of us just don't have the skills to fabricate the non hub motor stuff, and have already squandered what we have to spend on a damn frockmotor.
Having problems today with my aotema, so with it off the bike,,,,
Aotema front hub weighs 19 pounds including thick tube, tire, slime. I didn't weigh the tourqe arms or washers and nuts, So call a medium hubmotor 20 pounds, an x5 30 pounds and adjust the weight rule according to how that compares to what you run. Possibly allow some more weight for guys who happen to have full suspension, possibly a lesser allowance for front suspension.
I would think for an x5 mounted on a FS bike weighing 65-70 pounds together, would need at least an 85 pound top weight limit to safely mount 20s 10 ah lipo and a controller, throttle, perhaps some bms stuff. 12 pounds of turnigy for the battery, but a lot more than that if he has headways or A123's.
Really it just depends on what exactly the goal of the limit is. If it's simply to exclude moped , scooter and motorcycle frames even a 100 pound limit would keep em out. If it's to see how powerfull you can make a very light ebike, then maybe lower the limit to 50-60 pounds. But if the intent is to limit the battery, the just weigh the damn battery not the whole bike. Or put a max watthours on the battery size, and let the rider choose voltage and amps and every thing else.
Having problems today with my aotema, so with it off the bike,,,,
Aotema front hub weighs 19 pounds including thick tube, tire, slime. I didn't weigh the tourqe arms or washers and nuts, So call a medium hubmotor 20 pounds, an x5 30 pounds and adjust the weight rule according to how that compares to what you run. Possibly allow some more weight for guys who happen to have full suspension, possibly a lesser allowance for front suspension.
I would think for an x5 mounted on a FS bike weighing 65-70 pounds together, would need at least an 85 pound top weight limit to safely mount 20s 10 ah lipo and a controller, throttle, perhaps some bms stuff. 12 pounds of turnigy for the battery, but a lot more than that if he has headways or A123's.
Really it just depends on what exactly the goal of the limit is. If it's simply to exclude moped , scooter and motorcycle frames even a 100 pound limit would keep em out. If it's to see how powerfull you can make a very light ebike, then maybe lower the limit to 50-60 pounds. But if the intent is to limit the battery, the just weigh the damn battery not the whole bike. Or put a max watthours on the battery size, and let the rider choose voltage and amps and every thing else.
dogman dan
Ultra legend
The front wheel of that specialized weighs 7 pounds, and I 'll guess that the rear is at least 8 lbs, so take that off the weight I was just saying for a FS bike with an x5. If I was to put an x5 on a 40 lb mt bike, it would weigh about 62 pounds, plus controller, battery etc. So maybe an 80 lb limit for an x5 with fs would work. I think 5 lbs more would be all a 9c or 400 clyte would need added if they had a heavier type of frame.
My current race bike, with aotema and 20s lipo would just squeak into the class, so it's not so much that all hubbies need more weight, just the brontosaurus ones. FS might need another 5 pounds at most. DH bikes are not light, people go uphill on those on a ski lift. That specialized btw is not a dh bike, but a much lighter crosscountry race bike. So at 39 pounds, it's actually a light one.
My current race bike, with aotema and 20s lipo would just squeak into the class, so it's not so much that all hubbies need more weight, just the brontosaurus ones. FS might need another 5 pounds at most. DH bikes are not light, people go uphill on those on a ski lift. That specialized btw is not a dh bike, but a much lighter crosscountry race bike. So at 39 pounds, it's actually a light one.
John in CR
Super legend
Amberwolf's bike weighs 150lbs and is just as much an ebike as anyone else's, as is my 115lb ebike. Weight rules are BS, just like they're BS legal regulation in Europe.
Thanks Miles,
I know I need to get into shape, but not for an ebike race. If I cared about my bike winning, I wouldn't ride it anyway. I'd find the smallest person possible that's qualified to ride, and that's even after I get in shape and below 90kg. I'd be looking for a 50kg BMX racer to enjoy the tremendous increase in power to weight. That's why Luke should be careful about the hill climb, because a kid on a powerful bike could easily walk away with Luke's for free.
If weight comes into play, then you take the heaviest rider/bike combo, and everyone gets weighted down to that weight, but there's no way you guys would agree to that.
Why even bother with these rules? You seem to be afraid someone will come with an emoto. I seriously doubt an emoto is going to be any advantage on a go-kart track. They're just too heavy for that kind of turning. I know I'd want the lightest bike possible that has good enough tires for that kind of race. It would be a real mistake for someone to bring a Zero or other production emoto, because they'd get embarrassed anyway.
