Anyone have a pic of the bottom of that light? Also, doesnāt look like it has a lanyard attachment. Thatās a beast to have to hold for any significant amount of time.
It would add weight to a light but would it be possible to make one with a water jacket in the head? Like the ww1/ww2 machine gun barrels. Canāt remember how long in between as long as the barrels stayed changed so often they could fire indefinitely. Unless something in the firing mechanism broke. By the time one barrel was to hot the other one would be cooled.
Now we donāt use water cooled but it was effective in the marines the saw gunners had two barrels. And a thick ass cow hide glove to change them. But no one ever changed them during a firefight. Unless they started glowing. You know its hot when the round fires off from the heat alone
Was just curious because the machine gun barrels in water jackets arnt actively cooled. And thousands of rounds could be shot before a barrel change. But I guess a steel barrel can take a lot more heat few hundred degrees more then a flashlight can so that makes sense
Maybe they were just using water as to collect the heat due to itās high head capacity.
You would need many litres of water thoughā¦
Definitely not possible for a small flashlight like this.
Way off topic but youāll are wondering. A few years ago went to a machine gun shoot at Tiger Valley gun range in Waco Tx. One of the collectors had Model 1910 Maxim Water Cooled Machine Gun. He used a little radiator fluid and lots of water. Belts are 200 rounds long made of canvas with brads. In 7.62x54r hr fired belt after belt, cyclic rate was rather slow. After awhile with the water cap open you could see boiling water erupt out. Heād pour another bottle of water in. Around 0:12 in you can hear the guns slow cyclic rate chugging along Tannerite vs Nissan - YouTube So it cools with lots of water mass. Properly working they are attached to a water can that pulls water into the jacket.
Interesting video, I have wanted to go to that shoot for some time.
The reason the water cooling works on that gun is not the water itself but the phase change that turns it into steam.
The phase change takes a LOT of energy which is absorbed heat, the steam then carries the heat away from the barrel.
If the water jacket was sealed, well first it would explode from the steam pressure, but it would also not keep the barrel cool, in fact a large hunk of metal would work better, fins would work even better.
Now you could make a water cooled flashlight and it would keep the light at 212F degrees (or 100C) as long as you kept the water jacket full. But adding water and having steam boiling out of it come with their own set of issues.
Very true, although if doing this I see no reason to go for anything less then 100k lumens. That should be around 1250-1500 watts of power and would boil water faster then your microwave. Run it off a lipo battery pack and have a 1L water resivor. You should be able to run the light till the battery dies with that, depending on how large of a battery you use.
It could work, it would only weigh 10lb and by the size of a toaster.
Anyway, back to the thread topic. Someone at SHOT Show please finagle a release date, run-times, and step-downs for this light from their reps. Thanks.
Iād estimate 12 cells (in a 3x4 carrier/pack), since the total output on low is 17500 lumen hours (35 h * 500 lm) and one 3500 mAh 18650 cell can total about 1450 lumen hours with a Cree emitter and an efficient driver.
Interesting way to measure output āenergyā, like watts hours but with lumens Would be nice to integrate this to flashlight specs to measure total efficiency but this is dependent on which cell is being used.
I feel that 6,000lm mode should be more than 100 minutes, each XHP-70 is putting about just 1,000lm which is in a very high efficiency range.
Havenāt see that runtime label before. Yeah it make sense, probably the head is very large for the body to look so thin/normal, almost like the Indimidator series with the 9x, which were 6*18650, reason why I asked.
Now seeing the video of the X9, the dude says 8*18650 3500mAh.
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I see a rating of 370meters of throw that means around 34Kcd, so a big flooder, without any exaggeration.