Who's Online

We have 1256 guests online

Live Traffic Feed

Life in the Skies

'A Local Bestseller!'

What Tony says
(See here)
and Book Launch video here
 
What others say

Les Posen
(See
here)

Yvonne Lee
(See
here)

Louisa Lim & Allan Koay
(See
here)

Aireen Omar, Asran & Bo Lingam
(See
here)

38 Readers' Comments
(See here)

Get an autographed copy here

AMAZON.COM  -  To Order, please Click here 

(eBook) Kindle edition - please Click here

Latest Comment

A successful SIA Cad
the deadline i guess it's the end of this februry,

Singapore Airlines P
Hello captain Lim , I am Ray . I would like

What are the eyesigh
sir i have -0.25 in my right eye and 0.75 in left

Spontaneous Pneumoth
I'm not a doctor or anything, @chinmay, so I can't

What are the cruisin
The idea that the earth is spinning is plain bulls

Singapore Airlines C
Hello Captain Lim, I am an Indian citizen, Engine

Spontaneous Pneumoth
my grandmother is 70 yrs. old also sugar patient.

Does a jet aircraft
From what I understood Flat earthers are just uned

A Boeing 777 can’t f
Aircraft airspeed systems measure how fast the air

When and how does th
I don’t know

Paperback Version

 For Local Availability - Check Here
 
Home > Air Travel > Plane trembled then dropped!
Plane trembled then dropped!
Flying - Air Travel
Tuesday, 22 April 2014 13:52

Use of Spoilers

Hi Captain Lim,

I stumbled upon your site recently and I am very thankful for the service you're doing for the flying public.

Anyway, a few years ago, I was on a Cathay Pacific flight from Hong Kong to Rome. We were on (or near) the decent phase of the flight when the plane started to vibrate/tremble/shudder.

I can compare the feeling to a car engine that's having trouble starting or staying turned on.

Right after, the plane suddenly dropped to its left side for around two seconds.

This happened another time before we landed in Rome.

From what I remember, the weather outside was pretty fair, with a few clouds scattered about.

What do you think could be the cause of this?

Hope to hear from you soon!

Thanks!

Ven

Hi Ven,

What you felt during the flight was nothing unusual. The vibration/trembling/shuddering sensation during descent was probably the effect of the captain selecting the speed brakes (spoilers) on to increase the rate of descent as required by the ATC (air traffic controller) followed by some clear or wake turbulence

See a FAQ about the function of spoilers here.

The wing sudden drop to the left momentarily could be the effect of clear air turbulence or wake turbulence (see similar FAQ here).

All these phenomenon are quite common if you are a frequent flyer.


Detecting Clear Air Turbulence

Trackback(0)

TrackBack URI for this entry

Comments (0)

Subscribe to this comment's feed

Write comment

smaller | bigger

busy
 

Paperback Version

 For Local Availability - Check Here

Recommended By..


LIFE IN THE SKIES

'A Local Bestseller!'

Recommended by

Patrick Smith
Boston USA
(See
here)

Capt Meryl Getline
ex-United Airlines USA
(See
here)

Capt Doug Morris
Canadian Airlines
(See
here)

Capt  Robert J Boser
ex-United Airlines USA
(See
here)

38 Readers' Comments
(See here)

Get an autographed copy here

AMAZON.COM  -  To Order, please Click here 

(eBook) Kindle edition - please Click here

View Book Launch video here

Follow me

@CaptKHLim

Like What You Read?


If you like what you read, more stories are found in my book LIFE IN THE SKIES (Preview here) and you can purchase a copy here. To check for any latest updates or postings, you can follow my Twitter at @CaptKHLim or Facebook here

MH 370 Interviews

Click here to View

10 Most Popular Posts



Disclaimer | Privacy
2004 - 2011 © AskCaptainLim.com | Site Concept by eQuilec.com