sn0wchyld
100 kW
DrkAngel said:Li-ion at .5C are about 100%+.
wait... what do you mean by 100%+? a battery that is more than 100% efficient?! WOW!
DrkAngel said:Li-ion at .5C are about 100%+.
100%+ ... as output percentage of "rated" battery capacity.sn0wchyld said:DrkAngel said:Li-ion at .5C are about 100%+.
wait... what do you mean by 100%+? a battery that is more than 100% efficient?! WOW!
jonathanm said:When I lived in Chicago proper, drivers were pretty crazy, in an aggressive sort of way. Now I live out in the burbs I have the opposite problem....
As a Brit in the US, I've never been fond of the 4 way stop...but out here in the burbs, it becomes a real PITA....people who I'm sure are very nice pleasant people who mean no harm and are only being polite, REFUSE to be the first to go at a 4 way stop. Even if they were there first.
Example.... I am approaching a 4 way stop and on the other side some nice lady is also approaching in her SUV. She is going faster than me, and could in fact reach the stop, STOP!, and drive on before I even get to the intersection. Instead she decides to stop, and wait for me to stop as well. She is not happy until there is a vehicle on all 4 sides of the intersection. Ok, now it's time to get moving and she was there first.....but she refuses to move until everyone else has moved....that shows what a lovely considerate person she is........
NeilP said:For those of us in Uk Europe...what are the rules on this 4 way stop junction?
I am coming over to USA/Canada in October and am looking to hire a harley for a week or so. Would be good to know what the rules are.
In fact I may start a new thread on this subject
I don't like them either, but I bought and use them in flashing mode ever since Sept 3, 2010 when a truck pulled out in front of me after "not seeing" me approaching him on my bicycle at a reasonable speed. $12K in medical bills later, I do not care if I annoy anyone, as long as they see me.REdiculous said:...As a driver I absolutely hate those red flashers on the back of bikes. They're too bright and distracting - it makes it hard to see where you are because it strobes and you move. I can see you're there anyway because you have a headlight..at least turn the flashing off.
I have a Walbike that I have ridden since the early 90's. After my wreck last year at 20MPH, the wheels were bent, one brake handle was bent, one hand grip was torn off, and it suffered a few other minor scrapes. The frame was not bent or any other component including the handlebars. After rebuilding it (faster this 2nd time), It is still my fastest ebike to-date at 57MPH.Jason27 said:What I find annoying are the people buy cheap $400 walmart electric bikes then complain when it breaks down. They think they are getting a good deal when really they bought crap on wheels...
People think that the sun puts out far more energy per square meter on the earth's surface than it really does and many think that solar panels are nearly 100% efficient. I have a relative that is a high school physics teacher who actually asked me that question.torqueon said:Flattery that displays total ignorance !
1 Can you make it solar powered ! I am trying to figure out how to Carrie the 4 x 8 sheet of plywood from home depot !
There are people on this forum who actually relieve that nonsense. That fact still has me flabbergasted.torqueon said:2 Recharge batteries with generator ! What happened to basic physics in school ?
If I had a nickel for every time someone recommended that to me, I'd be a rich man. All these things have been around for decades. It's battery technology that has to advance to make our hobby/passion more feasible to the masses.torqueon said:3 You should patent that thing . I mean please ! bicycles, motors, batteries, etc have been around, well over a century
Unfortunately, we have groups of bicyclists here in Florida that take up both sides of the road on weekends. Obviously, you can take up a whole lane; that is our right. But the whole road?bionx 1954 said:Hear in Ottawa we have a lot of paved NCC green space shared paths that are well marked and have a YELLOOW line down the center.
But that does not stop walkers from stopping in the middle of the path and TALKING to each other which bring bike traffic to a STOP, or worse WALKING 4 or 5 a breast to STOP All TRAFFIC BOTH WAYS. What do you call 5 blonds walking a breast ( a wind tunnel)
Very common here in Florida and it irritates me too. They want the best of both worlds; others must respect their use of the road; and they don't have to obey any traffic control devices.TonyReynolds said:...As a driver, motorcyclist and bicycle rider, what annoys me most (even more than drivers using cell phones) are bicyclists that REFUSE to obey the rules of the road. The ones that run red lights and stop signs, that use cross walks to cruise thru an intersection.
