Fireflies E07 preview

aginthelaw · April 24, 2019, 4:21pm

BlueSwordM:

That’s not the problem.

Trying to push 30A through springs is a very, very difficult task.

Honestly, I have to say Nitecore was both lazy, greedy, and impatient in this regard.

Why? While they are right in regards that the springs would oxidize, they didn’t tell why…

Well, at 30A, any normal spring would melt pretty much instantly.

Here’s the thought process Nitecore probably had:

1. Let’s use gold plated steel springs. Oh no, they failed at 6A.
2. Let’s use gold plated dual steel springs. Oh no, they failed at 9A.
2. Let’s use dual phosphor bronze springs. Oh no again, they failed at 18A of continuous use.
4. Well, nothing on the market actually exists that can handle the load of a 100-120W light running off of a single cell.
Let’s put a 10A cell in a 30A flashlight and weld nickel plated copper strips instead.

If the engineers, or rather, Nitecore, actually put in effort into designing adequate contacts, they should’ve just looked at BLF and see what members cooked up in spring design.

They could’ve used dual gold plated BeCu C17500 springs, and they would’ve worked quite well if they had waited for a 25-30A cell.

um, yeah. that’s what i said…the good thing is now i know why i said it. i can’t believe the wealth of info you guys have trapped in your minds…

BlueSwordM · April 24, 2019, 4:22pm

Well, you’re right.

The gold plating doesn’t oxidize. It’s just that the springs fails first

Lexel · April 24, 2019, 11:43pm

BlueSwordM:

That’s not the problem.

Trying to push 30A through springs is a very, very difficult task.

Honestly, I have to say Nitecore was both lazy, greedy, and impatient in this regard.

Why? While they are right in regards that the springs would oxidize, they didn’t tell why…

Well, at 30A, any normal spring would melt pretty much instantly.

Here’s the thought process Nitecore probably had:

1. Let’s use gold plated steel springs. Oh no, they failed at 6A.
2. Let’s use gold plated dual steel springs. Oh no, they failed at 9A.
2. Let’s use dual phosphor bronze springs. Oh no again, they failed at 18A of continuous use.
4. Well, nothing on the market actually exists that can handle the load of a 100-120W light running off of a single cell.
Let’s put a 10A cell in a 30A flashlight and weld nickel plated copper strips instead.

If the engineers, or rather, Nitecore, actually put in effort into designing adequate contacts, they should’ve just looked at BLF and see what members cooked up in spring design.

They could’ve used dual gold plated BeCu C17500 springs, and they would’ve worked quite well if they had waited for a 25-30A cell.

Why do people always think conventional?
You just need not the spring to conduct the current!
just use the spring to push the contact against the battery, you could use the same sort of contact like for spotwelding just with a bit raised button

Lumintop did it here

aginthelaw · April 25, 2019, 5:33am

But wasn’t there a bunch of lights that failed in that run? Wasn’t it the Odl20c?

Agro · April 25, 2019, 5:43am

Or use a springless contact. Like DQG.
In a constant-length light that doesn’t need daily cell swaps (like that Nitecore) one could use a contact screw.

BTW I haven’t seen that Lumintop contact. Looks like a professionally done spring bypass.

ichoderso · April 25, 2019, 8:08am

some pictures of my copper E07 in the german forum:

https://www.taschenlampen-forum.de/threads/fireflies-e07-copper-titanium.69805/

Tally-ho · April 25, 2019, 9:17am

It’s nice to have the thread back on track with your CuTi E07 pictures but without a TLF account we can only see thumbnails.

ichoderso · April 25, 2019, 11:15am

ok, I will load the pictures in a cloud and will publish it direct in this forum……Sorry

BlueSwordM · April 25, 2019, 12:15pm

@Lexel, I do know about leaf spring contacts.

I’m just saying Nitecore should’ve used a better solution than making an unreplaceable cell pack.

ichoderso · April 25, 2019, 12:33pm

ichoderso · April 25, 2019, 12:36pm

Tom_E · April 25, 2019, 12:48pm

I have zero interest in this Cu/Ti E07 after being totally disappointed in the D4 Cu/Ti. The D4 gets blaz'n hot in a couple seconds - pretty useless unless you got thermal protective gloves to operate the thing with. Sure, copper is great for thermal transfer, but there's gotta be a better way to use it, like wrapped in aluminum maybe, I dunno....

Agro · April 25, 2019, 12:58pm

CRX has wrapped his triple in titanium. Which didn’t work well. Then he replaced that with carbon fibre and is happy with the result.

Nite_Shadow · April 25, 2019, 8:54pm

ichoderso,

They are beautiful and great pics! Thank for going through the effort of posting them here!

Cheers!

contactcr · April 25, 2019, 9:08pm

@FireFlies, anything else in the pipeline you want to share? A refreshed E07? A new light?

Tally-ho · April 25, 2019, 9:25pm

Yes, thank you for taking the time

Tom_E · April 25, 2019, 9:40pm

Yes, luv the pics - great job!! (should have said so before... )

I do luv the look of copper, but an E07 with all that power is wut scares me - least alum the rest of the light maybe?

caplang · May 3, 2019, 3:59pm

It seems E07 Cu edition product page is up on their web
http://www.ff-light.com/index.php?route=product/product&product_id=57

twisted_raven · May 3, 2019, 5:28pm

Great deal at $0.00. May have to get one.

Firelight2 · May 3, 2019, 6:40pm

Yeah I was looking at that too. The price is right!!!

But somehow I don’t think Fireflies actually means to give these away for free. :disappointed: