Posts by Linghunt

Welcome to Speardiver. Drop me a line or stop by at some point. In Santa Rosa.

I don't get wet as often as I like, tend to be making Sharpe Objects vs. using them.

-John

Nice installation video. I might have to get one of those kits at some point.

This is interesting dialog.

I finally got a hold of a Mechanical Engineer that happens to own a company that makes MONO. Got some interesting information so far. I will try to learn more, but for now, If you had a prefect crimper and crimp, and had it dialed in to be perfect. I think variability of mono would change things up some. Looks like water absorption of Nylon is a factor during the manufacturing process.

As stated earlier, the "feel of the crimping" and then testing it, seems to be the best method.

Following the basics of crimping, not on the ends etc. its important.

Quote from Mighty kc

Mangrove snapper, I aim between the eyes, and hit them behind the gills. Red snapper, If I aim between the eyes, I hit them between the eyes. I guess red snapper are not as smart. I shoot some noisy guns, my dive buddies tell me so often. Pneumatics, Aluminum Euro guns, and now a Co2 powered gun. (I don't like wood). I don't have issues with fish leaving before the spear gets there.

KC

This thread was more for general education. But you gave me an idea.

Wonder if we can gather info , on which type fish are more jumpy than others. Not sure how to measure metrics of each type and then Data is diver opinions. Maybe someone has some thoughts on this.

Follow up: I talked to

Chris Anderson
1-800-279-4570 Ext. 20
chris@legacywoodworking.com

That unit is in the $3K ball park.

I got a couple base line quote for some machines with CNC capability around $9K and $22K. If you have questions, give him a call, It was an interesting conversation. Looks like a good company to deal with.

-John

Nate,

Great Read(s). You make me feel I was 30 years younger. We looked about the same when I was younger back in 80's, but you got more greenheads.

Not duck hunted much last couple years, I just tend to hear the stories, and get a few birds to clean now and again. The boys wanting shell limiters never seems to stop. I spent the day making shot gun plugs, vs spear tips and pole like I'm suppose to.

I look forward to your next post. Thanks .;)

The Cyrano's out of the box (new) didn't come with a spring. I got rid of the spring on my own Mares guns. The old slider I made that I sliver brazed were much longer than these, I milled them out of Stainless from what I had kicking around..

I added the spring to push the slider up the shaft a tad for better contour of the line coming around the muzzle. It does add a little bit line tension on the line on the front vs just the rear shock absorber that does most of the work.

If I would have made the slider out of 1 -1/4" stock, then it could have been one piece vs 3. It would be better design.

How these guys are using these guns:

On Scuba most of the time :
They shot a fish and just pull the spear thru the fish and leave fish on the line :
Shoot next fish :
When it gets too much, they string all the fish, unclip the line and pull it thru.

Realize their shoots are typically 5 - 8 foot or into a hole. Their focus for setup is for ease of use, and speed to get next shot off.

My Dialog on mono is more just a curiosity now, for my technical understanding. The mix of Nylon and unknown material properties of low stretch mono vs regular mono is interesting.

Dan is the only mono seller that advertises low stretch feature. Dan is also the only one that shows a strength test as well. BTW, Dan, your video impressed Joe, my Mech. engineer.

Got a manufacturer now, I will try to get past sales staff to technical person and see what they say.

Quote from Dan

A come-along, now there's a word I think I haven't heard in 25 years. Nearly had my chest crushed by one that let go and flew past me. Summer job loading railway cars for a shipping company..

Yep, they are dangerous. I wear a welding jacket , big leather glove and get behind the sheet of plywood for a block. The kid stands way back and reads scale for me (and calls me crazy). I never did break my final cable swags, My pink rope let go just over 300 lbs for that test day.

How to determine which mono is the lowest stretch material out there is the question.

Vague descriptions and no material specs. I did find some info on fluorocarbon lines for fishing and comparisons to Mono. One guy was talking about Mono actually having some small air bubbles in the line where fluorocarbon does have that.

The FC is more dense and heavier than Mono and refracts light less. (a pole fishing concern).

I couldn't find any FC line rated to 400 lbs.

Must be so IP (intellectual property) going in all of this, not getting much feedback at all.

I'm going to run a test and see if I can over crimp the fitting. I will chuck up two pieces of Stainless and drill a hole in the joint Do a crimp with the press, then open up the hole and repeat.

I suspect the first one will just push the mono out of the crimp area.

Hopefully I can find a sweet spot where I don't have to rough up the ID hole of crimp for a bite into mono.

I think I will break out the 400 lb fish scale to measure results. Below is my crude test fixture when I was testing swaging dies for stainless steel spheres on SS cable. Used truck bumper and a big Oak and come-along. I had big piece of plywood for a shield when it went. Wish I had a better test set up, but it works in "hillbilly mode".

Look interesting. I could see a 1/2 dozen items to change out and upgrade.

4 threads per inch on lead screws sounds too big, but I guess it's all about how tight of a part you are making.

I couldn't find this unit on their web page. They had lots of CNC equipment. I couldn't find specs you would find on a typical Metal CNC. (e.g. Repeatability and resolution of slide travels, to name a few)

Without good repeatability numbers, you could be fighting it big time to make a good part.

Just for reference: but my CNC has resolution of slide travel at (.00005") & Repeatability of slides to (.0001") . One of the main reasons I picked this model. If the machine isn't working right, you know it's the operator and not the machine real fast. An apples/oranges comparison, but just food for thought.

I might have to give them a call next week, got me curious now on cost.

OLD SLIDER from 1990's been in service for long time. Might have been one of the 1st parts I made. My brazing doesn't look so good, I didn't even get the joint wicked properly.

I grinded off the end where I had the mono melted, and still couldn't break it.