Case in point, a GROUP of riders the other day that flew down a hill and blew through the stop sign to continue in a right turn at the intersection. They didn't even slow down to check for traffic from their left. Their attitude (I guess...) is that they're bicyclists and "by-God we have the right of way" no matter what, like the sailboat that pulls in front of a state ferry on Puget Sound. "What, me? YOU have to YIELD!"
It just frosts my cookies....
Floont said:[ It is still my fastest ebike to-date at 57MPH.
I am currently converting a new 2010 "Walgoose" Blackcomb. They're cheap bikes, that's for sure, but they make excellent bases for ebikes with their use of steel where it needs to be steel.
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Sorry it took so long to respond. I had to look up this word "safety". :wink:lester12483 said:57 MPH ??.. Geez! Aren't you worried about safety?
Floont said:Sorry it took so long to respond. I had to look up this word "safety". :wink:lester12483 said:57 MPH ??.. Geez! Aren't you worried about safety?
I am concerned about safety, but I am not worried. I wear a lot of protective gear when I'm going for a speed-run. My "normal" riding speed is in the 30 to 40 MPH range. I live in a rural community and that is the general speed of vehicles when I encounter one. Most of the neighbors wave at me as I pass their places; I'm just part of the scenery.
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Happy Hill? Too many cars.miniebiker said:Rural Tampa ? 579 hill ?
I figured a fairly simple-cheap way to determine your motor system peak watt output = HP.DrkAngel said:It started out as a little bit laughable, but is so persistent that it has become annoying ...
Forum members that rate their motors by how many watts they can pump into them!
They don't seem to recognize that pumping in double the watts, might produce 50% more torque, but also produces 350% the damaging heat.
1000w = 750w torque + 250w heat = 75% efficient
2000w = 1125w torque + 875w heat = 56% efficient
The "watt" rating, on an electric motor, is a measure of a motors power output!
Not the input watts!!!
A "750w motor" is equal to 1 horse power. (750w = 1hp)
The motor might require 1000w input to produce 750w peak output, this would mean that the motor is 75% efficient!
Various motors attain between 75-90% "peak"* efficiency!
Controllers vary widely in efficiency, also!
"Peak"* efficiency is between 80-95%.
Batteries vary widely in efficiency, also!
eg. SLA batteries expended at 1C are 60% of rated, Li-ion at .5C are about 100%+.
* - "Peak" efficiency is attained somewhere near 75% of top speed.
At a dead stop, efficiency is 0%, but improves as "peak" is neared.
At 5mph 1000w input, might produce, 20% efficiency, or 200w motor output.
.......... 1500w input, might produce, 15% efficiency, or 250w motor output.
750w output might require
750w/75% motor efficiency = 1000w/80% controller efficiency = 1250/60% SLA efficiency = 2083 watts used!
Yes, I do realize that dynamometer testing is the only accurate way to measure motor output, and beyond the reach of most everyone, but please ... realize that input watts is not directly relateable to output watts!
oatnet said:On my moto, my biggest peeve is the 'tards who can't stay within their lanes on turns at intersections. We've got nice curved lane markers in intersections here, but instead of following the curve, most folks do a sharp 45 degree turn, then drive a straight line across the lane markers, then make another sharp 45 degree turn as they enter the cross street, which pushes the passenger front corner into the next lane.
I run, daytime, with a 260 lumen strobing led light. Almost, of a certainty it has saved me from a multitude of unsavory encounters. How can I feel so certain? Once in a while I forget to turn it on ...lbz5mc12 said:Yesterday I was riding heading east on a residential main road going about 20 mph, I have no stop sign, and a freaking lady starts to enter the intersection from a side street on the left of me. I was only about 20 feet away so I hit my brakes. She finally notices me and decides to stop in the middle of the road to let me go. Realizing the obstacle she has just created I start yelling at her and waving her forward to get her out of the middle of the road. She finally gets out of the way and I continue on thinking to myself, "what the hell is wrong with people"?