Name the sound

[haz]

From the right side "airintake", at start up (cold engine) there is a fan-like sound that can be heard, almost like the same sound you hear when a air plane makes at take-off (almost as if it is building thrust). There is nothing wrong with the sound, I am just curious as to what makes the sound. The mechanical part of it.. after 10 mins it is completely gone.

[BTfd2e93]

vacuum pump.

its the impeller spinning that makes the sound. if u listen closely. ... u will hear it spool down ... after around 1-2 mins.... after startup.

[Timco]

Sec air pump? Only at startup?

[haz]

Originally Posted by Timco

Sec air pump? Only at startup?

yes

Originally Posted by BTfd2e93

vacuum pump.

its the impeller spinning that makes the sound. if u listen closely. ... u will hear it spool down ... after around 1-2 mins.... after startup.

Thank you

[TeamOxford]

Originally Posted by haz

From the right side "air intake", at start up (cold engine) there is a fan-like sound that can be heard..........I am just curious as to what makes the sound.

I always thought it was the sound of the landing gear retracting, no?

Just sayin'...............

TO

[haz]

Originally Posted by TeamOxford

I always thought it was the sound of the landing gear retracting, no?

Just sayin'...............

TO

hat tip to you my good sir

[ilikeching]

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