Endless Sphere

The chassis wire -switches- lights are 12v, and share many of the Ice components. I most likely will leave a second- 12v battery in it if easier. May make it easier to have a onboard LI battery heater connected for those times it may be needed and no outlet is near by for the overnight ac heater set...

It’s consistent across the entire range I’m aware of. But to your point, now that I looked it up in a table, I find that the difference in gauge for a 2:1 cross-sectional area ratio is in fact 3, not 2. :oops: And the 2:1 ratio is exact, not approximate. Yes the 3x rule works, but that leaves you p...

the approximate ratio of cross-sectional area is 2:1 Yes, and if your into approximates, that is suitable. Unfortunately that only holds relatively consistently for part of the range. Fine multi Stranding, also makes it difficult to compare physically and the open metal wire gauges difficult to use...

ZeroEm wrote: ↑May 11 2020 10:09am The leafmotor from leafbikes Called "black magic" comes with 3mm phase wires, between 8-9 gauge awg Which gauge converter are you using? The term "Gauge" varies with materials. To my understanding, Tradition is from firearms making balls from a pound of lead. Shee...

14S, 7 of the leaf modules should be a direct drop in. You may need check the stock controller programing for a suitable low voltage cut off for Li packs. Put a voltage indicator or alarm on the pack so you don't get too low if your exploring. The BMS I am waiting for will take care of that issue. I...

+1 on the stronger / heavier rim. Glad to see your replacing all the spokes. Any of the ones not broken, would most likely have been compromised structurally. The limiting factor to building the most stable wheels is the rim in most cases. It is what limits how tight you can string it also. It is al...

I posted some of the motor choices in another thread. https://endless-sphere.com/forums/viewtopic.php?f=28&t=68950 The 20KW would make a good flying motor IMO. Listed at 5KG It looks to be able to run on reasonable low voltage. http://mymobilemms.com/OFFTHEGRIDWATER.CA/images/238-50b.jpg With a free...

Flying ebike?

Two 6 - 12 foot propellers? How fast are they turning? Looking like a rc style outrunner would be it as mentioned before if your not needing to spoke or tire it for wheel use. Freewheeling crank set will allow you to direct mount a second sprocket if your planning on adding human power and using cha...

When your tension comes out of the wheel, you end up with one or two of the tighter spokes taking huge loads rather than spreading the loads out about the wheel through many spokes. As most here now understand, the thicker spokes allow for much less stretch and easier to become unsprung with minimal...

It does look like maybe the hole is a bit too big and or thick flange is helping ripping the caps off. All look like that? Is there room for washer? You want the spoke to start load transferring at the spoke bend and not bend and load at the cap base. Your healthy spokes and hole dents should lend s...

For Trials, the pegs are offset to the rear and set high and as inward as you can get for clearance. Crank puts you at potential disadvantage in both aspects. Fresh build could be set near anywhere you wish. Ideal would be a crank set that folds out of the way, and pegs that fold down for segment use.

This one is hard to put a rule of thumb on. Agree, it depends on a bunch of factors and your motor efficiency plot. Wishful that most of the common low cost motors are like a prius motor, but if we use the common plot, we can understand it a bit more IMO. Let say that a moderate target cruising spe...

I sometimes wonder why there seems to be a bit of a black and white division between mechanical / electronic. It has often seemed to me that electronics oriented people want to solve every problem electronically when there can be a perfectly reasonable mechanical solution Thinking most have not fal...

Rotors on most of the electric motors per KW are near equal in rotational mass to ICE race motors. Overshoot! :shock: A bit of clutch mass will mate well. Long term, no doubt that throttle only, with brake and reverse (with the help of more advanced controller brain and proper programing of motion c...

Jr class Gokarts run 28hp 125cc rotex 2 strokes and stall carts movement with the motor revving with gobs of throttle with brakes on and off for some time in the pits before heading out to race and still get many hours on clutch drums. It would not take much pressure to lock them up relatively tight...

Friction is good simple torque limiter for certain. Centrifugal also has the ability to freewheel, roll backwards a bit easier. A combination of the two on a clutch lever could be setup to release motor or engage it if springs were just reversed (compression vs tension) and cable pulled -(compressed...

standard for what? where does it go? is it possible to say "limit torque to 150 N.m ?" Sorry, if you could link to some basic learning resources I'd greatly appreciate it. Sorry, hard to judge where folks are starting from at times. Tons of google results on them, so best to get that at where your ...

Best to give it some extra current to get to cruising speed quicker than to gingerly creep up to it over a much longer time in general within some limits. At starting RPMs you have very low efficiency in the motor, so dumping too much current,will result in a significant amount of it going into heat...

A standard centrifugal clutch with a weaker spring would be a easy way to keep peak torque out and still have some lower rpm torque.

It will just run faster. No issues unless you run it very slow - uphill for extended periods. That would run the motor in lower efficiency range where heat could start to run away. Other thing you will want to check is the low voltage shutoff of the controller as it may be a bit low for the battery.

Once you get above the 57- 58 Rc hardness, conventional files skate across the surface of most steels. Some alloying elements will help create this skating effect. At 60 Rc, you are getting into needing silicon carbide stones to efficiently cut into most hardenable steels at hand speeds. Many steels...

serious_sam wrote: ↑

Apr 23 2020 6:45am

speedmd wrote: ↑

Apr 23 2020 6:03am

With steady state torque levels, Chain loads would increase with more ratio reduction (smaller motor sprocket) and would bend shaft - motor structure more.

Lucky edit

Yes. the world is much clearer with that second cup of coffee.

Most likely all this stuff is on a glide path until c19 settles into a steadier state of affairs. As far a cutting is concerned, most old time wood workers and chefs can tell you that nothing cuts like sharp high quality steel. Carbides, diamond, ceramics will certainly out last and able to cut more...

A larger motor sprocket would certainly stiffen (Increase) the impact of what Aberwolf is describing. A larger rear sprocket would reduce this. Much like jumping on a diving platform vs a diving board. Huge impact force difference if you land wrong on your feet-legs on a ridged platform. With steady...