GeckoSub Pulley Loader - Another Idea For Assisted Loading of Pneumatic Spearguns

[popgun pete]

The floating part of the loader could just be a ball on the end of the line as it would then act as a marker if the whole lot fell to the bottom. Polystyrene crushes and breaks, so one of the polyurethane balls would be best, big enough to support a length of line, but not too big. I don't eat sashimi, so any fish I get are going to be cooked. I know lemon or lime juice, etc. "cooks" the raw fish, but I am just not into that stuff.

Pelengas ball float http://batyskaf.by/pelengas/shar-poplavok-pelengas?page=3

 

[tromic]

40 bar with 13 mm piston would be 54 kgf. Nice force to load the Mirage. But with Easy loader that would be only about 2.5 kgf required to load the shaft into the speargun.
Length_of_the_arm (150 mm)/radius_of_the_winch (7 mm) = 21,4.
54 kgf/21.4 = 2.5 kgf.
I would use Dyneema of 2.5 to 3 mm thick.

 

[popgun pete]

Rate of winding needs to be considered, if you have plenty of time then a small winch size is acceptable using a 7 mm drum which is s stainless rod, but faster loading can use something larger provided the pull provided by the user is within acceptable limits.

 

[tromic]

No, drum size mast not be 7 mm!
My current Easy loader has it 12 mm OD (using 2 mm Spectra), but for loading Mirage on 40 bar it would be better to be 14 mm (for 2.5 mm Spectra) Bending diameter have to be at least 6 x thickness of the Dyneema/Spectra.

 

[popgun pete]

No, drum size mast not be 7 mm!
My current Easy loader has it 12 mm OD (using 2 mm Spectra), but for loading Mirage on 40 bar it would be better to be 14 mm (for 2.5 mm Spectra) Bending diameter have to be at least 6 x thickness of the Dyneema/Spectra.

That 12 mm diameter winding spool is a tube? (for low weight).

 

[tromic]

That 12 mm diameter winding spool is a tube? (for low weight).

No, it is a solid stainless steel bar, but might be a tube too...