ASTM F1722-09
(Test Method)Standard Test Method for Determining Mass and Moment of Inertia of Alpine Skis
Standard Test Method for Determining Mass and Moment of Inertia of Alpine Skis
SIGNIFICANCE AND USE
This test method provides a means for determining the mass and moment of inertia of adult Alpine skis. It is not intended to evaluate data with regard to the quality of the ski.
SCOPE
1.1 This test method covers test measurement methods for mass and moment of inertia of adult Alpine skis.
1.2 No limitation to ski size is proposed. This test method is applicable to all adult Alpine skis.
1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
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Designation: F1722 − 09
StandardTest Method for
1
Determining Mass and Moment of Inertia of Alpine Skis
This standard is issued under the fixed designation F1722; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope 4. Significance and Use
1.1 This test method covers test measurement methods for 4.1 This test method provides a means for determining the
2
mass and moment of inertia of adult Alpine skis. mass and moment of inertia of adult Alpine skis. It is not
intended to evaluate data with regard to the quality of the ski.
1.2 No limitation to ski size is proposed.This test method is
applicable to all adult Alpine skis.
5. Apparatus
1.3 The values stated in SI units are to be regarded as
5.1 Weighing Device, accurate to 60.02 kg.
standard. No other units of measurement are included in this
standard.
5.2 Fulcrum, for locating the center of gravity of the ski.
1.4 This standard does not purport to address all of the
5.3 Time Measurement Device (stopwatch), accurate to at
safety concerns, if any, associated with its use. It is the
least 0.1 s.
responsibility of the user of this standard to establish appro-
5.4 Measuring Device, in accordance with Fig. 1, consisting
priate safety and health practices and determine the applica-
of the following parts:
bility of regulatory limitations prior to use.
5.4.1 Clamping Device, A, consisting of two clamping
2. Referenced Documents fixtures. The top clamping fixture has a hole with a mark to
3 locate the center of gravity and two additional holes at a
2.1 ASTM Standards:
distance, d, from the center mark for fixation of the filaments,
f
F472 Terminology for Geometry of Alpine Skis
4 B. The recommended dimension for d is 25 mm, and the mass
f
2.2 ISO Standards:
of the clamping device shall be less than 0.1 kg.
ISO 554 Standard Atmospheres for Conditioning and/or
5.4.2 Top Plate, C, with two holes separated by the distance
Testing—Specifications
2d for the fixation of filaments, B. The plate, C, shall be fixed
f
ISO 6003 Alpine Skis—Determination of Mass and Polar
on a stiff, horizontal beam.
Moment of Inertia—Laboratory Measurement Method
5.4.3 Two Filaments, B, with equal lengths, l, that connect
3. Terminology the top plate with the clamping device. The ratio d:l shall be
f
approximately1:40.Withtherecommendeddimension d =25
f
3.1 Definitions of Terms Specific to This Standard:
mm, and the length, l = 1000 mm.The filaments shall be made
3.1.1 mass of ski, m—the mass of a finished, manufactured
of materials with low elongation and high strength (for
ski without any mounted parts, expressed in kilograms.
example, tennis racket string and fishing line). The diameter of
3.1.2 moment of inertia, I—the mass moment of inertia of
the filaments shall be not more than 1.0 mm.
theskiaboutitscenterofgravity,expressedinkilogram-metres
squared.
6. Sampling and Conditioning
6.1 In order to ensure comparability, it is recommended that
1
This test method is under the jurisdiction of ASTM Committee F27 on Snow
one of the following ski sizes be used if the data measured are
Skiing and is the direct responsibility of Subcommittee F27.30 on Skis and Boots.
tobepublished:150,165,or185cm.Theskisize,measuredby
CurrenteditionapprovedJune1,2009.PublishedJuly2009.Originallyapproved
in 1996. Last previous edition approved in 2003 as F1722 – 96 (2003). DOI:
chord length (see Terminology F472 for the definition of chord
10.1520/F1722-09.
length), should be within 3 cm of the value chosen. From these
2
This test method is meant to conform in all significant aspects to the test
three sizes, choose the one that is most representative of the
method for determining mass and polar moment of inertia ofAlpine skis as set forth
tested model.
in ISO 6003.
