Gears do have the win over hubs when it comes to hill climbing, but with a suitably torquey motor you shouldn't really have a problem unless you live on Everest.knoxie wrote:eh? hub motor unsuitable for climbing hills??? TH sell the Puma motor??? hills?? the beauty of electric motors is their wide torque band? you cant equate it to a car engine? its an electric motor? the lotus tesla is a car and has no gears??? the performance of which is pretty interesting
Since when is there a limit to the amount of energy you can store in a finite amount of space?n00bz wrote:My Electric Bike goes 60 miles on a charge and is much lighter?
There are electric bicycles with advertised ranges of 60 miles and extremely lightweight. If you have one, and you find it actually goes 60 miles as advertised- congratulations, you have violated the laws of physics.
Exaggeration bordering on LIES. LIES I tell you! No motor of reasonable size could handle that kind of heat without frying.n00bz wrote:My Bike has a 1000 watts, how can the OptiBike be as fast?
The Optibike is the most efficient electric bike produced - over 75% of the battery power is transferred to the wheel. Many other electric bikes are around 30% efficient. So while the Optibike has 850 watts of power, the other bikes actually have far less.
I think 50V is officially the line between low and high voltage. While you "could" kill yourself on 48V, you'd have to be really trying. In the rain. And have a heart condition.knoxie wrote:Since when was 36V high voltage? and when did 48V become a lethal voltage? uk telephones operate on 50V dc? arrghh this is such a load of BS!
Almost. The US copy also claims it has survived live sniper-fire in Bosnia.knoxie wrote: I am pretty sure that they just copied the American site and pasted it in?
Says who, besides you?safe wrote: As a rule:
If a hub motor and a multispeed motored ebike are compared head to head with the same power you get:
25% more power overall with the geared bike.
25% better efficiency overall with the geared bike.
33% less heat overall with the geared bike.
If you owned a geared electric motor bike you would know.TylerDurden wrote:Says who, besides you?
safe wrote:If you owned a geared electric motor bike you would know.TylerDurden wrote:Says who, besides you?
If Bill's 406 can do 30mph for 20mi, I'm pretty sure it can manage >10mi on streets.safe wrote:...over 30 mph average for a range of over 10 miles. (streets too, not some oval)
There's just no way to do that without gears... I'm sure of it...
I asked him about that (this is the bike in the e-Power race right?) and he said that when he tries to use his aerodynamically contained recumbent bike thing on hills and turns and all it doesn't do so well. Like the best average speed he could get was in the middle 20's.TylerDurden wrote:If Bill's 406 can do 30mph for 20mi, I'm pretty sure it can manage >10mi on streets.
30mph? Ask Lowell.safe wrote: Trust me... if you saw the turns and the speed I'm carrying through those turns in a lean there's no way MOST bikes would be able to keep up just based on geometry and handling of the bike.
I blissfully can't see Safes post, so I was not referring to any of his comments. But, Dogman I agree with what we're saying. Check out the Cyclone kits. They look to do what you and I are talking about. Ypedal and GGoodrum are going to try both the 500 watt and 100 watt kits. With this gearing ability, even with a Ping pack or whatever, you *should* be able to extend range, which is always a goal of mine. I've got the speed, but I can be wasting watts I think. http://www.cyclone-tw.com/newkits.htmdogman wrote:Indeed it can, but how steep was the hill? To emf, i think safe is referring to the motor driving the chain, which can change gears. That way you can run the motor at it's most efficient rpm, and do the same trip on less watt hours. But now that I own a ping, who cares? My bike is as fast as I want, and goes as far as I want, and I like the electric motor simple and gearless. I still want the gears on the bike though, so I can peadle along with it at speed and my butt doesn't go to sleep. i think a lot more bikes will be built in the future that take advantage of gearing and chain drive so they can go farther and climb hills without blowing all the watts. But for kits and do it yourself, i think the hub motor is here to stay.
Lowell's bike is the only bike that might handle well enough and have enough top speed to be competition.TylerDurden wrote:30mph? Ask Lowell.
That pretty much sums up the issue... as the old saying goes:dogman wrote:Gears obviously help all engines, human, elcectric, ice, but again, it is sure easy to do without with electric motors. Just get out the wallet, and pour on the wattage.