Question

bonjour
riddle time
I have four wings, but cannot fly, I never laugh and never cry; On the same spot I'm always found, toiling away with little sound. What am I?

Answer 1

$<marquee> a windmill$

Answer 2

ANSWER:

Windmill  

EXPLANATION:

    A windmill is a structure which transforms the wind energy into rotational energy using vanes called blades/sails. Wind mills function on a simple principle. The wind energy turns 2 or 3 "propeller-like blades" around a rotor. The "rotor is connected" to the "main shaft, which spins" a generator to "create electricity".  Depending on the condition of the wind, the blades rotates at rates between 10-20 revolutions/minute.

  Considering the blades' length with avg wind speeds of 13-15 miles/hour, the tips are travelling at 120 mph. At maximum wind speeds, the tips of the blade spin at a speed of 180 miles/hour. The energy generated by windmills is used in several ways. These comprise grinding spices or grain, sawing wood, or pumping water. Modern wind mills are used to "generate electricity".