Main Discussion Area > English Warbow

Spine consideration for war arrows

<< < (6/9) > >>

Glennan:
From "The Great Warbow" by Hardy & Strickland:

Arrow:  John Holder Challenge Cup specification arrow (31.5", 2.6oz, 8.5" x 0.75" fletches)

Bow: 150lb @ 32"

Initial velocity: 189.7 ft/s
Impact velocity: 147.3 ft/s

Initial KE: 124J
Impact KE: 75J

Average Range: 282 yards

(Highest velocity: BLBS 'Standard' Arrow shot off 150lb bow - 232 ft/s)

Badger:
The performance of the bow posted above is outstanding, on a grains per pound comparison about the same as a very well made american longbow. I figured the kinetic energy upon release a bit lower though at about 91ft#'s. Still excellent.Steve

SimonUK:
I'm sure there's something wrong with those figures.  The mass of the arrow doesn't change, therefore shouldn't the kinetic energy be proportional to its velocity? Therefore 147.3/189.7 should equal 75/124 but it doesn't. Where's Gino when we need him?

Badger:
Simon, velocity squared times mass divided by 450240= kinetic energy
189X189X1138 grains divided by 450240=90.2 ft#'s kinetic energy
147X147X1138 grains divided by 450240=54.6 ft#'s kinetic energy

SimonUK:
I knew I should have looked up the formula before I opened my mouth  :-[

Navigation

[0] Message Index

[#] Next page

[*] Previous page