One thing that always bothered me about airplanes is the energy used to take off. On aircraft carriers, they use a launch device, allowing the airplane to "push off" against the carrier. Compare this to airplanes taking…
My 1700x build for video processing has suffered major instabilities -- app crashes and BSODs -- memory corruption type errors. I went through 4 different types of DDR4 memory until I found some that works, even though…
The filter checkboxes are a bit weird, for example elements (such as br and img) which are both self-closing and inline only show up if both self-closing and inline are selected, instead of one or the other. Also there…
Fair point. You don't measure fuel economy on cars by running them on an oval track with the accelerator pinned.
One megahertz is more than enough. That's enough power to compare like three-thousand integer values per second, which is way more than a human can do. We've got these guys out there, and they've got 3 gigahertz and…
You rebel!
Unless you're assuming an awesome future with net guns fired from pirate drones, downing the Amazon drones and stealing their wares, this is just the same package theft issue that already exists.
Probably about 300-500 watt-hours of power and approximately 20 watt-hours per mile, so 15-25 miles.
My favorite sources of information about e-bikes come from endless-sphere.com, electricbike.com, electricbike-blog.com, and the /r/ebikes subreddit. Also I've obsessively watched almost every video with "BBSHD" in the…
A bit more info on the 20wh/mile number that I totally made up. The bike you linked has a 250w motor. Running it at 100% for an hour, if you were able to average 12.5mph for that time, that gives you 20wh/mile. Based on…
$500 worth of batteries, $500 worth of motor, $500 worth of bike, and $2500 worth of R&D/marketing/CEO salary expenses. Batteries have come down in price significantly, just in 2016, I'm sure due to the demand from…
That bike has a 36v, 8.7ah battery. I have a 52v, 13.5ah battery. Watt-hours is volts times amp-hours, so you're looking at 313wh and I've got 702wh, so more than twice. That bike has 1.75" tires and I've got big 3"…
The law in my state defines a bicycle as a "device having two or three wheels with fully operable pedals and an electric motor of less than 750 watts (one horsepower), whose maximum speed on a paved level surface, when…
The power output (watts) is a function of (volts * amps) so if you have a 48v battery, you can output ~15 amps and get 750 watts. The amperage output is controlled by software, and these mid-drives are programmable.…
250 watts is the legal limit in the EU, whereas most states in the US consider e-bikes providing up to 750 watts of power (about 1hp) as still "bicycles" (meaning no registration, license requirements, insurance, etc).…
Here's a video of the installation: https://www.youtube.com/watch?v=SmMtUVO5XZA The folks that made that video are probably the biggest DIY kit sellers and a big (and controversial) force in the e-bike community. I…
I agree about the top speed, 25mph on a trail is dangerous for everybody involved. I want more than 750w of power, not to go faster, but to get up to speed faster after a stop sign/etc. If we could more quickly…
You can get a "race face" front sprocket that has alternating thick-thin teeth. This holds the chain more tightly and makes it much more difficult to fall off.
I built an e-bike last weekend, I have just 35 miles on it so far and I've convinced 1-2 friends to get one already. I love riding but my enthusiasm in winter is severely diminished; this has rekindled it for me.…
Popehat wrote a post about that. TLDR, Cuomo is wrong. https://popehat.com/2016/10/17/no-it-is-not-illegal-to-read-...
It looks like the True Pundit article (linked above) is the original source for this claim, which is sourced as "according to State Department sources". Then there was a wikileaks email…
Reading this and then going back and reading his SF arrest story (linked in the article) is a real contrast.
There's a YouTube channel "Bigelow Brook Farms" where the broadcaster designed and built a geodesic dome greenhouse (lots of passive solar) and does year-round aquaponics. I think he lives in Delaware or somewhere in…
It varies slightly by state, but many places you can have up to 750-1000 watts and up to 20mph unassisted on flat ground and still have a bicycle, meaning no license or insurance requirement. You'll typically pedal…
If they're on dimmer circuits, they could just be cheap LED bulbs. Even if the dimmer is all the way up, and even if the LED bulb is marketed as dimmable.
