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Search: Posts Made By: popgun pete
Forum: All About Guns 09-16-2021, 09:06 AM
Replies: 4
Views: 593
Posted By popgun pete
Re: attaching line to the rest tab?

It reduces the size of the line loop on line or pin wrap muzzles as the spear leaves the gun and the chance of it catching and pulling the shot off course slightly. Not necessarily a problem and...
Forum: All About Guns 09-13-2021, 07:04 PM
Replies: 6
Views: 605
Posted By popgun pete
Re: GIRS-TITAN Hydropneumatic Speargun

This diagram shows how water injected during muzzle loading squeezes past the rubber cuff on the releasing valve by pushing it back on its biasing spring while the releasing valve body remains locked...
Forum: All About Guns 09-13-2021, 04:44 PM
Replies: 6
Views: 605
Posted By popgun pete
Re: GIRS-TITAN Hydropneumatic Speargun

The grip handle and releasing valve before fitting it in the handle.
https://forums.deeperblue.com/attachments/grip-and-releasing-valve-jpg.57467/
Close-up of the releasing valve....
Forum: All About Guns 09-13-2021, 04:38 PM
Replies: 6
Views: 605
Posted By popgun pete
Re: GIRS-TITAN Hydropneumatic Speargun

This is how the gun shoots as compressed air drives the annular piston rearwards as a result of the releasing valve uncorking the rear of the inner barrel thus allowing water under pressure to escape...
Forum: All About Guns 09-13-2021, 03:24 AM
Replies: 6
Views: 605
Posted By popgun pete
Re: GIRS-TITAN Hydropneumatic Speargun

Some diagrams from the gun's handbook.
https://forums.deeperblue.com/attachments/gun-assembly-variations-jpg.55602/...
Forum: All About Guns 09-13-2021, 03:18 AM
Replies: 6
Views: 605
Posted By popgun pete
Re: GIRS-TITAN Hydropneumatic Speargun

An interesting aspect of this GIRS-TITAN gun is how you pump the gun to create the pressurised air in the tank. Like all the annular piston hydropneumatic guns the compressed air tank is in the nose...
Forum: All About Guns 09-13-2021, 03:16 AM
Replies: 6
Views: 605
Posted By popgun pete
Re: GIRS-TITAN Hydropneumatic Speargun

This is the gun in its latest incarnation.
https://forums.deeperblue.com/attachments/girstitan-gun-medium-1r-jpg.57415/
https://forums.deeperblue.com/attachments/girstitan-gun-medium-2r-jpg.57416/...
Forum: All About Guns 09-13-2021, 03:11 AM
Replies: 6
Views: 605
Posted By popgun pete
GIRS-TITAN Hydropneumatic Speargun

Here is another hydropneumatic speargun from Russia, but this one is made from titanium. Like the “Aquatech” models available some years ago this gun uses a releasing valve to shoot the spear out of...
Forum: California Spearfishing 09-11-2021, 11:37 PM
Replies: 4
Views: 636
Posted By popgun pete
Re: Sharpening Speartips

Buy a bench grinder and some protective gear and practise on sharpening some rods to provide a point. At first your flats will not meet in a centralised point, but with experience you will get the...
Forum: California Spearfishing 09-06-2021, 06:01 PM
Replies: 4
Views: 1,176
Posted By popgun pete
Re: New Developments in Conception Fire

Grandfathering provisions should be scrapped which allow non-compliant vessels to operate.
Forum: California Spearfishing 09-05-2021, 02:03 AM
Replies: 4
Views: 1,176
Posted By popgun pete
Re: New Developments in Conception Fire

Lawyers seeking to sue for hefty damages often look for the entity with the deepest pockets. Truth Aquatics is financially underwater and its fleet sold, so not much money to be had there.
Forum: All About Guns 07-07-2021, 02:00 AM
Replies: 170
Views: 76,235
Posted By popgun pete
Re: Double Roller Trigger for Pathos handle, Ermes Sub

Well I have not knocked the pins out and I am not going to bother, the mech was only purchased to check it out, but it cost 80 bucks shipped so should have been better.
Forum: All About Pole Spears & Slings 07-05-2021, 06:56 PM
Replies: 0
Views: 7,233
Posted By popgun pete
Riffe Aluminator Pole Spear

