Flying Technique Question of the Day

Ehm, this is a gliding newsgroup, so my answer referred to glider landings,
not fuel-to-noise converters.

--
Bert Willing

ASW20 "TW"


"Andreas Maurer" a écrit dans le message de
...
On Mon, 1 Sep 2003 18:24:31 +0200, "Bert Willing"
wrote:

That's correct, although what you described as a forward slip is referred
to
in (at least Continental) Europe as side slip, and what you call side
slip
is NEVER done at all.

.. at least in gliders.

Corrections for crosswind are done by a crab angle. Darwin takes care of
those who can't re-align properly during round-out and flare.

.. at least he takes care of their landing gear, prop, engine, and
pride.





Bye
Andreas

tango4 wrote:

So my understanding is that an American forward slip is the same as a
sideslip anywhere else in the world whilst an American sideslip is a shallow
rest-of-the-world sideslip

Not where I live. Here, I've never heard the term sideslip, we just do
slips. A slip is a slip is a slip, period. You can use it for different
purposes, although using it on final for crosswind corrections with,
say, an ASH 25 is considered a bad idea here.

Stefan

Slip is just short for sideslip as far as I'm concerned. One and the same.

Ian


"Stefan" "stefan"@mus. INVALID .ch wrote in message
...
tango4 wrote:

So my understanding is that an American forward slip is the same as a
sideslip anywhere else in the world whilst an American sideslip is a
shallow
rest-of-the-world sideslip

Not where I live. Here, I've never heard the term sideslip, we just do
slips. A slip is a slip is a slip, period. You can use it for different
purposes, although using it on final for crosswind corrections with,
say, an ASH 25 is considered a bad idea here.

Stefan

OK here is the answer to one of my favorite Flight Review Questions:

What is the difference between a side slip and a forward slip?

1. A side slip, is a slip where the aircraft is pointed the direction
you are going and the wings a tipped to compensate for a cross wind or
off center positioning from the runway center line. Side Slips are
used almost exclusevly for cross wind correction and alignment with
the runway.

2. A Forward Slip, is a slip where the aircraft continues on a path
toward the runway, however the aircraft is not generally pointed
anywere near the direction you are going. The wings are tipped to
compensate for the slip and any crosswind and maintain the aircrafts
path toward the runway. They are typically more agressive than a side
slip and are used primarly to disipate energy (Alitude or Airspeed)

Generally a you should only side slip or forward slip during landings,
most any other time you are simply slipping or more correctly flying
uncoordinated.

Brian
CFIIG/ASEL



Stefan "stefan"@mus. INVALID .ch wrote in message ...
tango4 wrote:

So my understanding is that an American forward slip is the same as a
sideslip anywhere else in the world whilst an American sideslip is a shallow
rest-of-the-world sideslip

Not where I live. Here, I've never heard the term sideslip, we just do
slips. A slip is a slip is a slip, period. You can use it for different
purposes, although using it on final for crosswind corrections with,
say, an ASH 25 is considered a bad idea here.

Stefan

Nyal Williams wrote:

"tango4" wrote in message ...
Forward slip ....

Whasat?

I know what a sideslip is but I've never understood this ( American? ) term.
Can't seem to find it in the BGA instructors manual either.

Ian

Don't bother with it; the glider doesn't know the difference. It is a
US mental exercise based on where you are trying to go. A pilot in
the back seat can't tell which one it is until he sees where you end
up.

Most of the discussion is correct, the distinction in terminology and is based on
the intent of the pilot.
Having to fly over here in the US, and being asked to do them on biannual flight reviews, I remember
it this way:

A side-slip is when you're flying (ie pointing) forward.
A forward-slip is when you're flying sideways.

Simple and logical ..... NOT.

The weather more than makes up for these minor inconveniences.

Chris

1. Yes!
2. 'cause yur landin'!

Cheers!

Jim Vincent wrote in article
...
Tailored towards the newbies:

On final, assuming there is a crosswind and you need to forward or side
slip,
does it make a difference which wing is held down, and why?


Jim Vincent
CFIG
N483SZ

Shirley wrote in message
...
wrote:

I hate to admit it, but I don't know the
difference between a side slip and a
forward slip. Please walk me through
exactly what I'm doing with the stick and
rudder on each one and where the nose
is pointed.

See Chapter 14 of the SSA Soaring Flight Manual (pp 14-8 - 14-10) -- the
two
maneuvers are fully detailed there, and there is also an excellent figure
that
illustrates the difference. I am NOT a CFIG, so I urge you to read the
aforementioned paragraphs and/or talk to a CFIG. But VERY briefly, my
understanding is as follows:

Seems to me. in English, this is what we call laying off the drift.

Side Slip (for crosswind control): Lower upwind wing, use enough opposite
rudder to keep glider from banking in direction of the wing. Longitudinal
axis
is parallel to the straight flight path.

Seems to me. in English, this is what we call laying off the drift.

Forward Slip (steepens angle of descent, used to lose excess altitude):
Lower
wing, use oppposite rudder to point nose away from the glide path exposing
the
front side of the glider to the oncoming air to create more drag (careful
to
maintain not increase airspeed and remember ASI will not be correct). Slip
*toward* crosswind if one is present. Longitudinal axis is NOT parallel to
the
flight path, but the flight path is straight. Resume normal flight, of
course,
before landing (I'm sure you know that, just CMA!!)!

Whereas this is known as the side slip.

Sounds as if the Americans are trying to make something
simple.....complicated


--Shirley

I find it interesting, and a little surprising, that the SSA manual does
not mention the need to reduce the amount of nose down when slipping, to
avoid an unwanted speed increase. The only clue is for one form of slip
only , which includes the suggestion "(careful to maintain not
increase airspeed and remember ASI will not be correct)".

As the two manouvres (two as perceived in the USA, only one in the UK
albeit with more than one scenario when one might deploy it) are
aerodynamically the same, they need the same care over speed, unless you
are happy to arrive with a HELP - High Energy Landing Problem.

They both, not just "forward slip", need correction to normal flight
before getting close to the ground, unless either flying a very high
wing glider or risking a spectacular end to the flight as the lower
wingtip digs in while the rest is still airborne.

Chris N.

On Mon, 1 Sep 2003 12:57:47 UTC, (JJ Sinclair) wrote:

: I hate to admit it, but I don't know the difference between a side slip and a
: forward slip.

It seems to be a distinction made only in some parts of the world, and
as far as I can tell depend more on where your head is pointing than
what the glider is doing, aerodynamically.

Ian
--

Jim Vincent wrote in article
...
Tailored towards the newbies:

On final, assuming there is a crosswind and you need to forward or side
slip,
does it make a difference which wing is held down, and why?


Jim Vincent
CFIG
N483SZ



Since you're a CFIG, I' assuming that you already have an answer to
the question, and that you were curious as to what the "newbies" would
answer ?

As the thread seems to have wandered away from your original question,
what is *your* answer to it ?

I'm a newbie glider pilot(3 weeks), and a fairly-newbie power-pilot (3
years), and it wasn't till I started gliding that I was told to keep
the "into wind" wing down.

Now the policy at the glider club I am flying at is to change the
direction of the circuit so that the base leg is into the wind. This
means that after turning final, if I need to slip I have to lower the
opposite wing to the one that is already down for the turn to final.
I never did that, as I found it too much workload, and illogical,
especially if I also found that I might need a "slipping turn".

Mike