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Feather fletching – these are shield cut with barred red hen feathers and a solid white cock.
Feather fletching – these are shield cut with barred red hen feathers and a solid white cock.
Plastic fletching (also known as vanes) – this example is parabolic cut with pink hen vanes (the ones put oblique to the bow when nocked on the string
Plastic fletching (also known as vanes) – this example is parabolic cut with pink hen vanes (the ones put oblique to the bow when nocked on the string) and a green cock (the one – or ones, with even-numbered vanes – put perpendicular to it).
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Fish get thrust moving vertical tail fins from side to side.
Fish get thrust moving vertical tail fins from side to side.
Cetaceans get thrust moving horizontal tail fins up and down.
Cetaceans get thrust moving horizontal tail fins up and down.
Stingrays get thrust from large pectoral fins.
Stingrays get thrust from large pectoral fins.
Ship propeller
Ship propeller