Inner tube clamping method

[Bvas]

Originally posted by kenneth butler:
The rope goes under the pressure strip to increase pressure down the center line correct?thanks.Ken

No. The rope goes on top of the pressure strip.

[Bvas]

By adding rope, cord, or whatever..... you are creating a convex profile for your pressure strip. If not, the bands will pull more tension on the edges, and not evenly across the width of the limb.

[arachnid]

Originally posted by Bvas:
 

Originally posted by kenneth butler:
The rope goes under the pressure strip to increase pressure down the center line correct?thanks.Ken

No. The rope goes on top of the pressure strip. [/b]

I also thought that it gos on the bottom side. My pressure strip is a piece on thin wood and the bottom side is covered with rubber, so I glued a strip of narrow rubber along the middle of the bottom side.
Guess I'll change that now...

[Gundog68]

I did all ways. Innertube, Hoses , clamps.
Clamps are the savest. The work all the time in every condition. But the need the most time. Pressure hoses are fine, but i had to learn a lot because the first try the pressure leaks and that makes you hurry.. after fixing all the weak points this works fine.
Innertubes are the easiest way. But be aware of to much heat in a heat box. They make the innertubes weak.
One way is  to use the inner tube method and put the hose above it. Just secure the hose with a rope. This methoth allows you to do the layout proper. Nothing will move when the pressure starts. You also do not need a top half of the form for those who will change some details in the layout.
You can also use the inner tubes and extra packing tape (for packing parcels) in difficult places. THis can be stretched too.
Currently i have the form so small it has about 3" parallel height to the contour of the bow. So i can wrap what i want. But this does not work with the air-hose ... it will crash the form.

[arachnid]

Originally posted by Gundog68:

One way is  to use the inner tube method and put the hose above it. Just secure the hose with a rope. This methoth allows you to do the layout proper. Nothing will move when the pressure starts. You also do not need a top half of the form for those who will change some details in the layout.

That's a very good idea... Anyone else tried it?

[kenneth butler]

Thanks guys. I did understand that backwards. Ken

[Gundog68]

It was not my intention.. but it works fine.

[MikeF]

For those who have not seen Dave Watson's videos it may help explain a few things. I'm not a bow builder yet but I like the simple explanation he gives to things.

https://www.youtube.com/watch?v=ZytfxEp8AMw

[kennym]

I actually tried a band form with a hose and pressure strip secured with nylon rope(no stretch) just like you would put bands on.

It worked well except at the fades, got a bit of a fat glue line there and went back to the regular air hose form.