Main Discussion Area > Flight Bows
High gear/low gear
DC:
--- Quote from: sleek on April 11, 2019, 12:40:50 pm --- Just because the arrow goes 300 fps it doesnt mean anything if the bow is only putting 50% its energy into it.
--- End quote ---
It does mean something, it means the arrow is going 300 fps and it's going to go farther than a 200 fps arrow no matter how much energy was gained lost or wasted up to the time the arrow left the string.
sleek:
--- Quote from: DC on April 11, 2019, 01:08:57 pm ---
--- Quote from: sleek on April 11, 2019, 12:40:50 pm --- Just because the arrow goes 300 fps it doesnt mean anything if the bow is only putting 50% its energy into it.
--- End quote ---
It does mean something, it means the arrow is going 300 fps and it's going to go farther than a 200 fps arrow no matter how much energy was gained lost or wasted up to the time the arrow left the string.
--- End quote ---
I guess if your only goal is speed no matter how it got there, then you have a solid point. But with how it relates to gearing, to hold a more solid comparrison, keeping draw weight and length the same, you need to work with effeciency.
DC:
Tru nuff ;D
avcase:
--- Quote from: DC on April 11, 2019, 09:10:56 am ---But a bow that shoots a 2 grain arrow at 250 fps will always shoot a 1 grain arrow a little faster. Right?
--- End quote ---
Yes, speed will increase all the way to a dry-fire, similar to what Del’s graph shows, but not all designs do this at the same rate. This is why it is possible for a design that is good at flinging heavy arrows to be bypassed by a lower energy storage bow when shooting lighter arrows.
Del,
Is the graph an extrapolation based on virtual mass? Virtual mass is also not so constant either. If you do a lot of testing over a wide range of arrow weights, some designs will show a pretty consistent virtual mass regardless of arrow weight, others show decreasing virtual mass with progressively lighter arrows, and some designs will show the increasing virtual mass with lighter arrows.
sleek:
Last mojam i upped my arrow weight and was shootung further with 13 grain vs 10gpp. It may have been the arrow, idk, but anobody else notice arrows gping further with heavier weight?
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