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-   -   forward slip (https://www.pprune.org/tech-log/419263-forward-slip.html)

leftwing 25th Jun 2010 17:24

forward slip
 
Hi, done some research and have not found an answer suitable. I am aware that the term forward slip means to operate the rudder and ailerons in different directions to overcome crosswinds, how does this help to overcome the crosswinds, this is something I have never tried in my career, any help?

mcgoo 25th Jun 2010 17:28

What is your career? (would be interesting to compare IP address with bumpyflight)

leftwing 25th Jun 2010 17:29

I used to be a dash 8 pilot before retiring last year, bumpy?

ImbracableCrunk 25th Jun 2010 18:16

Dash Ocho? So was Bumpy! And A321, of course. But not the deep and dark realm of the A320. . .

If you're not Bumpy, then welcome to the party. I hope you find your answer.

If you are Bumpy, we missed you so.

NOLAND3 25th Jun 2010 18:17

Your a retired Dash 8 pilot, and your asking this question? :ugh:

Pugilistic Animus 25th Jun 2010 19:18

have a look at the airplane flying handbook

the Dash-8 can't make FL 390

:)

GarageYears 25th Jun 2010 19:27

Why does bumpy insist on using lower-case for the dash 8...? :ugh:

-GY

P.S. Amusingly the service ceiling for the A321 is... 39K

BarbiesBoyfriend 25th Jun 2010 19:42

I thought a fwd slip was for losing height quickly.

Crossing controls in a x-wind is a different thing.

janrein 25th Jun 2010 19:52

aligning non-alignments
 
crossing controls results in non-alignment of heading and tracking

cross wind results in non-alignment of heading and tracking

crossing controls (adequately) in a cross wind landing results in alignment of heading and tracking

that is how it helps

leftwing 25th Jun 2010 19:57

thanks for the information janrein

captainsmiffy 25th Jun 2010 20:03

Barbies boyfriend, maybe it was to 'lose' some height?! Not loose it!

BTW, have we flown together - spent many years in BRS on the junglejet!

BarbiesBoyfriend 25th Jun 2010 20:17

Thanks you great ginger lump! I already edited it before I saw yer post.

You should try a big sideslip in the crash-8, I think it would do it nicely as it has a big 'ol rudder. Not such a good plan on the Barbie.

You doin' ok now you're a big ol' captain?;):ok:

Edit: Oops CaptainSmiffy. Have I misidentified you? Just noted your unicycle comment in your profile so, if that was you with the card tricks, then I remember you!

I was your FO I think, not the other way 'round.:)

Chesty Morgan 25th Jun 2010 20:23

Lefty/Bumpy,

How did you used to land in a crosswind on the Dash then?

parabellum 25th Jun 2010 21:42

I always thought that a forward slip fielded around the fourth slip position?

I'm confused now, where does a side slip field?

john_tullamarine 26th Jun 2010 02:18

One can deliberately cause an aircraft to sideslip by flying crossed controls.

Sometimes one uses such sideslip while endeavouring to maintain a track, eg, during late final to lose an extra bit of height. For this specific use of sideslip, the Americans refer to "forward slip" while everyone else just calls it sideslip.

Done to death in earlier threads if you like to run a search.

stubby1 26th Jun 2010 06:08

If forward slip is side-slip then let me attempt to answer ur Q.

Assuming winds from the left on approach' the nose is cocked to the left to track in.

At flare you give right rudder to straighten. The rudder produces force to the left on the tail.
This force besides acting about the vertical (normal) axis also gives translational force to the left. this translational move counteracts the wind from the left momentarily.

However the swing of the left wing may increase the lift on it & raise the left wing. And also if the float has been long the aircraft will start to drift to the right, so again you will require to dip your left wing

In the end you have applied right rudder & left dip.

hope have been of some help

Pugilistic Animus 26th Jun 2010 09:46

Airplane Flying Handbook
Seriously, it's a good read if you wanna buy a copy it's only about $15 if that:)

Air Tourer 26th Jun 2010 10:21

crossed controls
 
Trick question; when does crossed controls give a balanced turn?

A320rider 26th Jun 2010 11:10

my god, I can not belive the level of EU pilots here .you should really go back to basic. who taught you to fly a plane?

balanced turn is when the ball is centered...if you Xcontrol you are not in a balanced turn.

next question for you: difference between forward slip and slip?

slip is when you X control but flight straight.

forward slip is when you X control with excess of bank(you skid when excess of rudder), and you drift aways from your track.(used usually to lose altitude)


what's the right technique to enter a forward slip?

first bank the plane over 30 degree
second; apply rudder in opposite direction

how to get out?:

release pressure on rudder
level off your wing


if you can not so this, I suggest you to go with a flight instructor, so he can show you how to do a f. slip.

ImbracableCrunk 26th Jun 2010 14:04

And the troll takes more hostages. . .

:ugh:


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