ASTM F1544-99
(Specification)Standard Specification for Determining the Rating Velocities of an Archery Bow
Standard Specification for Determining the Rating Velocities of an Archery Bow
SCOPE
1.1 This specification covers the testing technique to determine the rating velocity of an archery bow.
1.2 This specification will provide only a certification of performance; that is, the velocity at which a given bow will launch an arrow of a specified weight under standard conditions.
1.3 This specification is not intended to provide any engineering or structural evaluation of the bow that would determine its fitness for the use intended, safe function, or any other attribute except as stated.
1.4 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only.
1.5 The following safety hazards caveat pertains only to the test methods portion, Section 4, of this specification: 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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An American National Standard
Designation: F 1544 – 99
Standard Specification for
Determining the Rating Velocities of an Archery Bow
This standard is issued under the fixed designation F 1544; 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope from a bow set at 60-lb (267-N) peak draw force and 30-in.
(762-mm) AMO draw length.
1.1 This specification covers the testing technique to deter-
2.1.5 shooting machine—a device, equipped with a me-
mine the rating velocities of an archery bow.
chanical release, that secures a bow and releases an arrow to
1.2 This specification will provide only a certification of
obtain highly repeatable shooting results for various testing
performance; that is, the velocities at which a given bow will
purposes.
launch arrows of specified weights under standard conditions.
2.1.6 stored energy—the energy required to draw a bow
1.3 This specification is not intended to provide any engi-
from brace height to full draw, usually expressed in foot-
neering or structural evaluation of the bow that would deter-
pounds (joules).
mine its fitness for the use intended, safe function, or any other
attribute except as stated.
3. Significance and Use
1.4 The values stated in inch-pound units are to be regarded
3.1 This specification will be used to determine a velocity
as the standard. The values given in parentheses are for
under standard test conditions for rating an archery bow.
information only.
1.5 The following safety hazards caveat pertains only to the
4. Test Methods
test methods portion, Section 4, of this specification: This
4.1 Force Draw Data:
standard does not purport to address all of the safety concerns,
4.1.1 For bows with adjustable draw force, adjust peak or
if any, associated with its use. It is the responsibility of the user
maximum draw force to 60 6 1 lb (267 6 1 N). For
of this standard to establish appropriate safety and health
conventional bows and bows without let-off, the 60-lb maxi-
practices and determine the applicability of regulatory limita-
mum draw force shall be attained or held at 28 ⁄4-in. (717-mm)
tions prior to use.
DLPP (30-in. (762-mm) AMO) draw length. The center of the
2. Terminology valley of the force-draw curve (lowest force) on compound
1 1
bows shall be located at 28 ⁄4-in. DLPP, 6 ⁄4 in. (6 mm).
2.1 Definitions of Terms Specific to This Standard:
4.1.2 For bows with nonadjustable draw force, the draw
2.1.1 archery manufacturers organization (AMO) draw
force shall fall between 60 and 65 lb (267 and 289 N). Adjust
length, n—the distance at the archer’s full draw from the string
the rating velocity mathematically to the 60-lb (267-N) level of
at the nocking point to a vertical line through the pivot point of
draw force (refer to 4.5.2). Performance of this item is not
the bow grip, +1 ⁄4 in. (44 mm).
necessary if the bows draw force needs no adjustment.
2.1.2 draw length pressure point (DLPP) draw length,
4.1.3 Measure and record the draw force at 1.00-in. (25.4-
n—the distance at the archer’s full draw from the string at the
mm) (or less) increments from brace height to at least 28 ⁄4 in.
nocking point to a vertical line through the distal or pivot point
(717-mm) DLPP (30-in. (762-mm) AMO) draw length.
of the bow grip.
4.1.4 From the force-draw curve, determine the peak or
2.1.3 force-draw curve—the graph curve generated by re-
maximum draw force and the holding force at the standard test
cording the draw force readings of an archery bow at 1.00- in.
draw length of 28 ⁄4-in. (717-mm) DLPP (30-in. (762- mm)
(25.4-mm) intervals or less, from brace height through set
AMO).
weight and to the center
...
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