Engine Fans

[cessna2351]

How come in most Boeing jets (others?) there are those little white spirals in the center of each fan. Are they just there because they look real cool when you look at them spinning or do they serve another purpose?

Mike McM

 

[RiddlePilot]

My guess is that it's to quickly tell whether or not the blades are spinning.

 

[flyhigh]

[ QUOTE ]
My guess is that it's to quickly tell whether or not the blades are spinning.

[/ QUOTE ] That's what I would also guess

 

[JAM]

[ QUOTE ]
My guess is that it's to quickly tell whether or not the blades are spinning.

[/ QUOTE ]

Actually, they are there to calibrate how fast the fan is spinning. A trained mechanic can see the rpms by counting the number of revolutions of the "spinner" in a minute at idle and check that against factory limitations.

/ubbthreads/images/graemlins/spin2.gif /ubbthreads/images/graemlins/spin2.gif /ubbthreads/images/graemlins/spin2.gif

 

[jtrain609]

I always thought it was designed to freak out birds so that they wouldn't go near the engines.

 

[TrinidadGT20]

I agree with John. I've read a few times that the spinners are to scare away birds.

 

[sorrygottarunway]

or scare away "look ma" passengers