Main Discussion Area > English Warbow
Spine consideration for war arrows
duffontap:
Good post Rod. The English war arrows were also designed in such a way that spine matered less. Large diameter provided sufficient stiffness for most arrow woods, the taper kept the vibration down, the FOC way forward and long, low fletchings provided adequate drag to right the arrows.
Another thing to consider is that English Warbows shot arrows at very high speeds (well over 200 fps was probably common or even slow) so less fletching was required to stabilize the arrow. (It is a general principle of aerodynamics that the drag increases as the speed increases. Thus, a faster arrow needs less fletching to right itself. This is why slow arrows tend to wobble in flight and fast ones tend to fly like darts).
J. D. Duff
Len:
J.D. never knew that about wobbly arrows but know I know why my arrows that wobbled out of my 50lb ELB shoot fine out of the 66lber I made.
duffontap:
--- Quote from: Len on August 07, 2007, 05:54:51 pm ---J.D. never knew that about wobbly arrows but know I know why my arrows that wobbled out of my 50lb ELB shoot fine out of the 66lber I made.
--- End quote ---
Len,
There can be a lot of reasons why arrows wobble (yaw or porpoise) through the air but there is a tendency for fast arrows to have smoother flight and slower arrows to have more tuning issues. You never stop learning with this hobby--or is it a fascination...
J. D.
duffontap:
--- Quote from: J. D. Duff on August 07, 2007, 01:26:44 pm ---
Another thing to consider is that English Warbows shot arrows at very high speeds (well over 200 fps was probably common or even slow)
J. D. Duff
--- End quote ---
That sounds a little dumb. What I meant to say was speeds over 200 fps was probably the norm and 200 fps may even have been slow at the height of the warbow. At any rate, the arrows traveled much faster, on average, that what we are used to with hunting and target bows. :)
J. D.
SimonUK:
I didn't know that JD. I always thought that the arrows were quite slow but with high momentum due to their weight. If they were heavy and fast, the performance of those bows must have been amazing.
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