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Love it! I can't wait to see it in person. Amazing, for a day's work, by the way.

Here are a few progress pictures.

When done it will be a 67" enclosed track carbon gun that gets it's basic shape from the hybrid form. The rear, thick portion of the gun is 2-3/4" wide, 2" high and 42" long (much longer than most hybrids). It has a tear drop shape which should move through the water well. The round barrel at the front is 1-3/8" with a carbon wall thickness of 1/8". The track is cut for either a 5/16" or an 11/32" shaft. It should handle 5 bands nicely and with the Kitto M6 Mech the trigger pull will be butter.

The handle will be changed out for a custom molded one.

This gun is an attempt making a big, powerful gun that handles like a small gun.

It's another wrap of carbon over a 1-1/4" tube.

Quote from griswold

Can't wait to see how the carbon came out in the morning.

Me neither!

How did you arrive at the 1-3/8" tube? Is that additional carbon over a 1-1/4" tube, or carbon over a wood dowel, or carbon over the other stuff?

Made most of my new enclosed track 67" carbon gun today. It is 2.7" wide and 2" high at the back with a tear drop shape. The wide rear section is 42" long (much longer than most hybrids) it then transitions pretty quickly to a 1-3/8" tube section.

If all goes well this gun will replace the tuna hybrid that I made a few years ago and gave away. Can't wait to see how the carbon came out in the morning.

Finished
Shaping the stock
Cutting the track for the barrel
Cutting the track for the shaft
Cutting the trigger mech pocket
Cutting the push rod slot
Installing the barrel in the stock
Wrapping the whole thing with carbon fiber

Still need to:
Cut a shaft fin slot in the carbon fiber
Make a muzzle
Install trigger mech and push rod
Make a handle
Make a trigger
Install line release
Apply finish

Awesome work! It's got to make you feel better knowing that big flag is up there.

Very nicely said.

I just wanted to see how many people would get the reference! <img src= " height="23" srcset="https://spearfishing.world/forum/images/smilies/emojione/1f606@2x.png 2x">

We can sure give that bit a try. I just looked in my collection - I already have it in 1-1/8".

I might play around with a couple "out there" designs in all carbon. Not in any rush, and I only have a vague idea of what I want to make at this time.

Regarding a big hybrid.

I made one once before that I used to shoot a tuna in Mexico. It was powered by 6 9/16" bands at the time. While it definately kicked, the shaft went to the point of aim. What I didn't like about that design is that it was too wide and flat at the back, causing the bands to really pile up.

Jeff's design above with the tapered sides as well as the hard wishbones makes for a clean line of sight.

Quote from griswold

As we discussed today, I'm thinking about making a BIG hybrid. Something in the 65-68" range that will handle tuna type power, but move like butter through the water. Maybe a new carbon design that starts fatter at the back and transitions quickly to a thin front section would be fun.

"We have the technology. We can rebuild him. We can make him better . . . faster . . . stronger . . ."

Cue Steve Austin's theme music <img src= " height="23" srcset="https://spearfishing.world/forum/images/smilies/emojione/1f606@2x.png 2x">

I opted not to include a full length enclosed track on the 1-3/8" diameter tube because I felt that was pushing it a little, but if you are thinking of a larger diameter, then we could easily do something similar to the enclosed track on Gary's Gun. Are you thinking all carbon, or a wood/carbon hybrid?

I would like to use the raised Delrin enclosed track on the wood section of mine, but still haven't quite figured out how to do the part that is above the tube, because the regular dovetail won't work. Unless I cut it into the tube, which I would rather avoid.

Would this be a better way to make our dowel core? They are available in lots of sizes, including the 1-1/8" diameter that I need.

Jeff, I don't see how enclosing the back of the track can be a negative in any way. I'd say do it. The design looks both solid and sleek.

As we discussed today, I'm thinking about making a BIG hybrid. Something in the 65-68" range that will handle tuna type power, but move like butter through the water. Maybe a new carbon design that starts fatter at the back and transitions quickly to a thin front section would be fun.

You've got some real talent there, Pucho!

I know what happens when you design by committee (the camel), but curious if anyone has an opinion on the necessity of the enclosed track in the rear, vs. an open track tube all the way back?

I know that most people don't like the solid wishbones, so that's something that I have to evaluate based on my own tastes.

Quote from pargo

Jeff, if there's one person I know that should have a slow motion camera rig it's you Maybe you and Chad. Solve those life mysteries for us!

Sure would be a fun toy to play with!

Quote from Toledo970

So no full enclosed track from muzzle to trigger?

I thought about it. But it really adds a lot of complexity to things, and I'm just not sure of the benefit when my intended configuration is no more than three bands, and no smaller than a 5/16" shaft. I like having the enclosed muzzle when it comes to wrapping the shooting line, but I'm not even sure how much the rear enclosed section adds as far as accuracy or shaft whip. The main reason that I am considering a raised enclosed track in the rear is that the flat top makes it possible to use the solid wire wishbones without tearing up the wood, and keeps everything neatly arranged for a really clear sight picture. Similar to this earlier model:

More wood equals greater mass. Obviously my friend to help to manage recoil. But secondly, the extra buoynacy forward of the handle allows me to position ballast in the extreme rear and counteract the natural nose heaviness of the hybrid design.

Edit - Weight without shaft will be about 7.25 lbs, ballasted to float convincingly without the shaft. Could be 7.5 lbs and just barely float.

Top version has an enclosed track in the wood section. Bottom version runs the open track tube all the way to the trigger mech.

Let's see how a scanned AutoCad file works as a picture file.

Thank You Pucho! That's what I've been needing. My intent was to build something just a little larger for my mid water gun, so that it could handle three 5/8" bands without knocking my teeth out.

What I have designed is 58" long
The wood is 2.25" tall by 2.25" wide by 27" long
The tube is 1.375" diameter by 27" long
Muzzle adds 3", and the shaped rubber butt pad adds 1"
Handle is 1.4" below centerline of the shaft
Total weight to be approximately 8 lbs

I'm starting to flesh out some of the details, and understanding why nobody uses a 1-3/8" barrel, at least as far as I know. Ball end router bits are easy to find in 1-1/4" diameter, and 1-1/2" diameter, but no 1-3/8". So if I am hell bent on using 1-3/8", then I have to drill from the end, and cannot run the tube all the way through the stock like the pictures that Pucho posted.