One thing that always bothered me about airplanes is the energy used to take off. On aircraft carriers, they use a launch device, allowing the airplane to "push off" against the carrier. Compare this to airplanes taking…
My 1700x build for video processing has suffered major instabilities -- app crashes and BSODs -- memory corruption type errors. I went through 4 different types of DDR4 memory until I found some that works, even though…
The filter checkboxes are a bit weird, for example elements (such as br and img) which are both self-closing and inline only show up if both self-closing and inline are selected, instead of one or the other. Also there…
Fair point. You don't measure fuel economy on cars by running them on an oval track with the accelerator pinned.
One megahertz is more than enough. That's enough power to compare like three-thousand integer values per second, which is way more than a human can do. We've got these guys out there, and they've got 3 gigahertz and…
You rebel!
Unless you're assuming an awesome future with net guns fired from pirate drones, downing the Amazon drones and stealing their wares, this is just the same package theft issue that already exists.
Probably about 300-500 watt-hours of power and approximately 20 watt-hours per mile, so 15-25 miles.
My favorite sources of information about e-bikes come from endless-sphere.com, electricbike.com, electricbike-blog.com, and the /r/ebikes subreddit. Also I've obsessively watched almost every video with "BBSHD" in the…
A bit more info on the 20wh/mile number that I totally made up. The bike you linked has a 250w motor. Running it at 100% for an hour, if you were able to average 12.5mph for that time, that gives you 20wh/mile. Based on…
$500 worth of batteries, $500 worth of motor, $500 worth of bike, and $2500 worth of R&D/marketing/CEO salary expenses. Batteries have come down in price significantly, just in 2016, I'm sure due to the demand from…
That bike has a 36v, 8.7ah battery. I have a 52v, 13.5ah battery. Watt-hours is volts times amp-hours, so you're looking at 313wh and I've got 702wh, so more than twice. That bike has 1.75" tires and I've got big 3"…
The law in my state defines a bicycle as a "device having two or three wheels with fully operable pedals and an electric motor of less than 750 watts (one horsepower), whose maximum speed on a paved level surface, when…
The power output (watts) is a function of (volts * amps) so if you have a 48v battery, you can output ~15 amps and get 750 watts. The amperage output is controlled by software, and these mid-drives are programmable.…
250 watts is the legal limit in the EU, whereas most states in the US consider e-bikes providing up to 750 watts of power (about 1hp) as still "bicycles" (meaning no registration, license requirements, insurance, etc).…
Here's a video of the installation: https://www.youtube.com/watch?v=SmMtUVO5XZA The folks that made that video are probably the biggest DIY kit sellers and a big (and controversial) force in the e-bike community. I…
I agree about the top speed, 25mph on a trail is dangerous for everybody involved. I want more than 750w of power, not to go faster, but to get up to speed faster after a stop sign/etc. If we could more quickly…
You can get a "race face" front sprocket that has alternating thick-thin teeth. This holds the chain more tightly and makes it much more difficult to fall off.
I built an e-bike last weekend, I have just 35 miles on it so far and I've convinced 1-2 friends to get one already. I love riding but my enthusiasm in winter is severely diminished; this has rekindled it for me.…
Popehat wrote a post about that. TLDR, Cuomo is wrong. https://popehat.com/2016/10/17/no-it-is-not-illegal-to-read-...
It looks like the True Pundit article (linked above) is the original source for this claim, which is sourced as "according to State Department sources". Then there was a wikileaks email…
Reading this and then going back and reading his SF arrest story (linked in the article) is a real contrast.
There's a YouTube channel "Bigelow Brook Farms" where the broadcaster designed and built a geodesic dome greenhouse (lots of passive solar) and does year-round aquaponics. I think he lives in Delaware or somewhere in…
It varies slightly by state, but many places you can have up to 750-1000 watts and up to 20mph unassisted on flat ground and still have a bicycle, meaning no license or insurance requirement. You'll typically pedal…
If they're on dimmer circuits, they could just be cheap LED bulbs. Even if the dimmer is all the way up, and even if the LED bulb is marketed as dimmable.