3
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
6.2 All measurements shall be taken from a finished, manu-
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on factured ski without any mounted parts.
the ASTM website.
4
6.3 Allmeasurementsshallbetakenfromaskithathasbeen
Available from American National Standards Institute, 11 W. 42nd St., 13th
Floor, New York, NY 10036. conditioned in a standard atmosphere 20/65 (ISO 554) (that is,
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
F1722 − 09
where:
a = length of the bar, m,
b = width of the bar, m, and
m = mass of the bar, kg.
7.4 Using this theoretical value and
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation:F1722–96 (Reapproved 2003) Designation: F 1722 – 09
Standard Test Method for
1
Determining Mass and Moment of Inertia of Alpine Skis
This standard is issued under the fixed designation F 1722; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope
2
1.1 This test method covers test measurement methods for mass and moment of inertia of adult Alpine skis.
1.2 No limitation to ski size is proposed. This test method is applicable to all adult Alpine skis.
1.3The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility
of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory
limitations prior to use.
2. Referenced Documents
3
2.1 ASTM Standards:
F 472 Terminology for Geometry of Alpine Skis
4
2.2 ISO Standards:
ISO 554 Standard Atmospheres for Conditioning and/or Testing—Specifications
ISO 6003 Alpine Skis—Determination of Mass and Polar Moment of Inertia—Laboratory Measurement Method
3. Terminology
3.1 Definitions of Terms Specific to This Standard:
3.1.1 mass of ski, m—the mass of a finished, manufactured ski without any mounted parts, expressed in kilograms.
3.1.2 moment of inertia, I—the mass moment of inertia of the ski about its center of gravity, expressed in kilogram-metres
squared.
4. Significance and Use
4.1 This test method provides a means for determining the mass and moment of inertia of adult Alpine skis. It is not intended
to evaluate data with regard to the quality of the ski.
5. Apparatus
5.1 Weighing Device, accurate to 60.02 kg.
5.2 Fulcrum, for locating the center of gravity of the ski.
5.3 Time Measurement Device (stopwatch), accurate to at least 0.1 s.
5.4 Measuring Device, in accordance with Fig. 1, consisting of the following parts:
5.4.1 Clamping Device, A, consisting of two clamping fixtures. The top clamping fixture has a hole with a mark to locate the
center of gravity and two additional holes at a distance, d, from the center mark for fixation of the filaments, B.The recommended
f
dimension for d is 25 mm, and the mass of the clamping device shall be less than 0.1 kg.
f
5.4.2 Top Plate, C, with two holes separated by the distance 2d for the fixation of filaments, B. The plate, C, shall be fixed on
f
a stiff, horizontal beam.
5.4.3 Two Filaments, B, with equal lengths, l, that connect the top plate with the clamping device. The ratio d:l shall be
f
approximately 1:40. With the recommended dimension d = 25 mm, and the length, l = 1000 mm. The filaments shall be made of
f
1
This test method is under the jurisdiction of ASTM Committee F27 on Snow Skiing and is the direct responsibility of Subcommittee F27.30 on Skis and Boots.
Current edition approved Feb. 10, 2003. Published May 2003. Originally approved in 1996. Last previous edition approved in 1996 as F1722–96.
Current edition approved June 1, 2009. Published July 2009. Originally approved in 1996. Last previous edition approved in 2003 as F 1722 – 96 (2003).
2
This test method is meant to conform in all significant aspects to the test method for determining mass and polar moment of inertia of Alpine skis as set forth in ISO
6003.
3
Available from American National Standards Institute, 11 W. 42nd St., 13th Floor, New York, NY 10036.
3
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
4
Available from American National Standards Institute, 11 W. 42nd St., 13th Floor, New York, NY 10036.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1
---------------------- Page: 1 ----------------------
F1722–09
FIG. 1 Measuring Device
materials with low elongation and high strength (for example, tennis racket string and fishing line). The diameter of the filaments
shall be not more than 1.0 mm.
6. Sampling and Conditioning
...
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