The LOUDENER V2 r/flashlight (>5000m range)

https://www.reddit.com/r/flashlight/comments/1xdja3i/5_km_637mcd_loudener_v2_3x21a/

https://budgetlightforum.com/t/the-loudener-4-66-km-ansi-230mm-fresnel-mod-for-convoy-c8-m21a/235568/33

Reddit/BLF link to project above.

Welcome to the LOUDENER V2 an even more rediculously pocketable thrower flashlight project!

I printed mine large mouth up, for quality purposes. Added a very large brim and slowed down speeds, both for stability.  

Specs (approx):

1.  F150R - 3V25A Buck driver

2.  6.37 million candela (~5,050 meters of FL1 ANSI throw)

3.  Non-destructive Convoy 3X21A modification 

BOM:

1. Convoy 3X21A (preferably with a round emitter)

2. Printed cone and press-fit retaining ring (preferably PETG)

3. Fresnel lens Diameter = 230mm, Focal length = 190mm

4. 3 to 6 Rubber O-rings (I used 56mm OD, 3.55mm thickness)

5. Matte black paint 

Instructions

• Print the cone and retaining ring

• Paint the inside of the cone matte black (PETG is inherently shiny)

• Mount D= 230mm F= 190mm fresnel lens inside cone and press fit retaining ring (check tolerance, might need glue or scaling)

• Carefully remove the bezel, reflector and gasket of the 3X21A

• Mount 3, or preferably 6 O-rings inside the "heatsink" notches of the 3X21A head

• Slide cone over the O-rings.

• Adjust beam convergence by sliding the cone up/down (shouldn't take much, best done outside)

Info:

• The lens can be found on alie.xpress. Make sure it's the right size and focal length.

• The O-rings do not need to be the exact size, just make sure it's a tight but adjustable fit.

• You can use whatever emitter and driver you want, but square emitters will give a square beam.

• When removing the bezel, use some painters tape on top of the hole of the reflector to prevent dust ingress while storing it.

WARNING: this is not a toy, be responsible!