[PART 1] Official BLF GT Group Buy thread. Group buy officially closed! Lights shipping.

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Enderman
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The Miller wrote:

COOL!
I added your whole post to post 5 (now dedicated to the reflector, thanks!

You’re welcome Big Smile Glad I could help.
Also helping myself for when I decide to buy a custom reflector from optiforms/phoenix to build a custom light haha
Jerommel
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Hey guys,

So i just photo-shopped this preliminary idea:

The head needs some features still, but i thought i’d share this now.
So i’m still working on it.

The Miller
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OH dang, nice!
still hard to comprehend this is not Uniquefire 1405 size but much bigger

Enderman
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Add a banana for scale Wink

cmflippen
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^That looks much better. I like the smooth head. Just give it some bigger fins and it’ll be perfect.

Jerommel
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Enderman wrote:
The Miller wrote:

COOL!
I added your whole post to post 5 (now dedicated to the reflector, thanks!

You’re welcome Big Smile Glad I could help.
Also helping myself for when I decide to buy a custom reflector from optiforms/phoenix to build a custom light haha

I kind of missed all of that, but i see it’ll be 100mm deep and 120mm wide, which are about the same proportions as a default C8 reflector, right?
mrheosuper
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Common guy, we have 8*18650 here, add a peltiler to it
Jk, i dont want a short time running reseach torch
This render above i dont like it, it looks weak, if i drop it, probably it will dent, and damage the reflector

Forgot my pen

Jerommel
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The Miller wrote:

OH dang, nice!
still hard to comprehend this is not Uniquefire 1405 size but much bigger
The button is still too big, it’s not finished yet.
Just wanted to share what i have thus far.
It’s better to let some pictures speak than to let me speak.. Sick
Jerommel
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mrheosuper wrote:
Common guy, we have 8*18650 here, add a peltiler to it
Jk, i dont want a short time running reseach torch
This render above i dont like it, it looks weak, if i drop it, probably it will dent, and damage the reflector

It’s not done yet.
Head needs some features.
For the rest there is no reason to assume this will be weaker than the other one.
There is some space between the reflector and the head, of course.
I see what you mean though.
Texas_Ace
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I MUCH prefer the Q8 style grip (kerling?) and I also much prefer the more aggressive design of the ordinal CAD personally but I could live with this smoother version if that is what people wanted.

It just looks wimpy in comparison. but thats just my opinion.

Enderman
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Jerommel wrote:
I kind of missed all of that, but i see it’ll be 100mm deep and 120mm wide, which are about the same proportions as a default C8 reflector, right?

I have no idea what dimensions it actually will end up being, they haven’t sourced a reflector yet.
Also I’m pretty sure they will be buying a bulk order from some place that already premakes reflectors, not ordering a custom electroformed reflector from optiforms/phoenix because that will likely cost as much as the flashlight itself.

But those equations are a great way of figuring out the shape based on just height and width, which is all that some places tell you in the specs of a reflector.
Also good for designing a decent reflector for your flashlight if you can afford to get a custom one made Smile It does look pretty similar to a C8 in proportion though, maybe a bit shallower.

Jerommel
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Texas_Ace wrote:
I MUCH prefer the Q8 style grip (kerling?) and I also much prefer the more aggressive design of the ordinal CAD personally but I could live with this smoother version if that is what people wanted.

It just looks wimpy in comparison. but thats just my opinion.


Still working on it.

I do take into account what you all say though.
But maybe i should have waited until it’s kind of finished.
It’s ‘knurling’ apparently. (i always thought it was knurdling).

No, it doesn’t look wimpy, but the head as is now looks a bit easy to dent.
It will be a challenge to get some features on there with my means, but it will both add some strength and prevent rolling.

It looks western in design. European / American.
Purposeful, cool and not too noisy.
…at least, that’s the idea. Smile

Jerommel
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Enderman wrote:
Jerommel wrote:
I kind of missed all of that, but i see it’ll be 100mm deep and 120mm wide, which are about the same proportions as a default C8 reflector, right?

I have no idea what dimensions it actually will end up being, they haven’t sourced a reflector yet.
Also I’m pretty sure they will be buying a bulk order from some place that already premakes reflectors, not ordering a custom electroformed reflector from optiforms/phoenix because that will likely cost as much as the flashlight itself.

But those equations are a great way of figuring out the shape based on just height and width, which is all that some places tell you in the specs of a reflector.
Also good for designing a decent reflector for your flashlight if you can afford to get a custom one made Smile It does look pretty similar to a C8 in proportion though, maybe a bit shallower.

Shallower to keep the base wide, i.e. more distance between LED and refl. surface.
Indeed, the depth doesn’t add to much, it is why most reflectors are proportioned the same.
(but that’s probably all said already).

I like the banana idea ! Big Smile

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Whatever you do, please add a CD/DVD, C8 or Q8 or something so sizes are a bit clearer Wink

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In regards to the comparisons with the L6

Texas_Ace wrote:

The L6 comes stock with around 40W and about 1/3 the amount of metal in the head and I am going to guess roughly the same amount of surface area.

It manages to run until the batteries die without overheating on turbo.

quote from the Convoy L6… XHP70 Beast! thread.

Quote:
Simon did a runtime test last night. The L6 in turbo ran for 80 minutes on two KeepPower 5200mAh cells at which point he describes it as very very very hot.
Oops This of course was indoors with no air circulation so in actual outdoor use the heat should be much more manageable.

very very very hot, and it has fins Silly

Yes I know that was indoors but I have to think about using it with ambient temps in the 30c range so personally I would like as much finning as practical.
note:- that is practical not possible Wink

Cheers David

Nothing to see here folks, move along...

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XHP-35 can’t take much over 3A, if it even takes that. Small spikes will blow it up in that range. Most of us who’ve pushed them have learned to cringe when we hit Turbo at 3A or so. You’ll never see 5A in an XHP-35. But they do tend to run at a Vf around 13.7V when in the 2.8-3A range.

Cooling fins beyond what are now shown are a must. If run time with 8 cells is even considered, cooling fins to accommodate it must also be considered. Think of it like a 1/4 mile dragster. You spend a lot on the engine, are you gonna put street tires on the back to save weight or are you going to use top end racing slicks to hook it up? If this big light can’t run cool, there’s no point in the 8 cells.

Simon might be ok with an L6 look on a large scale, I do not know. But I would assume Thrunite will take great offense if this GT has a TN42 appearance.

Texas_Ace
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pommie wrote:
In regards to the comparisons with the L6

quote from the Convoy L6… XHP70 Beast! thread.

Quote:
Simon did a runtime test last night. The L6 in turbo ran for 80 minutes on two KeepPower 5200mAh cells at which point he describes it as very very very hot.
Oops This of course was indoors with no air circulation so in actual outdoor use the heat should be much more manageable.

very very very hot, and it has fins Silly

Yes I know that was indoors but I have to think about using it with ambient temps in the 30c range so personally I would like as much finning as practical.
note:- that is practical not possible Wink

Cheers David

Oh it gets hot for sure, but it doesn’t “overheat” in that any damage is done.

Like I said, I would like to see more fins myself but others would not. So we will need to see what the best compromise is.

Jerommel
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Texas_Ace wrote:
pommie wrote:
In regards to the comparisons with the L6

quote from the Convoy L6… XHP70 Beast! thread.

Quote:
Simon did a runtime test last night. The L6 in turbo ran for 80 minutes on two KeepPower 5200mAh cells at which point he describes it as very very very hot.
Oops This of course was indoors with no air circulation so in actual outdoor use the heat should be much more manageable.

very very very hot, and it has fins Silly

Yes I know that was indoors but I have to think about using it with ambient temps in the 30c range so personally I would like as much finning as practical.
note:- that is practical not possible Wink

Cheers David

Oh it gets hot for sure, but it doesn’t “overheat” in that any damage is done.

Like I said, I would like to see more fins myself but others would not. So we will need to see what the best compromise is.


I’m trying to put fins also on the part between head and tube, (which can be made of one piece) but it’s a ghastly job with my means…
I call it quits for today..
Jerommel
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DB Custom wrote:
XHP-35 can’t take much over 3A, if it even takes that. Small spikes will blow it up in that range. Most of us who’ve pushed them have learned to cringe when we hit Turbo at 3A or so. You’ll never see 5A in an XHP-35. But they do tend to run at a Vf around 13.7V when in the 2.8-3A range.

Cooling fins beyond what are now shown are a must. If run time with 8 cells is even considered, cooling fins to accommodate it must also be considered. Think of it like a 1/4 mile dragster. You spend a lot on the engine, are you gonna put street tires on the back to save weight or are you going to use top end racing slicks to hook it up? If this big light can’t run cool, there’s no point in the 8 cells.

Simon might be ok with an L6 look on a large scale, I do not know. But I would assume Thrunite will take great offense if this GT has a TN42 appearance.


Well, they all have a knurled tube, a head and some fins around where the LED is located.
I don’t think a conical shaped head is patented either.
But none the less, okay, let’s not make it a lookalike. Smile
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Jerommel wrote:
Hey guys,

So i just photo-shopped this preliminary idea:

The head needs some features still, but i thought i’d share this now.
So i’m still working on it.


wao, I like it Thumbs Up
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So heat is the topic of the day?
Why would this be used in any situation where it’ll be static, on turbo, for the entire duration of the cells? Moving it around a little even while walking will cool it off significantly.
And if it needs to be used while static – turn it down to a lower mode…..

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I like the clean design Jerommel presented. I REALLY like it.
It looks……vaguely familiar. Wink
Clean, uncluttered, purposeful, nice.
Not finished but a solid basic proposal.

A bit more cooling fins would not hurt but for my taste the rest of the head can stay smooth.
Having said that, something to prevent roll would probably not be a bad idea either, but I personally wouldn’t need it.
A sling I would like very much and the head design proposed already has the attachment.