The challenge will be how to make the event inclusive and fun for the guys who have ebikes that are closer to the bike end of the spectrum than their very lightweight high power cousins at the other end of the spectrum.
Another alternative, depending on turnout, could be a number of divisions. 2 are obviously needed, but good turnout would warrant more. The divisions get set by pre-race qualifying based on times in the 100yd straight dash, and no one gets to ride their own bike to prevent sand bagging. That's why I suggest just a straight and short shot, low risk of crashing someone else's bike. That should match up the bikes pretty well by speed and power for competitive racing where skill and handling win the races. No complicated rules to get around. No complex electronics to supply. People ride what they brought, period.
Can't you tell that I'm an anti-rules guy?
Thanks Miles,
I know I need to get into shape, but not for an ebike race. If I cared about my bike winning, I wouldn't ride it anyway. I'd find the smallest person possible that's qualified to ride, and that's even after I get in shape and below 90kg. I'd be looking for a 50kg BMX racer to enjoy the tremendous increase in power to weight. That's why Luke should be careful about the hill climb, because a kid on a powerful bike could easily walk away with Luke's for free.
If weight comes into play, then you take the heaviest rider/bike combo, and everyone gets weighted down to that weight, but there's no way you guys would agree to that.
Why even bother with these rules? You seem to be afraid someone will come with an emoto. I seriously doubt an emoto is going to be any advantage on a go-kart track. They're just too heavy for that kind of turning. I know I'd want the lightest bike possible that has good enough tires for that kind of race. It would be a real mistake for someone to bring a Zero or other production emoto, because they'd get embarrassed anyway.
The challenge will be how to make the event inclusive and fun for the guys who have ebikes that are closer to the bike end of the spectrum than their very lightweight high power cousins at the other end of the spectrum.
Another alternative, depending on turnout, could be a number of divisions. 2 are obviously needed, but good turnout would warrant more. The divisions get set by pre-race qualifying based on times in the 100yd straight dash, and no one gets to ride their own bike to prevent sand bagging. That's why I suggest just a straight and short shot, low risk of crashing someone else's bike. That should match up the bikes pretty well by speed and power for competitive racing where skill and handling win the races. No complicated rules to get around. No complex electronics to supply. People ride what they brought, period.
Can't you tell that I'm an anti-rules guy?
Tiberius
Regular
Gentlemen, please,
As Luke said earlier: it's a RACE, not an equal opportunities love-in. And it's a RACE to see which rider and bike combo is fastest, not a handicap competition to see who's the best rider, which bike would make the best commuter, etc. I get the impression that some of the people posting suggestions have not got racing in their blood.
I said before, when you propose a rule, or a rule change, think carefully about what you are trying to achieve; quite often it can have the opposite effect. In fact, how about when someone makes a proposal, they state what the intent is?
For instance, if its to level the playing field, then I refer you to the above comment: Its a race.
If its to get more people involved: Good intent, but complex rules tend to have the opposite effect.
If its to move the boundary between e-bike and electric motorcycle: The boundary was set over here at 40 kg (88 lbs). Don't you think that a ready to race version, stripped down, should come in a little below that?
If its to include certain types of motor/batteries: If they meet the other rules, they're in. Its not a fair test of technology if different technologies have different rules.
If its to include certain popular combinations: Why? Why should you be allowed to marry a heavy motor to a heavy frame and heavy batteries? Firstly, admit that its bordering on a motorcycle. Secondly, it will just allow the lighter frames and lighter motors to run insane power levels.
If its to make it exciting, or to stop the cost/power/speed getting out of hand: I hope we have that covered already.
Nick
As Luke said earlier: it's a RACE, not an equal opportunities love-in. And it's a RACE to see which rider and bike combo is fastest, not a handicap competition to see who's the best rider, which bike would make the best commuter, etc. I get the impression that some of the people posting suggestions have not got racing in their blood.
I said before, when you propose a rule, or a rule change, think carefully about what you are trying to achieve; quite often it can have the opposite effect. In fact, how about when someone makes a proposal, they state what the intent is?
For instance, if its to level the playing field, then I refer you to the above comment: Its a race.
If its to get more people involved: Good intent, but complex rules tend to have the opposite effect.
If its to move the boundary between e-bike and electric motorcycle: The boundary was set over here at 40 kg (88 lbs). Don't you think that a ready to race version, stripped down, should come in a little below that?
