ASTM F1544-2004 Standard Specification for Determining the Rating Velocities of an Archery Bow《测定弓箭额定速率的标准规范》.pdf

1、Designation: F 1544 04An American National StandardStandard Specification forDetermining the Rating Velocities of an Archery Bow1This standard is issued under the fixed designation F 1544; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revi

2、sion, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) 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 an archery b

3、ow.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 d

4、eter-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 the standard. The values given in parentheses are forinformation only.1.5 The following safety hazards caveat pertains only to thetest meth

5、ods 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 appropriate safety and healthpractices and determine the applicability of regulatory l

6、imita-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 vertical line through the pivot point of the bowgrip, +134 in. (44 mm).2.1.2 dra

7、w 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-draw curvethe graph curve generated by re-cording the draw force readings of an archery bow at 1.00- i

8、n.(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, nthe initial velocities of a 360-grain (23.33-g) arrow and a 540-grain (34.99-g) arrow shotfrom a

9、bow set at 60-lb (267-N) peak draw force and 30-in.(762-mm) ATA draw length.2.1.5 shooting machinea device, equipped with a me-chanical release, that secures a bow and releases an arrow toobtain highly repeatable shooting results for various testingpurposes.2.1.6 stored energythe energy required to

10、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 determine 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,

11、 adjust peak ormaximum draw force to 60 6 1 lb (267 6 1 N). Forconventional bows and bows without let-off, the 60-lb maxi-mum draw force shall be attained or held at 2814-in. (717-mm)DLPP (30-in. (762-mm) ATA) draw length. The center of thevalley of the force-draw curve (lowest force) on compoundbow

12、s shall be located at 2814-in. DLPP, 614 in. (6 mm).4.1.2 For bows with nonadjustable draw force, the drawforce shall fall between 60 and 65 lb (267 and 289 N). Adjustthe rating velocity mathematically to the 60-lb (267-N) level ofdraw force (refer to 4.5.2). Performance of this item is notnecessary

13、 if the bows draw force needs no adjustment.4.1.3 Measure and record the draw force at 1.00-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 the force-draw curve, determine the peak ormaximum draw force and the holdin

14、g force at the standard testdraw length of 2814-in. (717-mm) DLPP (30-in. (762-mm)ATA).4.2 Test Arrows:4.2.1 Select the test arrows of a shaft material, size, andstiffness to match the specified standard test peak draw forceand draw length, and meet the 360-grain (23.33-g) and540-grain (34.99-g) wei

15、ght requirement (60.5 grain (0.03 g).4.2.2 The arrows need not be fletched.4.3 Set up the test bow in the shooting machine.1This specification is under the jurisdiction of ASTM Committee F08 on SportsEquipment and Facilities and is the direct responsibility of Subcommittee F08.16 onArchery Products.

16、Current edition approved May 1, 2004. Published May 2004. Originallyapproved in 1994. Last previous edition approved in 1999 as F 1544 99.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.4.3.1 Mount the bow in a shooting machine with

17、a mechani-cal release. Set the draw length at 2814-in. (717-mm) DLPP (306116-in. (762 6 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 th

18、e standard test arrows to obtain a satisfactoryarrow velocity averages. The velocity values of all shots for agiven test arrow must fall within a range of 2 ft/s (0.60 m/s).Photoelectric-type gate or trigger circuits spaced no more than48 in. (1219 mm) apart, are satisfactory for use in conjunctionw

19、ith the chronograph.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 require correction to conform to standardconditions.4.5.2 On bows with nonadjustable draw force, the actualmeasured peak draw f

20、orce may differ from the standard 60 lb(267 N) specified (refer to 4.1.2). If this situation exists, thenmake the following correction:corrected rating velocity 5 671$P.D.F. standard!% V2450 240 $P.D.F. test!%(1)where:V = actual average chronographed velocity,ft/s or m/s (see 4.5.1),P.D.F.(standard)

21、= standard peak draw force, either 60 lbor 267 N, if using SI units, andP.D.F. (test) = peak draw force measured for test bow(see 4.1.2) in inch-pound or SI units asapplicable within14 lb (1 N).5. Keywords5.1 draw length; force draw curve; rating velocity; shootingmachine; stored energyASTM Internat

22、ional takes no position respecting the validity of any patent rights 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 the

23、ir own responsibility.This standard is subject to revision at any 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

24、be addressed to ASTM International Headquarters. Your comments will 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 Standar

25、ds, at the address shown below.This standard is copyrighted by ASTM 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).F1544042