131–140 of 149 posts
Its clearly being marketed to disabled people as a mobility device, which makes it a wheelchair, and makes it a class II medical device that must have design controls.
He's in for a rude awakening by a visit from the FDA.
Earlier quoted context omitted.
> I think you also would need to guarantee that both engines are aiming for (about) the same speed, even in corners or when tire pressure changes. That might require something technically similar to ABS. Equal torque is good enough. They'll settle to speeds consistent with turning, etc. Since they're independent motors, you don't need to worry about the case where a wheel is spinning stealing all of the torque. > Als…
> Equal torque is good enough. Eh, you'll still want to redistribute torque if you're planning to accelerate hard. After all, accelerating shifts weight onto the rear wheels, giving them more traction and the front less. Front wheel skids aren't acceptable as you use them to steer. And limiting your rear wheels to the amount of torque that would make the front wheels slip means you're leaving a fair bit of performanc…
Or you can just size your motor(s) a little smaller in the front. Or just cope with this.
> And presumably getting more performance is the whole point of going 4wd!
Being less likely to get stuck and not be able to put down torque at all vs. a differential and RWD is the big performance win. Being able to run each wheel precisely at the limit of traction is great if you want to be quick off the line, but that's not why most off-road vehicles are 4WD.
But I have to admit, I saw "not a wheelchair" and was a little disappointed that it wasn't a strandbeest chair.
Can anyone point me in a good direction to start making something like this myself? I've dabbled with arduinos but never really large electric motors and battery packs. I think it would be a lot of fun to make myself an ebike or whatever this thing is.
I'd look into those user groups for info.
Most of the comments have criticized the price point for what you are getting; however, I would say this looks like a great quality of life tool for disabled individuals. If you are wheelchair bound, there are a number of terrains that a traditional wheelchair will not operate on. They even point this out with their rig on beach sand. There are designs that handle sandy terrain [1], but they would not work well on ot…
The price point for the beach wheelchair you linked is $2,440.00. That's about half the price of this rig, and it does not get you to the beach. You need to have (and park/stash?) another wheelchair for that. Oh and you have to have someone push you. By the way, I read @codekansas' comment [1] not as a warning about feature creep, but as a comment on the inertia in the medical industry (emphasis on "industry") versus…
That being said, I'm kinda more partial to the adaptive mountain bikes like the Sport-ONs[1]. Two wheels in front, one powered wheel in back, and a more "aggressive", sporty posture for the rider. Clearly a different market and twice the price as the Rig. It seems to me that the Rig could be a lot more comfortable and competent with some changes.
Jeremy P. McGhee[2] seems to be a reseller and booster of them.
Here's a video of him and another guy riding them along with a friend of mine (the guy on 2 wheels).
The Rig with it's capability for cargo, reminds me of an industrial bike like a Worksman[4].
[1] https://adaptivemountainbikes.com/ [2] https://www.facebook.com/jer.mcgoo [3] https://youtu.be/-IIQbD0hwto [4] https://www.worksmancycles.com
Something that is not a wheelchair is the Genny. I used to work there in IT Dep. many years ago and still i think is the only real useful application of a Segway. And the best part it doesnt't look like a fucking wheelchair, when i was trying it many people stopped me and ask if they could try it. luckly for me, I'm not paraplegic so they had a ride. The only const: Is not that cheap, 20K Euro. But if don't live in a…
> if don't live in a retarded country Probably not the best terminology to use on a post about people with disabilities.
You've obviously never hung around with people with disabilities. "Political correctness" is not exactly their/our long suit.
One of my favorite experiences was watching a group of people with learning disabilities call each other "retard" and crack up every time.
Don't even get me started about Deaf people and the jokes they make about people that can hear when they think you're not watching.
Earlier quoted context omitted.
It's because it's not a wheelchair, so it doesn't need to meet the regulatory standards, nor does the insurance middleman pricing kick in.
And one might argue, it isn't a usable product without assistance. Per the video, she couldn't even lower the handle without him to exit, and it certainly isn't getting in/out of even wheelchair converted vehicles by itself. Not to mention electrical power (Vs. gas in the competition) definitely could result in the user being stranded, even if it has a power-usage monitor (given how environmental factors can impact n…
This really looks like something that can be improved relatively easily. Instead of disconnecting, the pole could slide along the bar when released and click back when raised again. In other words, it's either an early implementation issue, or a cost saving trick, not a spec problem.
Most of the comments have criticized the price point for what you are getting; however, I would say this looks like a great quality of life tool for disabled individuals. If you are wheelchair bound, there are a number of terrains that a traditional wheelchair will not operate on. They even point this out with their rig on beach sand. There are designs that handle sandy terrain [1], but they would not work well on ot…