If its to include certain types of motor/batteries: If they meet the other rules, they're in. Its not a fair test of technology if different technologies have different rules.
If its to include certain popular combinations: Why? Why should you be allowed to marry a heavy motor to a heavy frame and heavy batteries? Firstly, admit that its bordering on a motorcycle. Secondly, it will just allow the lighter frames and lighter motors to run insane power levels.
If its to make it exciting, or to stop the cost/power/speed getting out of hand: I hope we have that covered already.
Nick
John in CR
Super legend
That's why Nascar is racing and Formula1 is a spending contest. Please change the thread title to "Under 40kg E-bike Racing". I'm sorry that I didn't realize the purpose was to get just a handful of entries running 10kw+ RC type motors. There's nothing wrong with that at all. Instead, I would have gone a route that encourages participation, and an event with both an open division and qualifying divisions accomplishes both. One short race and it's over sounds a bit boring, like yesterday's draw in soccer.
John in CR
Super legend
Miles said:
To that I would only respond, if that's true then over 20kph is a moped too, or whatever the legal limit is.
Tiberius
Regular
To add to my post above, I do not mean to diss any contributions and I'm certainly not going to strike a pose and say I'm taking my ball away if you don't do it my way.
But some of the suggestions about how to run a race, though they are meant with the best will in the world, seem to be coming from non-racers. Now, if they are of the form "I would come if only this were slightly different", then that's worth taking on board, but some of them just seem to be missing the point.
Thud has raised some suggestions for safety rules. Dogman made an interesting suggestion about battery weight; I'll have to think that one through. There's other good stuff in there too, but some of it is going off at a tangent.
FWIW, I posted a link to this thread on the German forum, thinking a competitive bunch like that would be straight in here, especially since we've just had pics posted on ES of a race in Berlin. http://www.pedelecforum.de/forum/showthread.php?t=5712
Instead they've gone off on a tangent about how the weight limit is too high, its far too dangerous and can we have 150 Wh limiters.
I've had a lovely day. I rebuilt the drive shaft on my car. I did some gardening. I cycled to the airfield and went flying. I went to a biplane gathering. I came home and watched the British One-Two in the Canadian Grand Prix. My tickets to Glastonbury were delivered to my door. I opened a bottle of Chilean red. Then I turned on my PC and suddenly started thinking "Oh Lord, please don't let me be misunderstood".
Nick
But some of the suggestions about how to run a race, though they are meant with the best will in the world, seem to be coming from non-racers. Now, if they are of the form "I would come if only this were slightly different", then that's worth taking on board, but some of them just seem to be missing the point.
Thud has raised some suggestions for safety rules. Dogman made an interesting suggestion about battery weight; I'll have to think that one through. There's other good stuff in there too, but some of it is going off at a tangent.
FWIW, I posted a link to this thread on the German forum, thinking a competitive bunch like that would be straight in here, especially since we've just had pics posted on ES of a race in Berlin. http://www.pedelecforum.de/forum/showthread.php?t=5712
Instead they've gone off on a tangent about how the weight limit is too high, its far too dangerous and can we have 150 Wh limiters.
I've had a lovely day. I rebuilt the drive shaft on my car. I did some gardening. I cycled to the airfield and went flying. I went to a biplane gathering. I came home and watched the British One-Two in the Canadian Grand Prix. My tickets to Glastonbury were delivered to my door. I opened a bottle of Chilean red. Then I turned on my PC and suddenly started thinking "Oh Lord, please don't let me be misunderstood".
Nick
dogman dan
Ultra legend
Like I said just the concept of a limit is a pandoras box opened.
I'm still not entirely clear what your intent is on doing it by weight Tiberius. If it is to push the technology for lighter fast bikes, then lower the weight limit, and exclude all heavy dinosaur hub motors. It would be cool to see what could be done with a carbon frame, and a tiny RC motor or lighter hubmotor.
I should shut up though, since I most likely can't afford the time off to attend anyway. My vacation time is permanently assigned to the Balloon fiesta in Albuquerque in october. I only did the death race because I could do it on a long weekend. I'm clearly influenced by the no limits mayhem attitude of the death race now.
I'm still not entirely clear what your intent is on doing it by weight Tiberius. If it is to push the technology for lighter fast bikes, then lower the weight limit, and exclude all heavy dinosaur hub motors. It would be cool to see what could be done with a carbon frame, and a tiny RC motor or lighter hubmotor.
