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The DeeperBlue.net Gun Building Extravaganza - Gun Options 5 - Track Options

Thread Status: Hello , There was no answer in this thread for more than 60 days.
It can take a long time to get an up-to-date response or contact with relevant users.

What type of Track would you like?

  • Conventional flush track

    Votes: 6 20.7%

  • Recessed track

    Votes: 23 79.3%
  • Total voters
    29
  • Poll closed .

Stephan Whelan

Papa Smurf
Staff member
Admin
Jan 7, 1999
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The 5th poll on the DeeperBlue.net Gun Building Extravaganza.

Do we want a conventional flush track or do we want a recessed track.
 
First to vote! whoooohoooooo! What does that get me?

I voted recessed. I would hope it fights the vibration of the bands and help the barrel slip through the watter better on side to side movement.
 
Maybe this has been discussed but I think I missed it. IF so point me in the right direction and if not any thoughts?....

Will the recessed track cause a problem with the bands when fired?... by this I mean as the bands are released and proceed to pull the shaft forward will teh bunching of the bands inside the track cause any friction or other problems?

I really like the idea of the recessed track but before I vote I want to know if anyone has thought about this yet.
 
There is another thread where the shape is discussed, but it can be discussed here again. The recess would prolly be wide enough to allow the bands to come back to size. Then they would be exposed at the end, since tha barrel has a taper too. So from the side you would see 12 or so inches of the bands from the muzzle back. (the 12" is just me guessing).

More POV's can be found here: http://forums.deeperblue.net/spearo...building-extravaganza-pre-poll-gun-shape.html
 
Thanks Chris,

It seemed to slip my mind what we were building the gun with a tapered stock. I really do like the idea of the recessed track.
 
It has been discussed but this looks like we now get to make a decision. By the look of it this has little to do with the shape of the gun but more to do with getting the track cut and the trigger fitted.
 
If you use the recessed track then i think you reduce the vertical stiffness of the gun quite significantly - if that might be a problem? in the image of the 2 tracks the effective thickness (for stiffness) is about 1/4 less on the recessed track, so 0.42 x the stiffness...
I like the idea of the enclosed the track for hiding the bands - reducing that vibration when you track sideways...
 
i voted recessed, not that i feel that the vibration will be bad on a single 90, but hey its a special gun we are building so i went with the "new" feature...
 
Jonny - instead of thinking of it as 1/4 less material in the center, I thought of is as having a bit more material on the sides (though there probably will be a bit less in the center - GITS?)

Would the band need to be completely hidden to eliminate vibration?

And what is the diameter of the band when stretched - how deep will the recess be?
 
Lockedin said:
Would the band need to be completely hidden to eliminate vibration?
Click to expand...

I thought that too, maybe it would not have to be full depth. But if your going to go there, go all the way? a 19mm band fully stretched on a 90cm gun ends up at about... 12mm - 14mm I think. I would have to measure it to be certain. How tall was the gun? I'd have to look, wasn't it 20cm? Once reshaped though.....
 
The dimensions of the uncut blank for the gun.... I could not remember. And cm is a bit much mm maybe, me and the metric system.... I should have taken more time before I posted. I could not recall the starting point. 50mm x 50mm x 1500mm. I knew the length, could remember the height.

So if it is made to an oval shape, we lose material in the height a little. If it stayed at 50mm, the band channel could be 10mm and you lose 1/5 of the barrels strength. But changing the shape of the barrel, I'm not sure what the effects are.

So as far as the channel covering the entire band. I don't thing it would have too. And I'm not sure it can once the gun is re-shaped to be oval (If that is the shape it will be).

It's a little hard for me to visualize the gun and "if" it will all work out. Starting with a 50mm square and going to oval, seems thin to me. I looked, but can't find it at the moment, for the dimensions with the taper.
 
Reactions: Pastor
I wonder if I asked the Gits if he could build some sort or prototype out of soft wood or something, he might have more idea if a recessed track would be feasible?
I would be worried about the necessary dimensions, might be a bit big for a 90 euro?
 
If I had a copy of AutoCAD still, or a 3D modeling program....that would be the way to go...

I think with the dimensions we we started with, 50mm x 50mm, that is not wide at all for trying to notch out. Then trying to make it oval, makes it even tougher. How tall is a normal wood gun? I'm used to a Cayman that has an inner diameter of 25mm and it is plenty stiff. I don't know what thickness the wood has to be.

Maybe a half oval for the bottom and a flat top, with enough recess to make the bands 1/2 or 2/3 recessed?


*****Added 2 more rough ideas. The grid is 5mm squares.*****
*****Recesses may not be deep nor wide enough, but this*****
*****Should give you an idea of where I'm coming from *****
 

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Reactions: Spaniard
I suppose a recessed track rules out the possibility of ever adding an extra band-though two bands don't really work on a 90cm gun anyway.
Think I'll listen to a bit more discussion before voting. At the moment I'd go for recessed though.
 
sunfish said:
I suppose a recessed track rules out the possibility of ever adding an extra band-though two bands don't really work on a 90cm gun anyway.
Think I'll listen to a bit more discussion before voting. At the moment I'd go for recessed though.
Click to expand...

Im in the same boat. I was thinking the same thing about the second band but I guess we already voted for the single band 90.
 

I really like the idea but with a flat platform like that on top wouldnt that make it really hard to move up? I know I only speak for myself but most my hunting is done lying "aspeto" (sp?) on the bottom. tracking fish usually happens laterally and upwards if you fallow.

As far as the thickness, my riffe euro is a 110 and the stock is ~80mm wide and only ~22mm thick. I am able to load either 3-9/16(14mm) or stock which was 2 16mm bands. and Im pretty sure 2 18mm bands will work on it as well.

In short I think 50mm as a thickness is ample to play with.
 
Well, the OMER HF is almost 50mm wide. I would have to measure it though. I added another rough sketch. The top sides could be rounded over to help. It would also still move a little easier than the 80mm wide Riffe mentioned above. As I look at it closer, I kinda like it. It also goes to Pastor's original idea in the pre-poll thread. Crap, we need another idea, we can't live with Pastor having been right all along!
 
:blackeye

OK, Im convinced, your third drawing did it for me. Im voting recessed track, that is almost as appealing as the trucker girl profiles on the back of the mack-truck mud flaps!
 
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