Device

" is there any way to incorporate this decelerating power-routing into only the break system? Sorry, I like to experiment with things unknown " Sure. in cars, the charging function is unnoticable as you coast there isnt much drag at all. (you can charge a car battery on .5 amps as long is there is more power going in than comming out) When you hit the brakes, the effect is essentialy "throttled" to produce enough drag to help the normal brake system slow the car down. I'm not well versed on the internal construction of these large motors and how they achieve the differential drag on demand but its a subject of study in my work and I'll report more as I learn. Edit: Meh.. there are some complex mechanical workings that aid in the drag effect that would make it impractical for this. At least now. I think we should focus on the go and worry about the slow later. no one needs to stop. WE are WILD right! Im looking into brushless electric motor design. I see some people on youtube have some working concepts most of wich seem to encorporate an external motor driving the wheels via some sort of mechanic linkage. I personally envision the wheel being part of the motor with its inner lining as the reluctor and the coils affixed to the axis. Need to figure out: 1. How much kenetic potential is required to propel a person of average wieght beyond the force of there own skating action. 2. What is the minimum motor size currently in production (or in theory) that can produce the required kenetic force for a resonable sustained amount of time. 3. What is the best configuration to achive the torque, speed, and duty cycle requirements (i.e. AC motor, DC motor, LI battery, other??) and list the pros and cons of each. This I feel is the most challenging area. everything else can be designed around this.

Hi Guys. New to the Boards. Nice to meet you all. I have some mechanical background and always take interest in techy things like this. Just wanted to chime in with a few ideas and observations that might help. First I'd like to make a comparison to some of the math involving the power needed to make these things possible. I didn't actually do any math on this myself but, I have observed the following: My old 1981 Chevrolet Chevette wieghed over 2000lbs. It only had 60 horsepower under the hood and could get 90MPH sitting on 13" wheels. Generaly what I know about torque in the automotive world is the smaller the wheel, the less power you need to get going. So 156 hp going to ~100-150lbs sitting on 8cm wheels should in theory rip your legs off as soon as you throttle up. Of course top speed would be another factor for a wheel of that diameter.. Now a few thoughts on material contruction... As for the strength to wieght ratio, the answer would probably be in something like carbon fiber or some newer carbon based meta/nano-material that may exceed its strength and lightness. Whatever ya use its gonna have to be durable as hell for standing up to the puishment of the target envirament they most often will get used in. I personaly think the power source and control hardware would almost have to be remote in a small backpack or belt or something to not be taking the constant shock that a typical roller blade sees. Even just normal street skating on urathane wheels is alot of vibrating for sensitve electronics to be exposed to not counting tricking at the increased hieghts and speeds that these would undoubtedly lead to. The wheels themselves whould probably have to be oversized to some degree to get as much potential as possible from such small motors and I would plan to use at minimum something lined in solid rubber to help absorb some landing shock to protect the motors as much as possble because no matter what suspension system you think of to insulate the rider, nothing is in between the motor and the road except the wheel. Perhaps some of those larger off-road board style wheel could be incorporated. The typical sized hard urathane wheel just isnt going to be ideal IMO. Now for the motors. What I know of the electric motors in hybrid cars is they are actually 2 way functionality. The source energy can be put into the motor to increase drive and the execess energy routed back to charge the source when coasting. This reversal of energy will also result in a drag on the wheels wich can be a solution to (at least some of) the braking. At least to a point when you arent going any faster then you could without power so stopping would be as with normal skates at that point. As for controlls... I think a simple hand-grip rig incorporated into gloves would work. right hand action for going, left hand action for slowing. a wristwatch display inline to the hands could readout for your speed and any other info necessary. About performance... I would not think so much about launching a person from 0 to 45mph in break neck time. I would instead think more about augmenting what is already available. I think everyone can agree that it would feel silly just standing with your legs frozen in place letting the skates do all the work. People are going to still perform the motion of "skating". It feels right and doesn't look funny since you are wearing skates after all. plus its exorsize wich is good for eveyone anyway. A person seriously wanting to perform in this arena is going to want to be in shape anyway and the more they can propel themself, the power augment of the skates can and should only add to it. OK i think thats all i have for now. Hope it helps some.