I should shut up though, since I most likely can't afford the time off to attend anyway. My vacation time is permanently assigned to the Balloon fiesta in Albuquerque in october. I only did the death race because I could do it on a long weekend. I'm clearly influenced by the no limits mayhem attitude of the death race now.
AussieJester
Legend
Dogmanz...just put 1kw of Lipo in a backpack "rules" said nothing about weight carried on rider just the ~45lb weight of bike 
I dunno John, super motard events are held on go kart tracks the bikes do a good job of getting around them :wink:
KiM
John in CR said:
I dunno John, super motard events are held on go kart tracks the bikes do a good job of getting around them :wink:
KiM
John in CR
Super legend
Nick,
I'm sorry, and it's true I wasn't making suggestions productive to "the best bike wins". Actually mine were directed to the 2012 version Luke was talking about, and some were just tongue-in-cheek. Part of the difference in view may be a cultural one. For Americans going to the races is an all weekend thing, and due to the low cost and low risk this is a type of racing where the spectators for the main event can be participants in the others. To me it's about generating interest in e-bikes, not showcasing the latest technology, and definitely not the beginnings of a new motor sport. I'm not saying the participants aren't serious about racing, of course there's the bragging rights for the winner.
With the typical rider weighing more than twice the bike, the contest will be who can find the smallest good rider if you think about it, since the rider is the dominant factor in the power to weight ratio. How is that finding out who has the fastest ebike? It's more like who found the lightest competent rider of a powerful ebike.
I'm sorry, and it's true I wasn't making suggestions productive to "the best bike wins". Actually mine were directed to the 2012 version Luke was talking about, and some were just tongue-in-cheek. Part of the difference in view may be a cultural one. For Americans going to the races is an all weekend thing, and due to the low cost and low risk this is a type of racing where the spectators for the main event can be participants in the others. To me it's about generating interest in e-bikes, not showcasing the latest technology, and definitely not the beginnings of a new motor sport. I'm not saying the participants aren't serious about racing, of course there's the bragging rights for the winner.
With the typical rider weighing more than twice the bike, the contest will be who can find the smallest good rider if you think about it, since the rider is the dominant factor in the power to weight ratio. How is that finding out who has the fastest ebike? It's more like who found the lightest competent rider of a powerful ebike.
John in CR
Super legend
AussieJester said:
I've never seen one, but don't you think the 200lb less would be a huge equalizer?
dogman dan
Ultra legend
Well, there you go, long as the bike runs with the battery not connected to the bike. Soon as you plug it, it's part of the bike eh?
Something I forgot to mention earlier, when I commented on keeping zero motorcycles out, I was thinking of the guy who runs the track in Tucson. He has a zero there, and I bet it's not slow on his track. That particular track does have some fairly long straights, that caused me to get further and further behind in the death race. So it might be more suitable to a zero than most smaller kart tracks.
Something I forgot to mention earlier, when I commented on keeping zero motorcycles out, I was thinking of the guy who runs the track in Tucson. He has a zero there, and I bet it's not slow on his track.
That particular track does have some fairly long straights, that caused me to get further and further behind in the death race. So it might be more suitable to a zero than most smaller kart tracks.
AussieJester
Legend
John in CR said:
Most of the good motorcycle racers are short and light John so par for the course really :wink:
I would hope that the racing would promote use of newer tech setups half a dozen bikes similar specced to-->
[youtube]8FgaLvJvaFk[/youtube]
Racing elbow to elbow on a tight go kart track would be
decent fun IMO. It is still about ebikes and i agree some weight limit should be imposed i can't think of motorcycle class of racing that doesn't have weight limits.
Under 40 kilo would be acceptable limit to keep it in the e-bicycle class IMO
KiM
EDIT: for the frock motor bois i see a separate class the shot so they can still compete, they could still run in the same race as the rest of the e-bikes like multiple classes bikes are often run in club level road racing competition.
liveforphysics
Super legend
Supermoto's are the fastest thing on 2 wheels that has ever hit a kart track.
My KTM is 220lbs, 74rwhp, massive brembo brakes, and gooey soft race tires. It makes for something with insanely good braking, cornering, and acceleration for a tight track. This is what one looks like on a kart track with proper rider.
[youtube]GDbWSkTwJdk[/youtube]
My KTM is 220lbs, 74rwhp, massive brembo brakes, and gooey soft race tires. It makes for something with insanely good braking, cornering, and acceleration for a tight track. This is what one looks like on a kart track with proper rider.