Something that just appeared in my Inbox.

https://speargun.com/collections/carbon-fiber-pole-spear/products/new-aluminator-pole-spear
...
Forum: All About Guns 07-04-2021, 05:37 PM
Replies: 170
Views: 76,235
Posted By popgun pete
Re: Double Roller Trigger for Pathos handle, Ermes Sub

Even loaded up the sear lever does not align longitudinally and rocking it laterally does not straighten it up either, so I doubt a tapered bore is responsible for the misalignment created by the...
Forum: All About Guns 07-03-2021, 07:45 PM
Replies: 170
Views: 76,235
Posted By popgun pete
Forum: All About Guns 07-03-2021, 07:12 PM
Replies: 170
Views: 76,235
Posted By popgun pete
Re: Double Roller Trigger for Pathos handle, Ermes Sub

EDM wire cutting uses an electrical discharge to burn out shapes with a moving wire working something like a bandsaw conceptually, but the problem with this trigger mechanism are the holes in the...
Forum: All About Guns 07-01-2021, 09:32 PM
Replies: 191
Views: 182,493
Posted By popgun pete
Re: Trigger Mechanism Design Rules

As shown in this photo with the sear lever swung out which can be used to illustrate the point made above if you think of it as the mechanism being cocked with the lever sitting in the horizontal...
Forum: All About Guns 07-01-2021, 09:10 PM
Replies: 170
Views: 76,235
Posted By popgun pete
Re: Double Roller Trigger for Pathos handle, Ermes Sub

I retrieved my Ermes-Sub double roller trigger mechanism from the spares box and did some measurements with Vernier callipers. The trigger piece is 5.90 mm wide, the sear lever is 7.86 mm wide and...
Forum: All About Guns 06-27-2021, 09:18 PM
Replies: 191
Views: 182,493
Posted By popgun pete
Re: Trigger Mechanism Design Rules

The diagram disappeared because the thread it referenced is no longer linked, so here it is direct.
Forum: All About Guns 06-19-2021, 05:11 PM
Replies: 97
Views: 20,381
Posted By popgun pete
Re: SEA HORNET Clone from CHINA!!

Well I was surprised that they never addressed the issues and then had another go at selling them, but as Kevin had already told them exactly what to do years before and they never acted on it back...
Forum: All About Guns 06-18-2021, 11:17 PM
Replies: 97
Views: 20,381
Posted By popgun pete
Re: SEA HORNET Clone from CHINA!!

Postscript: These Chinese "Sea Hornet" clones seem to have totally disappeared, in fact they wound down pretty quickly after I communicated with the eBay seller and I have not seen them since.
Forum: Freshwater Shooting 06-16-2021, 05:20 PM
Replies: 4
Views: 6,032
Posted By popgun pete
Re: Fresh water gun?

The fish types that you are after, underwater visibility and shooting range will help determine what you need. In limited visibility you may need a quick turning gun and now there are rear biased...
Forum: General Spearfishing & Diving Discussion 06-08-2021, 09:45 PM
Replies: 3
Views: 4,892
Posted By popgun pete
Re: How to clean hazy perscription lenses?

Are these lenses bonded onto a front plate? My Dad had a mask with flat ground front lenses bonded onto a tempered glass plate. If the glue between the two glasses deteriorates then this gives that...
Forum: All About Guns 06-05-2021, 05:29 PM
Replies: 3
Views: 3,528
Posted By popgun pete
Re: Seawolf "Velair": Another pneumo-powered Arbalete

Target shooting in swimming pool with Velair 65. A 4 metre shooting distance, 7 mm shaft.
On the Seawolfsub Facebook page /seawolfsub/videos/477098620063791...
Forum: All About Guns 06-04-2021, 05:47 PM
Replies: 65
Views: 26,692
Posted By popgun pete
Re: My Invert Roller

Compound bows just reduce the pull at maximum draw so that the archer can easily hold the arrow against the pull of the bow. The cams/pulleys are torque devices that vary the effort depending on how...
Showing results 1 to 25 of 500

 
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