How to make Bangpae2012.03.09 23:29

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by Hong,Hae-Myoung

Waist is one of the important factors to decide the tracking-going straight- and quick turning performance in Bangpae.Absolutely the most important spar is diagonals, but so is the waist. You can see the differences between the curve patterns in below figures.The strength of center part is different, the top is weakest at center part, the bottom strongest. What kind of differences could you imagine? We can say the top type absorbs shocks well, it means weaker center helps Bangpae to ride on the wind well and makes its tracking performance be better.On the contrary, the bottom is better in its turning speed because its center is strong.The red pattern is focused on making the center part extremly weak.The bottom is that of horse's hoof pattern.Personally I like those of the top and middle one. As Bangpae size goes bigger from 400 x 470, the lower pattern is needed.Most important thing is to harmonize together between each spars. Elastic tension and curve pattern of each spars! Suitable tension of waist for the 400 x 470 sized Bangpae is around 15 (gram.force) and it also processed by using groove blade.

 To process the waist by using grooved blade.

To see and check the bending curve pattern, you can see the left side of below picture is thicker than left side, you need to scrape more the thicker left side.

Finally, check whether overall curve pattern is you need and the curve radius is same in both side.Recommended tension is around 15(gram.force) for the 400 x 470 sized Bangpae as I told above.

I describe my way briefly on waist processing below with pictures from tempering to machining.Tempering -> Straightening -> Successive half split -> machinning.

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