[youtube]GDbWSkTwJdk[/youtube]
dogman dan
Ultra legend
Maximum weights for those motorcycles or minimum weights?
Forgive my ignorance, I am pretty noob at organized racing. It was just two or 4 guys doing chineese downhill for me most of my life. Loser had to light up out of his pocket on the lift. I thought it was cool when they made it a real sport and called it skiercross.
Great video that posted while I typed! love to see that countersteering on asphalt! Again ignorant, do they run part of the lap on dirt, and then have to clean the tires for the first turn on the paved? Bet that first turn with dusty tires is fun!
Forgive my ignorance, I am pretty noob at organized racing. It was just two or 4 guys doing chineese downhill for me most of my life. Loser had to light up out of his pocket on the lift. I thought it was cool when they made it a real sport and called it skiercross.
Great video that posted while I typed! love to see that countersteering on asphalt! Again ignorant, do they run part of the lap on dirt, and then have to clean the tires for the first turn on the paved? Bet that first turn with dusty tires is fun!
AussieJester
Legend
liveforphysics
Super legend
Here's the problem that I'm seeing. Whatever class gets the higher weight limits is going to be the fastest class. It's also going to be the most expensive class (more battery, higher power controllers etc).
Lets see if I can set an example to see which way the trend goes for a race as weighs increase.
So, if the weight limit was say, 40lbs, what would we be racing?
Geared hubmotors or small RC motors (power would be about the same, cause battery weight limits what you can do) on a 700c type roadbike with 5-10Ah of 36v LiPo. Lots of pedaling. Cost to race would be really low. Look at a bike like grinhills super simple, super cheap RC drive, or any of the normal light pedal assist cute motor or little geared motor road bikes as an example.
$<200 in LiPo battery
$<250 in motor (rc or geared hub)
$<100 in controller 6-fet infinion would be all that's needed
Plus the cost whatever light road bike (or bmx) you wanted to convert. Standard roadbike tires would handle everything perfectly.
What would the result be? Low powered fairly balanced cheap racing. Very low cost to be competitive. Pedal input would be a real factor, and it would take a pretty careful strategy to make 12.5miles of continuous tight braking and corners on a kart track. 1kw bursts would be able all you could afford to do with inherently small battery capacity.
So, make it 50lbs and what happens? Well, the obvious place to get faster would be the battery size, because it enables the use of higher power, which is very limited in the 40lbs class. So, now controller cost goes up, battery cost goes up.
<$350 in LiPo battery
<$250 in motor (rc or geared hub)
<$150 in controller 12-fet infinion
Plus cost of whatever light roadbike or BMX you wanted to convert. Still not a point where anything more than normal road bike race tires would be needed.
What would the result be? About 2x the average power level of a 40lbs bike race. Higher cost to be competitive. Now possible for 2kw+bursts, pedal input still significant as average power level limited by battery would be about 800w-1kw.
So, make it 60lbs and what happens? Well, running a 9C would be possible. Drill the thing full of holes, add fans, add water drip cooling etc. Battery cost and weight can go up by about 25-50% again depending on how you spend the extra lbs. RC drive bikes could spend it on battery and directly have higher average power because the motor weight difference becomes more substantial as hubmotor bikes start using bigger hubs.
<$400-500 in LiPo battery
<$250 in motor, (geared, 9C, or RC)
<$150-350 in controller (12-fet to 18fet is going to be needed here)
Plus the cost of whatever bike you use, it would be possible now for using mountain bikes if you wanted to carry less battery and handle worse (and suspension is of course f'ing retarded for glass-smooth kart-track racing anyways).
Results? Bigger spread in event results for certain. Battery size is now at levels where average power levels can be pretty substantial, meaning motor/controller heating becomes a factor. Extra weight pounds could be spent on super sticky 20" scooter tires for guys using BMX bikes (likely the most logical chassis for a kart track anyways).
At 70lbs, it makes it cost about as much to be competitive as anyone is going to want to spend to win an electric bike race. Average power levels are going to be in the 18-fet or Kelly or custom controller range to be a serious competitor. Motors/controllers ARE going to have cooling problems. Pedaling will hardly matter. It's going to require specialized brakes not to melt down and fail under this high of average power levels. Scooter tires are going to be a substantial advantage, and perhaps a safety concern not to use them. Things are going to be getting pushed as far to the limits as I've ever pushed on an E-bike or E-bike drivetrain. Things are going to break for lots of setups, there will be much smoke from controllers. If you're going to call it the world championships of e-bike racing, I think you set the bar at a costly, and dangerous enough point with a 70lbs limit IMO.
