Vane angle app. 0.5 deg
Windtest of vane for arrows
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Windtunnel speed 60 m/s. |
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Arrow Easton FatBoy 340 30 inch 8.3 gpi |
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Vane App. 100 mm |
Weight (gr) |
Drag force (mN) |
Rev/sek |
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QuikSpin plastic |
25.2 |
373 |
49 |
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Standard plastic |
24.3 |
334 |
11 |
Vane angle app. 0.5 deg
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Arrow shot to a target at a distance of 18 meter |
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Vane 100 mm |
Start speed |
Finish speed |
Revolutions |
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QuikSpin plastic |
60 m/s |
55.5 m/s |
App. 14 |
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Standard plastic |
60 m/s |
56,0 m/s |
App. 2.5 |
For more info: bertil@mvvf.net
Easton FatBoy
340 30 inch 8.3 gpi m=0,0243
kg
Vane QuikSpin plastic app. 100 mm
Wind speed 60 m/s
Arrow rotation 49 r/s
Drag force F=373 mN
Arrow speed loss a in m/s/s
a=F/m a=0,373/0,0252=14,8 m/s/s
If this arrow is shot with an initial velocity of 60
m/s,
it will be slowed down to 45,2 m/s after 1s and app. 51 m.
Easton FatBoy
340 30 inch 8.3 gpi m=0,0243
kg
Vane normal plastic app. 100 mm
Wind speed 60 m/s
Arrow rotation 11 r/s
Drag force F=334 mN
Arrow speed loss a in m/s/s
a=F/m a=0,334/0,0243=13,7 m/s/s
If this arrow is shot with an initial velocity of 60
m/s,
it will be slowed down to 46,3 m/s after 1 s and app. 52 m.
The target is at the same level, and the calculations are
simplified, (the drag is supposed to be independent of
velocity from 60 to 45 m/s and the drag effect of fish-
tailing is ignored).