19.6 to 20mm increase is only 0.4mm in diameter. Personally I don’t see why the tube needs to increase in OD, it is chunky, hardly thin-walled. And the only bit that might need to be slightly larger is where it threads into the head, to allow a larger driver retaining ring to be fitted. But there are also other ways to do that without change.
To take a 21700 that’s requires at least 3mm increase in diameter and 5mm in length, knocking-on to every other dimension. Becoming a quite different much larger torch.
The 21700 cell dimensions are not well standardised, it’s can still be a lottery as to what fits with what, choices and availability are limited, and prices higher.
Then those wanting to keep using 18650s, like me, have to figure out how to adapt them to fit into something 3mm wider and 5mm longer, without rattling or running out of spring length, or adding a magnet. For no practical benefit. If I anticipate needing more run time I just carry a spare cell in my pocket. Which I usually do anyway, saves topping off the cell in the torch every outing “just in case”.
I’ve standardised on 18650, 26650 and 18350/16340 for all my torches, and don’t intend to buy any new cells for a while. A 26650 torch does everything 21700 can, and takes an 18650 with a simple sleeve. And fits my hand better, when I want a chunky torch. Usually I don’t.
Threads change to square, maybe more threads. (i sended a pic i found on the net showing a square thread but it only showed a few turns. It was only to show the kind of thread.)
3.thicker shelf, deeper finns like the pic (They send a drawing. But they used almost all mass we added to make the finns deeper and add bottlenecks again. I corrected the drawings to show them that we woud like a better heatpath. The lower finns are still a bit deeper. But now there is enough material to get a good heat transfer inside the head)
bigger Beryllium Copper Spring (CU-BE) ,maybe 0.8-1mm. (I do not know if they contacted BlueSwordM for the specs. I will contact him to ask)
5.reflector maybe little change, not decided, still at design (The 7mm LED hole is on the plan. And they try to get more throw out of the limited space)
18650 battery from 65mm to 70mm is OK. (I made it a special point. This should be really work out and they will test it so no thing like the last time should happen)
As to the driver or UI, will send the DXF to lexel when design is finished.
Tailcap change for Tailstand is also on the list but not mentioned again (no big change)
They looked into the retaining rings. At the tail everything is ok (the last D80 i bought had no problems with the retaining ring. The tube did not make contact to the brass ring in the tailcap. So no need for a change there (only make it fit the slightly bigger tube. At the head they will make a change. First ideas are inn but they are checking if its working like we want. Please give them time. They are working on it.
Little status update.
I got the message that the factory is very busy these days. But they hope and try to get the Host design ready next week. I do not know how far they are with the driver and the springs but when i get news i will post updates here.
And i got a drawing of the tail. The tube should only make contact on the outer rim. So the retaining ring will not come loose. No need for a LH thread.
And a small side notice. I am writing these finaly lying in my own bed at home.
This feels sooooo much better. And without anybody snoring i hope to sleep like a baby wrapped in huge fluffy cotton ball!
I still need surgery in the near future because the internal scaring is making big problems (can not sit to long without pain and other more serious effects). But that is not happening today or tomorrow!
The DXF files for the new 20mm driver are on the way to Lexel. The Host design is in the making.
The factory is still very busy with customer orders (titanium lights).
I try to get a few more background information about the company (i find it very interesting to get a bit more information about the structure, size. . .). Things like Do they only produce under the LuckySun brand or do they produce things for other companys. . .
If people are interested in this stuff i will let you know (if i get a peek behind the curtain).
And they will also look into TIRs. Maybe the right TIR could give better throw or at least a better more uniform looking beam (less artifacts).
Driver is planned for Bistro OTSM, but I also added pads for e-switch, just if someone want to mod it that way
I marked the cut trace if someone wants to use as well lit switch to separate that pad from battery voltage so can be powered over R1 from MCU
I love the d80 with the fet +1 from mtn, the new driver with more 7135s will be even better. Is it possible that this light would be offered with the 3v xhp50.2 in it?
The question about the 3v xhp50.2 came up before. As a company you can not sell this led with a FET driver. It is a liability issue. As a modder we can do what we want.
If we blow ourselves up that is our fault. But the shit hits the fan if something like this happens (if you would sell this kind of hotrod to muggles something would happen!!! For sure!!!) with a factory light.
I do not see something like this happen unless you use a regulated driver and limit the current to a safe max. Also not the best led for a dedicated mini thrower.
67mm aspheric? Do you have a link? My last aspheric was the HT35 (not impressed with the design. Fully zoomed out the usable aspheric surfave shrinks to ~35mm. I have a solution for that to get up to 55-60mm usable surface. But have to find a way to mill parts away. But without a round table or something similar i do not know how to do it properly.
