Thanks for that John. Ran some more tests today, using a longer section of road, running E/W. Temp was 20.0C, and wind SSE at about 30 kph. Didn't factor the...
... but ... higher ... Hello Rob; The % numbers do seem low. Couple of things. That wind value is very strong. And we dont know exactly what angle it is to ...
Looks like I was able to down load the Servo Circuit. The upper circuit is the original wiring, showing the chip and the 10K pot. The bottm circuit is my...
It is not clear to me how the lower circuit works. Is pin 7 connected to the junction of the two 5k resistors? What chip are you using and how does it...
... you ... Hello Elden; I didn't trace out the entire circuit. I see a couple of resistors, a diode and a 10 ufd capacitor, and that 10k pot (that I removed)....
... eliminator. ... wire ... pot ... Thanks, John. I didn't have any luck finding data on a Motorola 12C671 and found the number is used for a memory chip by...
... As ... motor ... 12C671 and found the number is used for a memory chip by Micro, but the circuit looks like a 555 timer with different pin numbering. ...
... Woops - hit the wrong button on that last post Rob; I tried upping the CdA to 4 sq ft but the efficiency is stll down around 30%. Cant figgure out what is...
Not sure what you are referring to John. And 4 sq ft, how big do ya think I am! lol, Anyway, not sure how you figured on 30% eff? I just followed the...
... .......The 4 sq ft I got from the Second Human Powered Vehicle Scientific Symposium held in California 1983. For a rider on a up right, bent over in a...
After numerous variations, I think I've a plan for my Agio. The Scorpion 4020-12 with Wye connection should have Io=0.49 at 9.6v, R=0.060, Kv=312, and peak...
... ...... Ok 23.6 kph = 14.7 mph. Volts = 26 , amps = 15 = 390 watts. Peak watts data is 368 so there's some kind of difference here. Maybe the voltage is...
... 5th ... controller. ... ....Now that sound much different than trhe 15 amps on your chart. That comes out to 201 watts. And if the SS says 112 watts...
... .....Elden, This is exciting news !!!! I will look eagerly forward to hearing about it in action. The the ESC will be operating at full throttle ... ...
John, Next lot of results, I'll post the full lot of data, not just my results. Might save a bit of confusion. BTW, what sort of % eff are we expecting to get?...
... results. ... .....Im thinking 50 to 60% but Elden wants higher efficiencies. and where can the improvements be made/ ....good question. we have the motor...
... By picking the motor parameters and voltage and gearing, the motor will be operating at less than 200W at full throttle above 2300rpm which the peak eff....
... will ... the ... .........So the pot setting on the servo tester will be set to max throttle. This is going to be interesting to see what the end results...
... I hope Kelly is continuing to pursue that idea. I see no reason it wouldn't work as well and can provide assist at any time. I didn't want the friction...
... ......Ifound I had to grind two flats on the motor output shaft tot thee freewhel coupling. The tourque here is extreemly high. ... .....I wondered about...
... weight ... I didn't find a supplier when I was looking, but because of it's size a front freewheel must be heavy. ... The 40mm Scorpion motors have a 6mm...
... ......When you say front freewheel are you talking about the chain ring freewheels like they use on tandems ? ... ........Remember me saying I ground flats...
... size ... ring ... Something like the IPS tandem system. The were trikes at NEHPV that had right side front freewheel and mid-drive motor. Mounted on the ...
I'm curious about the way this thread is rolling, so to speak. An ultra-light assist system would not be used without the human counterpart, would it? Since...
... electrical ... the ... the ... In John's system and those I am aware of being contemplated the assist is only used on ocassion. Most motors act as...
If it is any indication, my 250 watt system, is basically an assist system. Yes you can not pedal if you want to, but at slower speeds. I tend to pedal with it...
... .....The main reason the human and assist are used together is if you only use the assit it has so little power that it doesn't do much. At 100 watts input...
Elden A friend thinks the chip in the servo tester is a pic12c671 Here is a data sheet. http://ww1.microchip.com/downloads/en/DeviceDoc/30561b.pdf John T...
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