Low-cost copper pills, spacers, optics, drop-ins (Updated 23/10/2022))

ok Im in for a few of the c8 kits. Honestly Im not crazy about the design if the fins were tapered to make the head more of a cone shape it would be more aesthetically pleasing.

I like it. The way I see it this is about performance and functionality, not aestethics, and the fins taking up basically all the avaiable space mean maximum heat dissipation in this form factor. Though depending on how well the heat can travel down the center tube the last fins might not do much to help and so tapering them might have no perceivable impact on performance.

I agree, i do like the idea, but i dont’t like the shape of it.
It’s eeeh… how do i have to say it briefly?

ugly

I’d prefer more the classic flashlight shape with large fins, something like this quick sketch

just my opinion though.

I havent made tests or even software simulation, but walls thickness was calculated to avoid heat transfer limitation.
Target of this project - increase consuption power affortable for your hands in real usage. Unfortunately, I cant anodize this batch (will probably try next one) - this could be a little improvement in heat radiation.

I’m probably in for batch #2 especially if I can bundle something else with it to save on shipping (m2 quad perhaps). I also think the last two fins could be tapered slightly. Maybe take 25% material off 2nd fin and 50% off last fin for a good stair step or maybe 33% and 66%.

Crude photoshop, not actual product:

I was worry how rigid will be actual head. Thats why last fin is thicker and 1mm bigger diameter - I wanted to prevent bending after falls.

I think most likely situation it drops on bezel so hope for that and dont worry about the rest. Even if it dropped on its side that would only save it if it hit something flat. Anything with an edge could still damage inner fins either way.

That looks much better!

Much better!
Still, some extra fins could be added, i like a copper head like the S41 for the C8 with smooth bezel, no crenelations.

I have to say that this project become possible only when bare bezel was available as spare part. I thankful to all enthusiasts that shown their interest and made it real. Custom SS bezel could make my set unaffordable.
Im planning to make one tool that will give me simple way to mod convoy SS bezel to famous “foybezel”, but I afraid it will took several months to finish it.

Nice quality VG-10

That is “4)” Shadow VG10

Had some time to build a test sample of last project (forgot to mension this earlier. Lets call it C8TT).
I dont have various of leds and cells so I used old V5 XP-Ls triple driven by 20R cell directly. I dont have regular C8 triple in hands so I could compare it only with X6 triple. Im still not sure that using fet based driver is good idea to show heatsink improvement, please use constant current driver if you can.
I dont think that otf output is good value for flashlight measurements, in most cases this numbers are useless unless you are wearing gloves.
I cant take thermal images or any presicion measurements so I can only share my feelings for now.
Calculations dont show big surface area difference. I wont say how much extra watts can dispread this fins but this is not main achievement.
Right combination of fin thickness and tube wall thickness gives great temperature difference between head and battery tube. This allows to heat head as hot as possible for leds life, and hold the light for the same time.
I left flashlight turned on for 5min and take it after and dont feel it hot, then hold it in hands another 5min without any problem. I cant repeat same with X6.
After I turned it off I put cell out (it had 3.6v left). Unbelievably cold. When I put cell out of 10min working X6 (or even single led A6) I never though that cell high temperature was caused by led power. Surely I had to calculate this earlier, but actualy 6-8A is not big stress for low-res cell.

If you need, I still have one spacer for it.

Recieved mine today, gave it some polish and now it’s good to go :slight_smile:

Today received my package from kiriba-ru! Packaging was perfect. Thank you!!!
EE X6 spacer and optics. Excellent :beer:

PM sent about convoy s2+ pills.

Any plans on those m2 quads?

Yes will restock them in 2 weeks.

I had never got anything shipped from Russia. Just checked my tracking number, and man it does a lot of moving around in Russia lol. There is 19 tracking updates and its still in Russia.
Dont take this as a complaint, I just thought it was funny to see so much updates with so little movement

It is OK. It took 5 days to export, much better than 2-3 years ago.