Journal of the Japanese Society of Snow and Ice

On the Resistance in Penetrating the Snow Sampler

53 Kamuro Type Snow Sampler

TADAYUKI ÔNUMA

1958Volume 20Issue 3 Pages 65-70
Published: 1958
Released on J-STAGE: September 04, 2009

DOIhttps://doi.org/10.5331/seppyo.20.65

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When the Snow Sampler is pierced into snow, it pushes aside the same volume of snow as that of the steel part of it. To make the penetration easier, it is obviously necessary to frame a sampler which can push aside the less volume of snow; in other words, it must be as thin as possible. The tooth-cutter cannot decrease the volume (of snow removed) and, moreover, causes inexpediencies for practical use.
By Stern's Theory on the Fundamental Resistance, the Resistance in the interpretation (R) is...
R=π/2 ξf¹.DS²/sin2θ (sinθ+μcosθ)
Making a steel sampler, thin (D 60mm.S 4.8mm), with the edge angle of 5°, we called it “53 Kamuro Type Snow Sampler”.
This is handier (1/2-1/4), as we expected, not only in piercing, but in treating at the actual spot, having improved the driving wrench and the screw couplings.
ξf¹ : modulus by the quality of snow
θ : angle on the pointed end
μ : modulus of friction between snow and the cutter
D : the outer diameter
S : the thickness of the pipe

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Erros in the snow Sampling Measurement and a New Type Cutter of the Snow Sampler

TADASHI HONDA, KIICHI YAKAME

1958Volume 20Issue 3 Pages 71-74
Published: 1958
Released on J-STAGE: September 04, 2009

DOIhttps://doi.org/10.5331/seppyo.20.71

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As the result of the experimental sampling by several samplers, we find that errors of measurement are almost due to the revolution of the cutter of the snow sampler. Chips of snow ice are produced by the revolution of the cutting edge and some of them enter into the pipe of the sampler and they cause errors.
We designed and trially manufactured a new type of the cutter which would not permit the entrance of chips of snow into the pipe of the sampler.

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Loading Capacity of Ice-plate (1)

YOSHIMITSU KUBO

1958Volume 20Issue 3 Pages 75-78
Published: 1958
Released on J-STAGE: September 04, 2009

DOIhttps://doi.org/10.5331/seppyo.20.75

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[title in Japanese]

[in Japanese]

1958Volume 20Issue 3 Pages 86-87
Published: 1958
Released on J-STAGE: September 04, 2009

DOIhttps://doi.org/10.5331/seppyo.20.86

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[title in Japanese]

[in Japanese]

1958Volume 20Issue 3 Pages 88-90
Published: 1958
Released on J-STAGE: September 04, 2009

DOIhttps://doi.org/10.5331/seppyo.20.88

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Erratum

1958Volume 20Issue 3 Pages 96
Published: 1958
Released on J-STAGE: September 04, 2009

DOIhttps://doi.org/10.5331/seppyo.20.3_96

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