Lets see if I can set an example to see which way the trend goes for a race as weighs increase.
So, if the weight limit was say, 40lbs, what would we be racing?
Geared hubmotors or small RC motors (power would be about the same, cause battery weight limits what you can do) on a 700c type roadbike with 5-10Ah of 36v LiPo. Lots of pedaling. Cost to race would be really low. Look at a bike like grinhills super simple, super cheap RC drive, or any of the normal light pedal assist cute motor or little geared motor road bikes as an example.
$<200 in LiPo battery
$<250 in motor (rc or geared hub)
$<100 in controller 6-fet infinion would be all that's needed
Plus the cost whatever light road bike (or bmx) you wanted to convert. Standard roadbike tires would handle everything perfectly.
What would the result be? Low powered fairly balanced cheap racing. Very low cost to be competitive. Pedal input would be a real factor, and it would take a pretty careful strategy to make 12.5miles of continuous tight braking and corners on a kart track. 1kw bursts would be able all you could afford to do with inherently small battery capacity.
So, make it 50lbs and what happens? Well, the obvious place to get faster would be the battery size, because it enables the use of higher power, which is very limited in the 40lbs class. So, now controller cost goes up, battery cost goes up.
<$350 in LiPo battery
<$250 in motor (rc or geared hub)
<$150 in controller 12-fet infinion
Plus cost of whatever light roadbike or BMX you wanted to convert. Still not a point where anything more than normal road bike race tires would be needed.
What would the result be? About 2x the average power level of a 40lbs bike race. Higher cost to be competitive. Now possible for 2kw+bursts, pedal input still significant as average power level limited by battery would be about 800w-1kw.
So, make it 60lbs and what happens? Well, running a 9C would be possible. Drill the thing full of holes, add fans, add water drip cooling etc. Battery cost and weight can go up by about 25-50% again depending on how you spend the extra lbs. RC drive bikes could spend it on battery and directly have higher average power because the motor weight difference becomes more substantial as hubmotor bikes start using bigger hubs.
<$400-500 in LiPo battery
<$250 in motor, (geared, 9C, or RC)
<$150-350 in controller (12-fet to 18fet is going to be needed here)
Plus the cost of whatever bike you use, it would be possible now for using mountain bikes if you wanted to carry less battery and handle worse (and suspension is of course f'ing retarded for glass-smooth kart-track racing anyways).
Results? Bigger spread in event results for certain. Battery size is now at levels where average power levels can be pretty substantial, meaning motor/controller heating becomes a factor. Extra weight pounds could be spent on super sticky 20" scooter tires for guys using BMX bikes (likely the most logical chassis for a kart track anyways).
At 70lbs, it makes it cost about as much to be competitive as anyone is going to want to spend to win an electric bike race. Average power levels are going to be in the 18-fet or Kelly or custom controller range to be a serious competitor. Motors/controllers ARE going to have cooling problems. Pedaling will hardly matter. It's going to require specialized brakes not to melt down and fail under this high of average power levels. Scooter tires are going to be a substantial advantage, and perhaps a safety concern not to use them. Things are going to be getting pushed as far to the limits as I've ever pushed on an E-bike or E-bike drivetrain. Things are going to break for lots of setups, there will be much smoke from controllers. If you're going to call it the world championships of e-bike racing, I think you set the bar at a costly, and dangerous enough point with a 70lbs limit IMO.
John in CR
Super legend
Weight limit the Open class makes sense then. Other classes to be determined by 100yd dash times with another rider of similar weight to the owner. The us for fun guys get to have fun with whatever we brought, and watch you guys running the Main Event, being glad we're not in there with the frustrations of fried electronics.
John in CR
Super legend
Unless it's a given that everyone is going to find a kid, jockey, or small woman to ride their bike, how on earth are you going to address the difference between a 100lb rider on a 70lb bike, and a 180 or 200lb rider on a 70lb bike? Who honestly thinks they can make up for the resulting power to weight difference through bike design and rider skill? I'd think even a 30-40lb difference in rider weight would be huge for a 70lb bike class.
liveforphysics
Super legend
I took video of some areas today I just gotta finish editing together the various clips and I will have a video up.
I just gotta finish editing together the various clips and I will have a video up.
AussieJester
Legend
c'monz Lukey videooooooooz :lol:liveforphysics said:I took video of some areas today
KiM
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