šŸ–¼ Reply to ā€œPictures and nothing elseā€ thread_2020_summer

You think you quoted them enough?

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Nope :man_facepalming:

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That’ll buff out.

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@rafaelinmissouri, how did you manage that?

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Did you try turning it off and then on again?

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Nah. Jbweld it. Its fine.

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I don’t even think you need that, probably just butyl tape

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no clue dude.
I have had these motors a while and in a few different set ups… but they were in pretty good shape… I recently put them on the Khymera which is a belt drive… I run the belts pretty loose.

I went for a ride Tuesday at lunch time and 6 miles in I hear weird noises and eventually see the motor being weird… I thought I blew out a bearing…

rhe universe new I really wanted BN 6384s on this board anyways…

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I’m surprised we haven’t seen a single goth zenith yet

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Goth board gang xD

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I wonder what’s the darkest board you can make, no silver anywhere

Can you get black axles and bearings?

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Vantablack everythanggggg.
Heat would be problematic.
I for one absolutely love dark mirror finish, maybe with some red or purple details, and spiked axel nuts.
Black bearings exist. Bushings can be dyed… ive got black wood stain and quartz sand on deck… now how do we color the axels themselves?

yes Trapstar,The outer shell is carbon fiber

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paint it in vantablack

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Gang gang.

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Vantablack is an incredibly efficient ā€œblackbody radiatorā€ (infrared) and can easily shed itself of any (tiny) heating due to visible light absorption. In fact, Vantablack is so efficient that using it could result in a slightly lower overall temperature for whatever it is coating as long as that heat has somewhere to go.

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Nice! I actually didnt know that, but its interesting.

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So all heatsinks should be vantablack for efficiency?

An unnecessary expense IMHO. Just any flat paint or anodizing (doesn’t need to be black) can increase the terrible IR-emitting efficiency of a metal. But if the heat is just radiated onto other nearby things in an enclosure then you’re not doing much overall.

And if the heat sink has fins that are ā€œfacingā€ each other than each fin’s IR emissions will just be absorbed by the nearby fin. The shape of the heat sink is very important as radiative (infrared), convective (airflow, fan cooling), and conductive (connected to other metal) cooling all need a different shape/configuration for the heat sink.

The percentage of cooling possible via radiated heat loss, versus the other methods, might not be very high as it all depends on the setup. A polished metal heat sink will be lousy at cooling via radiation (emitting IR) but in lots of air flow it will be very effective at cooling via convection.

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Makes sense. What about some kind of special, conductive paint?