and a similar path ā Iāve been wondering why the inside of the X6 head is so empty, for example.
Does the A6 with the S2 pill conduct heat out to the exterior as effectively? Need foil wrap added?
Thatās the point. If you have two similar hosts(S2 & A6) both with similar copper spacers added running at similar currents the one that gets hot quicker has a better path. The heat is reaching the surface faster. To āhandleā it better, ie have just as good a heat path yet stay cooler one would need to either have more mass, more surface area, or have a bigger mitt wrapped around it.
I donāt think thatās the case here. My S8 was clearly able to maintain max output much longer than the A6. Also they are not very similar IMO. I didnāt weigh them, but the S8 host seems heavier than the A6. I think the size difference in the heatsink/spacer and perhaps the fins on the S8 might be the difference here.
Also I found the S2+ spacer was slightly too small for the shelf of the A6. It would have been more effective if it was a tighter fit.
Or the surface treatment ā emissivity is the measure of being able to get rid of heat by emitting infrared, and it can vary enormously even when the visible appearance to human eyes is the same.
Anyone tried doing infrared imaging of the lights, say, tailstanding over time?
Itād be interesting to know not only how fast the surfaces get hot, but how hot they can get and level off ā without frying something.
Personally, Iām looking for the steampunk revolution to finally reach flashlight design ā a little water jacket enclosure with a safety valve that pops and gives us a steam whistle as a heat warning.
Of course youād have to be very careful not to have a boiler explosion on your hands. Superheated steam is terrifying.
Giggle Youāre right. Steam is scary. But someone should totally build a water cooled light for the next build competition complete with a popoff valve!
Edit: Sorry. Way too easy to go astray at this place! Lolā¦.
That makes sense in the way of getting the heat out and into your hand but can someone explain the difference between metals conducting vs. shedding heat? I know thatās why the x6v2 was not left completely stainless.
Bright, shiny metal is smoother on a microscopic level than anodized aluminum which is porous and rough giving it more surface area for heat exchange to air molecules. A vivid example differences in conductivity would be to hold a foot of bare awg 12 solid Cu in one hand and a foot of clothes hanger wire in the other and put the tips of each into a flame. It takes a lot longer for the heat to reach your hand moving up the steel wire so it would take longer for the heat to move through the steel of the SS part than the added Cu.
Convection (transfer of heat as vibration from surface to fluid molecules that then move away, carrying the heat away, because of density change with temperature change);
Conduction (transfer as vibration traveling through the molecules of the material);
Radiation (emission of photons)
Complication: conduction through the metal to your hand, and through your skin to the capillaries and the blood, carrying it away ā¦.