Water Cooled Flashlight Modding a MT35 PLUS RE-MODDED

LumenMax · 2019-12-26T22:01:16.000Z

The_Fat_Controller:

…though i think id pass on the XHP70 and look more towards SBT90.2

This. With water cooling and the head size, he can definitely try to power the SBT90.2 @ 9A+.

The_Fat_Controller · 2019-12-26T22:09:13.000Z

LumenMax:

The_Fat_Controller:

…though i think id pass on the XHP70 and look more towards SBT90.2

This. With water cooling and the head size, he can definitely try to power the SBT90.2 @ 9A+.

its got to be the better choice?

CNCman · 2019-12-26T22:17:23.000Z

The_Fat_Controller:

EasyB:

Interesting project. The copper heat exchanger looks really cool. How do you plan to move the heat from the water to the air?

Why do you want to use an aspheric lens? It will increase throw by a bit? Light collection efficiency of a lens like this is only 25-30. Whereas a reflector puts 70+ of the light into the beam. If you really want to use a lens I might consider using a precollimator lens which can double the light collection efficiency.

Not convinced its quite as bad as that, I have an L2 setup with a culnm1.tg & 5a driver, I also have exactly the same combo in an aspheric setup

The L2 is making 18Klux at 5 meters , the aspheric is making 24klux at 5 meters……

Lens diameter and FL is a huge factor.

.
That was part of this crazy idea to have a big zoomie, but the shape will not work because the focal point of the aspheric lens will interfere with the reflector, so we will be forced to drop that for now. Using a precollimator lens is above my pay grade, not sure I can handle that, but the door is open that we could try. :+1:

CNCman · 2019-12-26T22:46:58.000Z

Thanks Everyone for the comments…
.
But I want everyone here to know that YOU guys are the reason for me trying this. I WILL NEED YOUR HELP on the technical things. When I first joined BLF, YOU guys love of flashlights and friendship helping each other made me want to contribute something. The only thing I have is machining. Everything else about flashlights I am very green. .
.

The_Fat_Controller · 2019-12-26T22:49:55.000Z

It is a great forum , with many knowledgeable and helpful people, I’ve certainly learned a lot in my short time here and continue to do so

CNCman · 2021-03-14T19:37:57.000Z

Got a few hrs in today before Grand-baby sitting time arrived.
Trimmed tubing to a function-able height.
.

.

Yokiamy · 2019-12-27T06:56:35.000Z

CNCman:

Everything else about flashlights I am very green. .
.

Believe me er not, we have all been in that stadium, i have learnt a lot over here.

And by trial and error :person_facepalming:

CNCman · 2021-03-14T19:38:38.000Z

Finishing up some adjustments with the dremel tool and testing the water flow, that looked exactly like I wanted. I will measure the flow rate tomorrow. All the wiring will need hooking up to the driver, that part concerns me
.

.

.

MRsDNF · 2019-12-29T03:12:18.000Z

Looking good.

CNCman · 2021-03-14T19:39:17.000Z

OK, time to assemble and get it ready to power up.
.

.
Drill another hole in that $190.00 light.

.
Spring modding too. And yes, that is a group buy beryllium Copper spring provided by ” BlueSwordM “.

.

.
Some Dremilling.

.

.
Switch wiring confusion.

.

.
All wired up.

.

.

.

.

.
]!
.

.
Just taking a break to watch the Saints game win.
It will fly or die today…
.
.

MRsDNF · 2019-12-29T22:44:26.000Z

I so hope your going to fly.

CNCman · 2019-12-29T23:42:13.000Z

The Water cooled flashlight is a success !!
Here are the last assembly pics for the XHP 70.2 P2 1A LED Lexel 12v 7.8A driver.
.

.

.
The aluminum coil is held in place with Velcro.
.

.

.

Cavitation can be a problem but once the air bubbles were removed it recirculated without issue.
.

.
Even a blind squirrel gets an acorn every now and then.
Surprisingly, it was wired correctly the first time.
.

.
I see light.
.

.

.

.

.

.
I would like to say Thanks to everyone here at BLF that helped giving advice and direction that made this possible.
Next thing to do is gather results and do some testing. For this part, much help from you guys will be necessary, I’m a noob doing this.
If weather permits tonight we will get more pics with phone.
.

MRsDNF · 2019-12-30T00:57:36.000Z

Intense.

SKV89 · 2019-12-30T01:34:02.000Z

Wow GJ! looking forward to hearing its performance!

Yokiamy · 2019-12-30T06:47:56.000Z

Nice !

pinkpanda3310 · 2020-01-02T12:43:32.000Z

Cool!! (pun…?). Awesome project CNCman. Interested to see how much difference your mod has made (with regard to thermal abilities of course).

CNCman · 2021-03-14T14:35:55.000Z

Still getting things ready for some testing on the light and making a Lumen tube to check it also.
.
I was not sure how the driver would handle long run times so we decided to add a copper heat sink to the rear of the driver with Artic MX-4. There is 3mil tape in the area of a possible short.

.
The light was coming on when the battery tube touched the spring and not when seated. So we turned the outside diameter and taped it.
.

CNCman · 2020-09-06T01:51:01.000Z

Finished compact battery holder.

.
Just under 8 amps @ 12 volts. Guessing around 8500K lumens, not able to get accurate readings yet.

.
8 inch lumen tube is not calibrated yet, guessing it’s reading high 2K.

.
Re-plumbing with good tubing.

Beam shots don’t really show how nice it shines.

low ramp start.

.
25010 lux at 6.46 meters is 1,043,707 CD and 2043 meters throw, approx 8500 lumens.
.
This light just blew a mcpcb 1 day after I changed a burnt XHP70.2. I will fix it again with another modded mcpcb.
Texas Ace has a Luminus 90.2 kit ordered I will probably put in, but that will require more invasive work, so I may put that kit in another big light.
.
I know this light looks strange, but it is an experiment in heat control. If were possible to find a very small pump, it would be possible to incorporate the cooling into the head ( no exterior tubing ), and improve its appearance.
.
originally MATEMINCO MT35 PLUS, XHP35 HI, 4 x 18650 batteries
.
I want to Thank the many BLF members who helped me during this mod.

Tally-ho · 2020-09-06T17:58:44.000Z

The water-block is genius, so how about taking advantage of the length of the battery tube for cooling the water temperature ?
Something like a battery tube with milled fins on the whole length and the water pipe going through the fins. Sorry for the 4 years old kid drawing

CNCman · 2020-09-06T12:39:48.000Z

I never thought of going around the battery tube and adding a handle, Good Idea
Definitely looks better too Yes, that is the way to do it, wish I had thought of that in the beginning