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Invert Roller speargun Z-1 DRAGON

zulus

Member
Aug 4, 2021
11
3
8
36
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musubi

Active Member
Feb 9, 2017
66
31
33
38
@zulus Nice gun!
Some questions:
Are those pulleys custom made or is there a brand name to them?
What size bands and shaft diameter are you using?
Is that a custom made muzzle?

One idea is to do away with that black helper and just pull from the wishbone. Or cut down on the helper diameter. Inverts are usually fairly easy to load the first pair of bands. This way you maximize the force and work put into the shaft and reduce the drag on the shot.
 

spar

Well-Known Member
Aug 9, 2012
58
9
48
@zulus Nice gun!
Some questions:
Are those pulleys custom made or is there a brand name to them?
What size bands and shaft diameter are you using?
Is that a custom made muzzle?

One idea is to do away with that black helper and just pull from the wishbone. Or cut down on the helper diameter. Inverts are usually fairly easy to load the first pair of bands. This way you maximize the force and work put into the shaft and reduce the drag on the shot.
custom speargun.shaft 8mm ruber 35cm
 

zulus

Member
Aug 4, 2021
11
3
8
36
@zulus Nice gun!
Some questions:
Are those pulleys custom made or is there a brand name to them?
What size bands and shaft diameter are you using?
Is that a custom made muzzle?

One idea is to do away with that black helper and just pull from the wishbone. Or cut down on the helper diameter. Inverts are usually fairly easy to load the first pair of bands. This way you maximize the force and work put into the shaft and reduce the drag on the shot.
I made the pulleys myself, just like the shotgun from carbon fiber.140см.8мм Salvimar. И Beuchat Tahitiana Gt Super Steel Spear for Marlin Carbone Revo Concept 7 mm 140 cm
 

zulus

Member
Aug 4, 2021
11
3
8
36
@zulus Nice gun!
Some questions:


One idea is to do away with that black helper and just pull from the wishbone. Or cut down on the helper diameter. Inverts are usually fairly easy to load the first pair of bands. This way you maximize the force and work put into the shaft and reduce the drag on the shot.
very comfortable black helpe. does not cut fingers. 3mm diameter
 
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