1、Designation: F1544 09An American National StandardStandard Specification forDetermining the Rating Velocities of an Archery Bow1This standard is issued under the fixed designation F1544; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revisi
2、on, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This specification covers the testing technique to deter-mine the rating velocities of a compound bow.
3、1.2 This specification will provide only a certification ofperformance, that is, the velocities at which a given bow willlaunch arrows of specified weights under standard conditions.1.3 This specification is not intended to provide any engi-neering or structural evaluation of the bow that would dete
4、r-mine its fitness for the use intended, safe function, or any otherattribute except as stated.1.4 The values stated in inch-pound units are to be regardedas standard. The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered
5、 standard.1.5 The following safety hazards caveat pertains only to thetest methods portion, Section 4, of this specification: Thisstandard does not purport to address all of the safety concerns,if any, associated with its use. It is the responsibility of the userof this standard to establish appropr
6、iate safety and healthpractices and determine the applicability of regulatory limita-tions prior to use.2. Terminology2.1 Definitions of Terms Specific to This Standard:2.1.1 archery trade association (ATA) draw length, nthedistance at the archers full draw from the string at the nockingpoint to a v
7、ertical line through the pivot point of the bow grip134 in. (+14 in., 0 in.) (44 + 6.4 0 mm).2.1.2 draw length pressure point (DLPP) draw length,nthe distance at the archers full draw from the string at thenocking point to a vertical line through the distal or pivot pointof the bow grip.2.1.3 force-
8、draw curvethe graph curve generated by re-cording the draw force readings of an archery bow at 1.0-in.(25.4-mm) intervals or less, from brace height through setweight and to the center of the valley (if present), in order toreveal the energy storage characteristics of the bow.2.1.4 rating velocities
9、, nthe initial velocity of an arrowweighing 5 grains per pound (0.073 g/N) of the bows PeakDraw Force (60.5 grains on total arrow weight) (60.073g)from a bow set at no more than 70 612 lb (311.4 N) PeakDraw Force and 30 in. (762 mm) ATA actual draw length.Example: a 70-lb Peak Draw Force bow require
10、s the use of a350 grain arrow (60.5 grains on total arrow weight)(60.073g). A minimum of (5) shots for each test must beperformed. Test shot velocities will then be averaged todetermine the ATA Compound Bow Rating Velocity.2.1.5 shooting machinea device, equipped with a me-chanical release, that sec
11、ures a bow and releases an arrow toobtain highly repeatable shooting results for various testingpurposes.2.1.6 stored energythe energy required to draw a bowfrom brace height to full draw, usually expressed in foot-pounds (joules).3. Significance and Use3.1 This specification will be used to determi
12、ne a velocityunder standard test conditions for rating an archery bow.4. Test Methods4.1 Force Draw Data:4.1.1 For bows with adjustable draw force, adjust peak ormaximum draw force to no more than 70 612 lb (311.4 6 1N). The center of the valley of the force-draw curve (lowestforce) attained after h
13、aving passed through the peak or maxi-mum draw force shall be located at 2814-in. (717.6 mm) DLPP,+14 0 in. (6 mm).4.1.2 If the bows draw force cannot be adjusted to 70 6 0.1lb (311.4 N) and an appropriate weight arrow cannot beobtained, the test can be performed with a 350 6 0.5 grain(22.75 6 0.03
14、g) arrow and the rating velocity can be adjustedmathematically to the 70 lb (311.4 N) level of draw force (referto 4.5.2).4.1.3 Measure and record the draw force at 1.0-in. (25.4-mm) (or less) increments from brace height to at least 2814-in.(717-mm) DLPP (30-in. (762-mm) ATA) draw length.4.1.4 From
15、 the force-draw curve (obtained in 4.1.3), deter-mine the peak or maximum draw force that occurs between thebrace position of the bow and the full draw length of 2814-in.(717-mm) DLPP (30-in. (762-mm) ATA).1This specification is under the jurisdiction of ASTM Committee F08 on SportsEquipment and Fac
16、ilities and is the direct responsibility of Subcommittee F08.16 onArchery Products.Current edition approved Dec. 1, 2009. Published January 2010. Originallyapproved in 1994. Last previous edition approved in 2004 as F1544 04. DOI:10.1520/F1544-09.1Copyright ASTM International, 100 Barr Harbor Drive,
17、 PO Box C700, West Conshohocken, PA 19428-2959, United States.4.2 Test Arrows:4.2.1 Select the test arrows of a shaft material, size, andsufficient spine to match the test bows Peak Draw Force anddraw length. The test arrows must also meet the 5 grain perpound (0.073 g/N) of the test bows Peak Draw
18、Force weightrequirement (60.5 grain (0.03 g). (Refer to example shown in2.1.4).4.2.2 The arrows need not be fletched.4.3 Set up the test bow in the shooting machine.4.3.1 Mount the bow in a shooting machine with a mechani-cal release. Set the draw length at 2814-in. (717-mm) DLPP (306116-in. (762 6
19、1.58-mm) ATA).4.3.2 Set the initial chronograph gate at a distance of 36 in.(914 mm) from the pivot point of the bows handle.4.4 Shooting Test:4.4.1 Chronograph a minimum of five shots for each testarrow using the standard test arrow to obtain a satisfactoryarrow velocity average. The average veloci
20、ty is determinedfrom a minimum of five shots of the test arrow in which no testvelocity more than 2 ft/s (0.61 m/s) from any other testvelocity.4.4.2 Use an appropriate multiple gate chronograph.4.5 Correction of Test Data:4.5.1 The average arrow velocity value obtained from theshooting test may req
21、uire correction to conform to standardconditions.4.5.2 On bows with nonadjustable draw force, or bows thatare tested at peak draw force other than the standard 70 lb(311.4 N) specified (refer to 4.1.2). The test bow can be testedusing the standard 350 6 0.5 grain (22.75 6 0.03 g) test arrowand the r
22、ating velocity can be obtained by using the followingcorrections:corrected rating velocity 5 V PDF std!PDF test!(1)where:V = the average chronographed velocity ft/s or m/s(see 4.5.1) of the 350 6 0.5 grain test arrow,PDF (std) = standard peak draw force, either 70 lb or 311.4N, if using SI units, an
23、dPDF(test)= peak draw force measured for test bow (see4.1.2) in inch-pound (or in N for SI units) asapplicable within14-lb (1 N).5. Keywords5.1 draw length; force draw curve; rating velocity; shootingmachine; stored energyASTM International takes no position respecting the validity of any patent rig
24、hts asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any
25、 time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments wi
26、ll receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by AS
27、TM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org). Permission rights to photocopy the standard may also be secured from the ASTM website (www.astm.org/COPYRIGHT/).F1544 092
