Archived: the OG noob question thread! šŸ˜€

Anyone know of Pressfit motor pulleys that fit the Boardnamic 220 CNC Trucks and motor mounts

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@Chibatterysystems do you happen to have a wiring diagram for your battery backpack?

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Try posting in here:

https://forum.esk8.news/t/boardnamics-precision-220mm-caliber-ii-hangers/2649/29s/

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k00ky question… everyone seems to be racing for the most volts… 18s…20s…
am I crazy for thinking about an 8s build?

on a super small build I can fit 12s2p 24 P42A cells @60amps or 8s3p 24 cells at 90amps…

I have an over Kv’d direct-drive than I can get plenty of speed if I wanna wait for a few hours for the motors to wind up at 12s or throw more amps at them at 8s…

smart guys tell me I’m a k00k…

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I believe mr @MoeStooge would agree with your approach

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@kook
The input power on the VESC would be:
8 x 4.2 x 90 = 3024W
Or
12 x 4.2 x 60 = 3024W

So six of one half dozen of the other but should see less voltage drop in cells and other components at higher voltage (lower amperage)

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but… if I have more…amps… 1/3 more amps to throw at the motors… doesn’t that push the 6-one half dozen equation to the higher amperage battery?

EDIT:
I guess the concept I’m trying to scheme out… ESCs don’t throttle volts… they throttle and manage amps… (or I’m a k00k)
if I have more P-series I have more amps and the battery will have more amps to give, and sag less…

would the High Kv motor respond more like a lower Kv direct-drive throwing more amps, and whatever voltage the ESC asks from the battery?

Well since you’ll get more voltage drop under higher current load you’ll lose more of the watts to heating the cells and heating the motor I think. At least in the quadchopper realm 6S (as opposed to ā€œstandardā€ 4S for 5" prop quads) or higher voltage spinning bigger props at slower speed is more efficient but I’m not exactly sure how that translates here… Sort of just assume since cars go higher voltage and efficiency matters more there it must be good (sort of cargo cult thinking but it’s why I think higher voltage is probably better too).


In low temp scenarios you might benefit from the higher current helping to heat your cells if they are cold but if storing board indoors then cold cells at startup is probably non issue (just thinking of Tesla’s again they have poor cold weather performance and do a lot of thermal regulation around their massive pack)


You want high current on the motor side for high torque but generally want higher voltage to cut the amps for delivering some given watts so less loss along the way, solar DC systems generally have voltage jacked up for transmission and high tension lines use high voltage to move power with less loss around the grid (from what I gather I’m CS but have some electrician friends)

I agree with all the points you’ve presented… and you offer a persuasive argument… but my premise is that I have a too high Kv direct-drive motor, that I wish to design a light-weight battery for…

not alter the Kv of the motor to achieve peak efficiency at higher voltages…

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Oh yah I mean have at it so long as you’re not going over the erpm for the VESCs or other ESCs it should be okay was just saying why I think 10S or 12S are common gotos. I ran a board on 6S for a short while but that was pretty underwhelming (was relatively low kv motor combo too though).

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Is there anyway I can use the flipsky Bluetooth module and the flipsky vx2 pro with the FSESC 4.12 at the same time? They both seem to plug into the same com port.

The reason why currently 8s is the overall package fit & benefits. With the 8s 800kv 200a on high discharge lipo it means the most possible watts in the smallest package, 5694 motor. With more watts than can be used gearing becomes the bottleneck. With proper gearing heat is now not an issue using 60% of a systems capabilities. With Low kv motors you are giving up watts per motor size. With high kv motors = more watts per motor size but at the limitations of final drive gearing. It’s all about finding a system that will balance and not within heat limits. Voltage does not matter. System balance is most Important. Find a motor rated the watts you need at the kv window that will hit your target final drive. 60% capable watts = load

Most everyone here hits their battery, esc or motor ceilings. MayPop setups.

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Not with a single esc. You only have 1 uart port. If you have two esc you gain a second uart (and brakes that dont suck). VX1 is a better option in your case.

@Coreywolf or get yourself a uSplit

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:arrow_up:

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Although, didn’t ricco say he doesn’t recommend it with remotes?

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No idea. Just serving hot, fresh links to customers.

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Might be a dumb question but I have 2 Boosted motors hanging around and I was wondering if they can be used on a focbox Unity, is the connector proprietary or can it be adapted to work ?

ive seen some talk about double kingpins, what are the advantages to a double kingpin vs single one ?

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Not the best answer to your question, but it kinda looks more dope on certain dropthrough bamboo decks and the carving feels nice, but both look and feel are subjective , not everyone’s cup of tea

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