Jetfins reglables.jpg
Antennarius striatus.jpg
Frog fish use their pectoral and pelvic fins to walk along the ocean bottom.
September 2017
Dasyatis thetidis.jpg
left
Holacanthus ciliaris 1.jpg
Conventional "planar" fins on a RIM-7 Sea Sparrow missile
Cavitation damage is evident on this propeller.
A rudder corrects yaw
horizontal
thin component or appendage attached to a larger body or structure
Aileron roll.gif
algemeen
Asymmetric stabilizing fins impart spin to this Soviet artillery rocket
yes
Other uses
AquaPenguin – Festo, YouTube
Robotic Shark YouTube
center
Static tail fins are used as stabilizers
Robot Fish YouTube
In recent years, car fins have evolved into highly functional spoilers and wings.
Oil heaters convect with fins
Fish get thrust moving vertical tail fins from side to side.
vertical
In some Asian countries shark fins are a culinary delicacy.
Yacht keel.svg
– Aristotle, De incessu animalium
Motorbikes use fins to cool the engine.
Charlie the catfish – CIA video
Ship propeller
Swim fins add thrust to the kicks of a human swimmer.
right
Fernando Alonso won 2012 Malaysian GP.jpg
Aristotle recognised the distinction between analogous and homologous structures, and made the following prophetic comparison: "Birds in a way resemble fishes. For birds have their wings in the upper part of their bodies and fishes have two fins in the front part of their bodies. Birds have feet on their underpart and most fishes have a second pair of fins in their under-part and near their front fins."
The dorsal fin of a white shark contain dermal fibers that work "like riggings that stabilize a ship's mast", and stiffen dynamically as the shark swims faster to control roll and yaw.
During courtship, the female cichlid, Pelvicachromis taeniatus, displays her visually arresting purple pelvic fin.
componente delgado o apéndice unido a un cuerpo o estructura más grande
Pelvicachromis taeniatus.jpg
Sailfin flyingfish.jpg
Rescue surfboard, Killahoey Strand - geograph.org.uk - 901180.jpg
Robotic fish to monitor pollution in harbours YouTube
Moving fins can provide thrust
The rudder controls yaw
Surfboard fins allow surfers to maneuver their boards.
InternetArchiveBot
Aileron yaw.gif
Sailfish raise their dorsal fin to cool down or to herd schooling fish.
Aileron pitch.gif
tunn komponent eller bihang fäst till en större kropp eller struktur av aerodynamiska skäl
AiraCuda – Festo, YouTube
Flying fish use enlarged pectoral fins to glide above the surface of the water.
Spinosaurus may have used its dorsal fin as a courtship display.
Evolution of the Surfboard Fin – YouTube
Shark finning icon.jpg
AquaJelly – Festo, YouTube
Fins can regulate temperature
Airplane propeller
Fish, boats and airplanes need control of three degrees of rotational freedom.
Barb gonio 080525 9610 ltn Cf.jpg
Elevators control pitch
Thunnus obesus diagram cropped.GIF
Compressor fins
AquaRay – Festo, YouTube
White shark .jpg
Spinosaurus 2020 reconstruction.jpg
Oil Heater 5293.jpg
Robotic Fish YouTube
Specialised fins are used to control motion
Yacht keel steer.svg
Many reef fish have pectoral and pelvic fins optimised for flattened bodies.
Stingrays get thrust from large pectoral fins.
поверхня для керування польотом
Southern right whale caudal fin-2 no sky.JPG
Ornamentation
Fletching on an arrow
Ailerons control roll
A fin keel limits roll and sideways drift
Ship stabilising fins reduce roll
Cavitation Propeller Damage.JPG
Cetaceans get thrust moving horizontal tail fins up and down.
Stern of Bro Elisabeth 2.jpg
زعانف
Ailette
Sirip
Fin