Every notice how screwed up wheel chair designs are?
No articulation at all, get them off flat pavement and they are fawked.
And the power chairs have a COG that is laughable.
If people like us designed wheel chairs they could do a lot better in a lot of different conditions.
I'm not talking about cruising the Rubicon, just negotiating normal stuff. Uneven ground at the park, curbs, stairs crap like that.
What kind of wheel chair would you design if you had the time, money and resources?