Update: 10-22-17. KRONOS K70 GB. $50. 243 on list!

The testing I saw some time back was a simulation, with a reflector on the mcpcb but a solid heat sink underneath. The heat flowed into the heat sink in a pattern almost identical to the output of the light up top. Given our light has a driver bay and thus there are re-directs, proper positioning of fins is critical.

I’ve been drawn to the Eagle Eye X6 for this very reason since it came out and I’ve made some pretty intense little monsters on the X6 as a host over the past few years.

It’s a delicate balance, heat sourced and heat removed, quite a dance really. Simple changes can throw off a nice design, or make it better, everything in it’s perspective of course.

Really?
Questions asked not answered?
Come on this is your debut as commercial party!

EDIT below this:

Oh man,again with the rude? Well for this I can’t feel bad or se what is so rude about it, would have asked for engagement if a seller started a thread introducing a light, got questions and only reacte “thanks for interest” and not answered any questions, but the rude markings make it easy to find the post might t be needed later down the path.

Ah, good!
Questions are edited in, let me see what I could have missed from the OP in relation to the many questions:

1 question:

yes partially answered, see remark about S70S below.
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1 question:

the S70S has 5 minute stepdown, this was received very well, see remarks about S70S (which you sem to have missed to come out months ago)
The S70s with its longer stepdown period still preforms pretty nice in the heat department, it has been tested and spoken about on BLF a lot :wink:
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1 question:

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2 questions:

Nope not answered yet, also not in OP.
here the thicker integrated shelf is addresses, would probably not make much difference but adding no costs to the making for sure. More on this later when Dale and Fritz chime in.
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3 questions:

Nope not answered in OP (it almost seems like you guys missed the S70S coming out with the same heavy OP reflector you show, a moon mode in the driver, all it seems now you have asked Thorfire to do is a long click to reverse and bypass the sensing resistors and think this is all a huge improvement over the S70. Yes guys, the S70S driver with its moon and beacon side led was indeed an improvement but it already came out months ago :wink:
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1 question, that modern XHP70.2 again:

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3 questions:

1 fins around the and below the ledshelf?
2 head in one piece? (again this question)
3 use the reflector as part of heat management?
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1 question:

Ah since you seemingly missed the launch of the S70S, let me bring you up to speed on another thing that has been going on on BLF in your absence, the friendly yet heated ( :slight_smile: ) debate about the S70/S70S and L6. A major advantage the L6 objectively has over the S70 and S70S is the choice in LEDs and tint. Since you seem to try to get design features of the L6 combined with the S70 and S70S you really can make an objective step forwards in tint/led options here.
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2 questions

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1 question

There, you see, even a simple “we will answer questions in due time” is better then not saying anything, for the questions will pop up again :wink: better address them or say you will as you now did so people can know it is taken into account.
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1 question:

seemingly about the two part head (so another question about this)
But it was about or also about the shelf itself:
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1 question:

In due time, Miller.

In the meantime, I am wondering if you diligently read our original post all the way through? Some of your comments and questions are already addressed there…

Cheers

I’ve got a couple 26650s sitting around doing nothing, why not

In.

Put me down for two please: )

S70, it’s already there :smiley: !

I’m in for one. Thanks looks great !!

Really interested in this part….

The KRONOS K70 was designed in cooperation with ThorFire, and based on their beastly S70. Originally, we only planned to upgrade the internals/UI to fully realize the potential of this light. We soon came to the conclusion that a re-design of the host was also needed to overcome some design issues with the original S70. Therefore, the KRONOS K70 is not just a simple re-design, but a new light with plenty of oomph. Our goal is a walloping 8-9 amps!

Please check out the prototype/development pics. We will update with pictures and specifications after samples are received and tested:

Wondering if it had something to do with this part of the design?

Care to elaborate?

Look at the cutaway drawings Kawi, it’s still made that way…

2 pc. Head yep! Talking about the amount of material removed from the shelf, you only need 2 lead access holes and 2 hold down holes. If I was making a XHP70 Hot-Rod I’d want a full shelf, that’s just me. Unless I’m missing something in the rendition cut away?

Just wondering…….

Definitely in for one!

In for one, please.

interested in one

Hello,
Please add one for me.
Thanks

interested in one …

@Fritz15

+1

I was thinking that is exactly what the C8 makes such a good light, fins on the right place, good construction, good heat transfer especially the new type with integrated shelf, so this might be a good guideline for manufacturers, instead of trying to re-invent the Wheel.

I’m in for one also. Thanks.

I agree that you want more surface area (fins) near the heat source as this will increase heat transfer through radiation. This slows down and hopefully limits the max temperature of the flashlight.

To sum it up, lots of mass around the heat source helps transfer the heat through conduction (from LED into the metal), then lots of surface area around the heat source helps transfer that heat through radiation (from metal to surrounding air).

Please don’t use an analogy of liquid spreading in zero gravity. This is way off. Liquids, like water, in zero G don’t really spread, the surface tension keeps it together as I’m sure we’ve all seen videos of astronauts playing with water. It’s a bad analogy and may confuse others. It certainly confuses me, at least.

In order to really understand what we are seeing here, we need a cross section view. (I could flip flop the thermal images from these same exterior designs just by manipulating the internal shapes)

Also, where these images taken after the same time frame? I assume so, but want to make sure.

I think one thing to take into consideration is that the above does not solely compare thermal properties of fins between led and reflector vs fins between led and batteries. The two lights are of a slightly different design as well. For example, the fins on the cooler running light are deeper.