Posts by Don Paul

Welcome mate, good to have ya.

Cheers, Don

Wood guy, on my guns I take specimen length X 3 .

Round numbers as a example.
Initial length, L0=100mm.
Final length, Lf = 400mm.

Change in length, dL = Lf-L0 = 300 mm

So, percentage elongation = 300*100/100/100 = 300%.
300% means the elongation is 3 times the original length, which is 3*100 mm.

Cheers, Don

Dusty, good quality rubber such as Dan's can handle 300% elongation, I have not taken it past that as loading becomes a issue for me. I start by first cutting my bands to 250% than I elongate them for 2hr of soakdown.
Before I hunt with the gun I retie the bands at 300% elongation to achieve consistent max power delivery.

I don't know about Dan, but I know of one big manufacture that had rubber that could not be cocked to 300% elongation by most of his customers that weren't Aussie or South African, than the guns went out with 250% percent elongation. Later the rubber was reformulated to have more elasticity and produce less power. Guys hate when they buy a high end gun and can't cock it in front of their mates. A lot of rubber is produced today with this in mind, such as 19mm bands with soft compounds and large ID holes. Euro gun builders tune the band composition and size to produce a powerful but smooth shooting gun.
Us Yanks sometimes keep trying to hang the thickest and shortest bands on every thing we shoot.
My guns have mass designed in to allow me to run at full throttle, that my shooting style and aim has grow accustom to. The Aussies on the West coast have learned in the past 30 years that one thick 19mm band on a long springy 6.75 or 7mil shaft can get the job done too. Two different hunting styles with gear to match,
both kill fish in the right hands.

Cheers, Don

I can tell you I can't cock bands making 140lb at the wing, but some South Africans can.
Put a scale on that 300% band and tell us what you get with the small id 3/4.
When I have used 3/4 on a 48'' barrel I could only do 250% elongation.

Cheers, Don

Welcome Sean, good to have you, thank you for your service.

Cheers, Don

Quote from tufual

Don , you really like 5/16 <img src= " height="23" srcset="https://spearfishing.world/forum/images/smilies/emojione/1f606@2x.png 2x"> , nice work man

Yes. for shafts and small boat hardware.

Cheers, Don

Last one, the wrinkles on the starboard are because I dropped the hull pressure to 1PSI. things will tighten up when I raise it to 4.5 PSI after the glue has cured.

Cheers, Don

I could not find just the right cleat for my Port transom, so reworked a chunk of 356 Al I had and secured it with 5/16 hardware.
My next shipment of fresh Weaver two part glue came in so I finished reinforcing the bow roller area with ribbed nylon/rubber at the nose. Filled in the two gaps with black 5200 that will be sanded to blend in the seams after the 7 day final cure. The bow roller is set straight but the camera is angled.

Cheers, Don

Quote from sdeisen

at least ya got wet

Hey...I got nailed by the sprinkler this morning.;)

Cheers, Don

Quote from Captainleo

Diving. I'm not a pussy. Haha. We trunked it with no weight belts. I used my bodyboard fins. My watch said it was 57, but it didn't feel that cold.

Spoken like a good Marine.

Cheers, Don

Congratulations Jim ,

Cheers, Don

Prego !

I'm getting hungry right now.

Cheers, Don

Quote from Hookinfish

But I am moving to a spot without as much space and no garden so I don't know if I will be able to even grow the basil seeds my great grandfather brought to the US from Italy through Staten island.

If you propagate a couple, I'll will be happy to plant them in my little Italian herb planter, and will share the harvest with you. I do have Zeus in my back yard.;)

Cheers, Don

Alex, if you keep making pets out of them you'll never eat them.;)

I see a trickle filter and protein skimmer in your future, closely followed by 10k metal halides sucking up massive amounts of electricity.

Cheers, Don

Welcome

Cheers, Don

Welcome Nathan, I think you'll fit in great here mate.

Cheers, Don

cksea, Your free here to piss in the grass and have fun.... It's a better place.:
But look out! ... da big dog may not let you back in da house.
Cheers, Don

Welcome buddy.

Cheers, Don

Welcome mate, good to have you.

Cheers, Don