why aircraft blades injured when a bird strike on it?

Question

i mean blades are big & rotate with high speed

Answer 1

exactly... blades rotate with high speed
we are talking abt relative velocity
imagine u r standing still and a small pebble comes and hits u at a high speed
it will hurt (u bet)
the same happens here
the relative velocity between the two is high
and the size of the bird doesnt matter

Answer 2

The mass and velosity of a bird may be comparatively less. But for the impact of the blade of the aeroplane on the bird or vice versa, the mass as well as relative speed matters. Relative speed of the bird is the sum of the velocities of both aeroplane and the bird. The product of the relative speed and mass of the bird, even though comparatively less, is large enough to damage the blade.And the impact of the blade on the bird, ofcourse smashes it.

Answer 3

depends on what blades and aircraft. jet engines are ceramic blades of high strength, but brittle. little birdes just add a flame colour to exhaust but a goose might shatter some blades and warp it way out and the rotational speeds are not fun to deal with.

kinetic energy at those rotational speeds are a bi-otch.

Answer 4

imagine a 5 pound bird flying at you at 2mph and an aircraft cruising at around 600mph. The blades are not strong enough to withstand the impact, causing it to be twisted out of shape. When one leaf of blade is out of shape, it is easy for it to get caught with the engine shielding causing other blade to spin into each other and self destructing the whole engine when the bits and pieces flow through the combustion chamber.

Answer 5

The blades are spinning at a very hight speed so that any distrubance will cause them to change their shape. When a bird hits them, the will crack because of the enormous extra load and because of their construction (they're very strong but quite brittle)

Answer 6

because at high velocities, even small particle can change the momentum drastically, which leads to deformation.