skdoo

8 ms·

31.
by skdoo 12y ago
It's needed less frequently. Since the board is powered, you won't notice a bit of extra drag from dirty bearings.
32.
by skdoo 12y ago
One of my cofounders worked on this before we started Boosted. http://en.wikipedia.org/wiki/Boeing_YAL-1
33.
by skdoo 12y ago
Yes, but the added weight of something as large as a 1kW resistor compromises the portability of the board. We're looking into how to do this without adding weight.
34.
by skdoo 12y ago
Founder here. Happy to answer questions. One of the most interesting things we've learned about recently is the temptation to cut corners using cheaper parts or processes or relaxed quality control procedures. It's easy to get qu
35.
by skdoo 12y ago
It's basically impossible with our current electronics to only charge the battery to 95% and leave headroom for regen braking. We could let the battery charge to 100% and then bleed off energy slowly, but most users keep it charging a
36.
Feet-On With Boosted Boards’ New Faster And Cheaper Electric Skateboards(techcrunch.com)
54 points by skdoo 12y ago|50 comments
37.
Electric skateboard's torque can push a car(youtube.com)
2 points by skdoo 12y ago|0 comments
38.
by skdoo 12y ago
We'll figure out a way to make it happen. Email me at community@ and we'll set you up.
39.
by skdoo 12y ago
I'm sorry about this. I wish we had a way to keep the price that low. If you'd like to try one for a bit, email me at community@
40.
by skdoo 12y ago
Thank you!
41.
by skdoo 12y ago
If you want to try a Boosted board, email us at community@. There are different boards, and some are better for different riding profiles. Happy to help you decide.
42.
by skdoo 12y ago
This is a reasonable cost breakdown of our first prototypes. As we scaled up, some costs became much lower and others actually increased. For example, we moved from hobby-grade to EV-grade batteries, because we found hobby batteries tende
43.
by skdoo 12y ago
Founder here. Yup, email us at community@ and we'll set you up with a test-ride. Regarding the legality issue, there are different laws about both electric and non-electric skateboards in different states and cities. They tend to be
44.
by skdoo 13y ago
I'm really sorry about the price increase. We honored the promised price for everyone we asked for money from, even though we lost money on each one. If we could build our technology at the original price estimate for all our preorde
45.
by skdoo 13y ago
Incorrect. If that was the case, we would fulfill all our preorders at the original estimated price.
46.
by skdoo 13y ago
Boosted's battery has 99 Wh of capacity, while E-Go's has 230 Wh. Barring a significant difference in system efficiency, we would guess about a 2.3x difference in range under similar testing conditions.
47.
by skdoo 13y ago
Boosted co-founder here. Our battery costs more than theirs. Range/capacity is one measure of performance, alongside cycle lifetime, safety, power output, and other factors. Did a technical post about batteries a while ago. http:&#
48.
by skdoo 13y ago
Jon Clark is a professor at FSU now, and he's still collaborating with some ex-RiSE folks like Mark Cutkosky (my PhD advisor) and Dan Koditschek. The robotics expertise that Google is assembling is quite varied, which is really interes
49.
by skdoo 13y ago
One cycle usually means one full charge and discharge cycle. So if you discharge from 100% to 50% and then charge it, that's 0.5 cycles.
50.
by skdoo 13y ago
Even in San Francisco, we can't use it everyday. We have ridden it in Seattle and thoroughly enjoyed it.
51.
by skdoo 13y ago
We haven't finished our own tests, but the cell manufacturer's specs have been accurate so far and they promise very high cycle life.
52.
by skdoo 13y ago
A light splash won't hurt, but rain, puddles, and long rides over wet pavement will probably damage it. Wet roads will also be dangerous with the slick longboard tires and will corrode the bearings and other mechanical parts on the sk
53.
by skdoo 13y ago
Yes, we mean "non-user-replaceable". It is easily swappable at our facility.
54.
Lithium Battery Pack Design for Boosted's Electric Skateboard(boostedboards.posthaven.com)
132 points by skdoo 13y ago|72 comments
55.
by skdoo 13y ago
Our engineering team spends much of its time and effort on failure analysis. FEA is one of many tools we use during the design process, and we left out some details in this post for the sake of brevity and clarity.
56.
by skdoo 13y ago
It's possible to get something like an electric Razor scooter for ~$300, but the parts they use to hit that price, like lead-acid batteries, make it a lot less appealing. Just like a car or motorcycle, right now there's a floor to
57.
by skdoo 13y ago
The battery is just under 100 watt hours. The motor power lets you accelerate uphill, but the range is calculated from riding at a constant speed on flat ground.
58.
by skdoo 13y ago
You're right, there's a gearbox on the brushed motor and not on the brushless one. The gearbox is the part with the shaft sticking out, and the motor is the part with the heatsink fins. And you can buy the motors already! We are
59.
Drivetrain Design for Boosted's Electric Skateboard(boostedboards.posthaven.com)
121 points by skdoo 13y ago|48 comments
60.
by skdoo 14y ago
Batteries have improved significantly since 2008, and are still improving. The most important shifts have been in cost ($/kWh), but there have also been improvements in energy density (Wh/kg), power density (W/kg), and cycle life. Some of t

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