Its true. I also use red shrink tubing on my battery packs and red electrical tape wherever possible to increase performance in the electronics. I would highly recommend painting your legs red if you’re serious about increasing top end speed. And make sure you use a red razor to shave them first for the highest performance shaving experience.
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And no problem if you cut youself, red is still good.
shave so hard you get cut everywhere and there is blood all over you.
SPEED and POWER is worth to sacrifice some blood to lord SKATAN
the power of Skatan compels me.
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What percentage of ‘‘efficiency’’ did you choose?
I think there are people who get closer to theoretical top speed, especially if they are lighter and not heavy.
70 percent
Ok, already though so… Well, I’ve run the calculations for 2 boards/setups using data from what people claimed their top speed and setup were. The speed was way higher… something more like 80-90 efficiency…
But you should also ask around… as I still have not completed my build yet and cannot give any data of the real world situation…
Btw - I like to use this calc:
http://217.118.128.188/tests/ev_calc.html
It also gives the ability to estimate motor rpm and motor amps (although, not so sure about the speed estimate)
i have always reached my theoretical 100% efficiency max kph (calculated with 36V) in slight downhill slope scenarios (talking 5% slope max here) and never fallen short more than 2-3kph on my theoretical max on perfectly flat ground.
example with my current vanguard: 10S single SK6374 with 16/36T & 90mm tires, theoretical max 45kph, FOC max on straights 41kph, BLDC max on straights 43kph!
The difference in max speed between FOC and BLDC seem to pretty negligible then.
I have those speed trap things that measure speed and flash it on a display to get drivers to slow down.
For me 80% efficiency is accurate TS for flat ground. 23 mph flat ground.
FOC/Ollin Vesc R-spec 190 8s 97 mm 16/36t
could be the different voltage we use to calculate theoretical max speed. if I use 10S = 41.4V fully charged (in my case), my theoretical topspeed would be actually 52kph and then 43kph bldc topspeed is 82%. if I use 36V however, I got a theoretical max of 45kph and 43kph is 95%.
yeah I use the nominal average to reflect top speed during most of the packs charge.
It would be great to get full voltage top speed all the time.
That’s a cool topic, maybe we could change the title of the thread to “Top speed and efficiency”. I would be interested to see more stats.
I’m reaching 89% of the theoretical max. My calculated max is 44,6kph. I’m able to get to a max of 40kph on flat ground only with a full charge though (41,7 Volt) and fall back to 37kph when charge is around 50%. Never checked voltage at around 50% charge.
Subjectively would rate overall efficiency more like 81%
10S (18650) 36V, 83mm wheels, 190kv single 2200W, gearing 15/36, 15mm belt setup, VESC BLDC, rider weight 67kg + board weight 8,2kg
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I think everyone should include riders weight as well. Can imagine that has a big impact on the efficiency calculations…
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dont think it has a big impact - once you are rolling, the only impact riders weight has is the deformation of wheels!
@whitepony so if a 60 kg guy says he gets 50km/h top speed, my fat 100kg ass will also get 50km/h top speed?
if you have the same surface and drag coefficient you “nearly” will … your tyres deform a little more which costs some energy.
otherwise your weight only plays a role when you change your speed or when you go uphill!
Ooooooooooooooooooooo that’s good to know. At least my heavy ass won’t be a heavy and slow ass 
I reach my theoretical top speed at 41 km/h (measured by GPS) on my build. 