So, we are now in the “heat management and final design” stage?
It’s getting better and better, so Mr. Miller (who apparently lives in France but can write surprisingly good dutch….) pls put me up for two lights instead of just one.

I know just the guy to give one of these beauties as a birthday present. Cool

Grtz
Nico

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Jerommel wrote:

I’m in!!!

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Please, please unclude a C8 in the next renders. Or even better in this renders so far. So we can see how big it is.

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I did not like that last render from jerommel at all.. IMHO Smile

The last flashlight I intend to buy is a Convoy m1 from Charles Wiggins, and maybe I have a “crush” on fins, but in my head it has that “powerful” outside look! But I belive even that flashlight gets hot some times..
And if we have in mind what Simon found out from his test with the L6 = very very very hot…..hello we DO need fins.
You all know that light in any form builds heat, even hid.
So Dale has a good point, you don’t put Street tires on your dragster car….
And the jerommel design looks to be easy to dent, as mention above.

I hope we stick to 5ar’s design in a way..and that we build it better than it has to be, with that chosen led configuration.

Wink

"Do to others, what you would like others do to you.."

-MortyDuck-

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MortyDuck wrote:
I did not like that last render from jerommel at all.. IMHO Smile

The last flashlight I intend to buy is a Convoy m1 from Charles Wiggins, and maybe I have a “crush” on fins, but in my head it has that “powerful” outside look! But I belive even that flashlight gets hot some times..
And if we have in mind what Simon found out from his test with the L6 = very very very hot…..hello we DO need fins.
You all know that light in any form builds heat, even hid.
So Dale has a good point, you don’t put Street tires on your dragster car….
And the jerommel design looks to be easy to dent, as mention above.

I hope we stick to 5ar’s design in a way..and that we build it better than it has to be, with that chosen led configuration.

Wink

In Jerommels’ last design, the head is of a TN42 is shown.
This light has a reflector diameter of 90mm, the BLG GIFGA will have a 120mm reflector.

The TN42 uses a XHP35 HI that gets around 2,15A.
The BLF GIGA will get around 2,5A (I hope). Above that, the gain in lumens is marginal but the increase in heat development is considerable.

Due to the much larger reflector and head, the BLF GIGA will have much more mass and surface area and thus will be able to absorb and dissipate more heat.
A few fins around the electronic switch (and so very close to the led) would do, I think.
Bear in mind that using this light outside (remember, search & rescue) means movement which will provide additional cooling as well.

It would be up to the mathematicians in this forum to calculate heat generation, heat transfer, absorption by mass and dissipation at certain temperatures, but do we really need to go that far?
Just a tought: if the BLG GIGA will be well over 1Mcd at turbo, it could have a high setting at which it would still produce around 650Kcd, the same as the TN42 on turbo, so at “just” 2,15A.
I’m sure that the BLF GIGA will be able to handle heat generated at 2,15A for a long, long time. Probably until the cells are depleted.

Just my 2 cents, that is.

Grtz
Nico

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DB Custom wrote:
Simon might be ok with an L6 look on a large scale, I do not know. But I would assume Thrunite will take great offense if this GT has a TN42 appearance.

Especially if we officially try to build a flashlight that beats the TN42. Big Smile

New WildTrail (former LuckySun) D80v2 Sale has Started http://budgetlightforum.com/node/66255

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Most of the flashlights look alike. But some are horrid looking, some are fine. They might have a problem if you make a CLONE, but this is a completely different light that has nothing in common with them. It is like comparing the S41 short, with Skyray king. Yes they are both tube lights… Yes they look similar… But that is it.

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My opinion is that TN42 appearance is not suitable for the diameter of 120mm reflector. 

It's all well and good on paper but should take care of the production process and the things that can be easily implemented without the production costs increase. 

Jerommel: You have to pay attention on proportions: 120mm diameter reflectors, place for a shoulder strap to attach on head, PCB driver size 46mm, driver need at least 10mm of height clearance to the bottom of the shelf, tripod mount .... on tn42 there is no place for the tripod mount if I'm not mistaken (if someone can confirm if I'm right.) 

When these above requirements realize I believe that will drastically change the shape of tn42. 

Not that easy to pack all the requirements and that looks to be as tn42 or another flashlight 

 

 

If the overall appearance of a certain size flashlights looks great that does not mean that if you reduce or enlarge the design that he look great as well as the original size. Imagine that C8 increase the reflector at 70mm silly silly silly. 

 

If we decide to design too similar tn42 we will have a problem with finding a company willing to produce clones. 

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Good points 5AR.

BTW, is it possible to get a cross section shot of your GT render? (it cut in half?).

A blend between the 2 deigns could be just what we need. Personally I LOVE the 5AR design, with a few minor revisions, like the changes miller posted above.

Possibly the area by the switch/tripod mount could be reduced a little to make pressing the button a bit easier while gripping the light and a few fins added at the base of the head to improve cooling. Then make the rest of the head smooth (remove the anti-roll cutouts and fins since that is apparently what people want).

I personally MUCH prefer the overall shape of the GT vs the TN42.

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