And Yes, I do understand the loop and thimble is a stronger connection.

Quote from Dan

That's what I thought. Like I said I wouldn't expect it to hold anything like that. The crimped loop gives it a lot of holding power. In a pinch if you don't have a crimper, you can just make a loop using the crimp and burn the end of the mono, it will hold some fish.

I didn't want the crimp hanging out in the wind/water getting trashed. Most of the fish get removed from un-clipping the line so that joints gets pulled thru the fish.

Let me take a pic of the old one I have, The slider was made back in the 90's and was silver brazed. The concept works, not to 400 lb rating, but well over 200 lbs.

Side note: Dan what is your Mono made from? Nylon?

Check out this information I found on Water Absorption and the effect on tensile strength.

Thought this was really interesting.

Effects of Moisture Absorption on Nylon 6 through Nylon12 vs Power-Core

The small hole on the slider has a thru hole at .096" and a counter-bore of .147" to house the crimp inside the hole. The crimp fits up against that lip inside. Make sense? I had typo on bold number

This fits in with this dialog, so will add it here vs a new thread. I will try to be concise.

Two buddies bought new Cyrano 700's for use on Northern CA coastline.

They wanted the typical set-up I have on all my small air guns. Got them hardened shafts and made them the rear tapered connector, replaced the muzzle washer with a new washer that has a better aspect ratio with a counter-bored for spring, and the slider. Made them my custom clip that is larger with only one spiral. (Larger clip easier to handle in our frozen waters).

All I had left was to do the single crimp to fit into the slider ring. Go figure I couldn't find the one's I used in the past. Decided to just order some more, but couldn't find any. I have no idea where I got them before or if I just made them.

---------- Ok , now to crimping saga ------- I made some sleeves out various materials ( various Aluminum types, 360 and 260 brass, bronze) and I just wasn't getting a good crimp. After many attempt and failures below 100 lbs I was..... :crazy:....

At the end of the game I cheated and ran an undersized tap in the front side of the crimp to give me a little grip onto the mono. I tried to show that in picture. That seemed to do the trick, but not ideal solution. Thusly my posting here to see what I was doing wrong.

The Stretch of the mono during test phase. (I'm using .080 Green Shakespeare line that is used for Trim lines) I've had it a long time and It's worked great till now.

I decided on Aluminum for final testing today from various web info I found.

The surface area of the crimp is greatly reduced doing it this way ( .40" long) vs. typical double holed crimp with thimble. I got one of those in picture on a swivel. That was fine. This was part of my problem.

I'd done this many times in past years but losing my stash of crimps got in in a pickle. I tested an old crimp like this and it was super strong, I couldn't break it. (copper crimp)

I started to make a pressing die and swage it with 20 ton, but read somewhere not to over crimp.

Only thing I wanted to test was using copper for sleeve, I didn't have any material to mess with.

I'm thinking now that the stretch of the mono was a big part of it, like what Dan said earlier in this Thread. The grip on mono with the touch of grooving from tap got it solid with a 200+ lb load.

I'm thinking I might buy a 6 sided ferrule crimper vs a 2 jaw crimp. More to say, but a good start.

Ready for some quality feedback.

Sounds good, I've not had time to look into it, but there might be fancy electronics in there to help manage the power. On LED's as the voltage drops off you still get good output.

I'm guessing here, but if batteries put out 4.5V in series and (dependant of how they wire the LEDs) assume they are all in parallel then they must be using a voltage regulator to give them .7V , or maybe a combo of 2 in series and then parallel so 1.5V, etc. The micro chips are so small these days and cheap who knows what they did.

Dan, How many LEDS are in the light?

Here is a Picture of a lighted road side cone donut, With all the banks of LEDS we had lots of options. We put a computer chip in there to manage the patterns etc.

That was Prototype BTW we thru together for testing and customer approval of concepts.

It's great to dream, kind of like flying 500 years ago. Technically we just are not there yet. The article to rebut it was pretty good.

It will play well with the boys out there selling "Free Energy from Air crowd".

Some day maybe when we get a whole lot smarter and have more technical break through.

An implant in the body that controls the O2 going into the blood and the exhaust of C02 might be closer to reality, where the Lungs are not used. Goes towards that Movie where they breathed Liquid O2, but ignored the temperature of it. Out of the box thinking thou.

Been reading on Supercavitation - Wikipedia, the free encyclopedia lately. Lots of interesting ways to do things.

SPP-1 underwater pistol - Wikipedia, the free encyclopedia

The SPP-1 Underwater Pistol was made in the USSR for use underwater by Soviet frogmen as an underwater firearm.[2] It was developed in the late 1960s and accepted for use in 1971. Underwater, ordinary-shaped bullets are inaccurate and very short-range. As a result, this pistol fires a round-based 4.5 millimetres (0.18 in) caliber steel dart about 115 millimetres (4.5 in) long, weighing 12.8 grams (0.45 oz), which has longer range and more penetrating power than speargun spears. The complete cartridge is 145 millimetres (5.7 in) long and weighs 17.5 grams (0.62 oz).

----------------------
Got this in Email, thought it was interesting.

I think I might buy one for my Son, He likes bright lights for his air soft rifles. Should look nice mounted on an AR-15.

Reefchief, How is the brightness towards the end of Battery life?

I'll have to make a mount not to cover up the speardiver logo. Maybe Dan will be selling to the Air soft type.

Dan, I saw the 8 hour burn time on Spec. Not looking for exact numbers, , but in the last hour of battery life, How bright is it? Just looking for general % number, say like 50% - or 80% etc.

I think I will mount one of these on my Mares pneumatic gun. The 1.25 OD is really nice.

Is the electrical switch a reed relay with a magnet in lever?

-John