Slipping in Turns

Because the turn you are creating by banking into the
thermal is soooooooo much bigger than the tiny turning
effect of the slip and, as has been said before, you
are slipping towards the centre of the thermal, which
has to be good. (Actually, you are slipping towards
a point that is always a little in front of the core,
but -hey- I can't fly that accurately either!)
Rob
At 10:42 26 November 2003, Js wrote:
What about this: when I press another pedal slowly
down an keep it there,
holding wings level, plane begins to fly round a point
at the noses and
pressed pedals side. Thread shows I am skidding to
opposite side. I could
allmost thermal like this, holding wings in level.

So why shoud I slip into thermal, becouse skidding
out of it turns the plane
into the direction of thermals core.

Complicated...

js


'Bert Willing' wrote in
message ...
I'm anyway too stupid to fly coordinated, so I choose
to better slip into
the thermal than skidding out of it :-)

--
Bert Willing

Just by talking to several world class glider pilots (including the
current world champion) in Leszno this summer and based on the
presentation given by Prof.M.D.Maughmer (The design and testing of a
winglet airfoil for low-speed aircraft)it turns out that gliders
equipped with winglets do not favor flying in a slip. In other cases
(gliders with no winglets), especially the open class gliders do favor
thermaling with a slight slip. Again, this is based on talking to and
observing those who know much more than an average glider pilot.
Milan Air
Robert John wrote in message ...
Because the turn you are creating by banking into the
thermal is soooooooo much bigger than the tiny turning
effect of the slip and, as has been said before, you
are slipping towards the centre of the thermal, which
has to be good. (Actually, you are slipping towards
a point that is always a little in front of the core,
but -hey- I can't fly that accurately either!)
Rob
At 10:42 26 November 2003, Js wrote:
What about this: when I press another pedal slowly
down an keep it there,
holding wings level, plane begins to fly round a point
at the noses and
pressed pedals side. Thread shows I am skidding to
opposite side. I could
allmost thermal like this, holding wings in level.

So why shoud I slip into thermal, becouse skidding
out of it turns the plane
into the direction of thermals core.

Complicated...

js


'Bert Willing' wrote in
message ...
I'm anyway too stupid to fly coordinated, so I choose
to better slip into
the thermal than skidding out of it :-)

--
Bert Willing

I see it all the time in the L-23. The string in front
shows a slight slip while the one for the back seat
shows a coordinated turn.


At 23:42 25 November 2003, Chris Ocallaghan wrote:
Jim,

There was a thread on this subject a year or two ago,
you might want
to search the archives.

The simple aerodynamic answer goes like this: The circle
is traced by
the glider's center of gravity, which means that your
nose extends
beyond the edge of the circle. To visualize, draw a
circle, then draw
a line tangent to it. You can see that the nose and
tail of your
fuselage transcribe larger circles. A yaw string forward
of the cg
will show a slight slip for a coordinated turn (that
is, coordinated
at the cg, or wing). If your yaw string is straight,
then you are, in
fact, slightly skidding the turn. This effect also
exists at the tail,
requiring you to hold a little bit of rudder into the
turn (but not so
much that you straighten out the yaw string). Obviously,
the longer
the arm, the greater the effect.

I've tried to observe the difference between the front
and rear yaw
strings on a G103, but the canopy edge generates too
much turbulence
to mark any clear difference.

For practical purposes, the slip is small (5 to 10
degrees).

Jim Hendrix wrote:

I'm wondering if many people hold a mild slip in turns and why they do it.
Please reply to this post if you do this and give your reason(s).

I do.

Reason : it's easier... and why shouldn't I ?

Symmetrical flight is optimal in straight flight, not in turn. Even with
no slip nor skid (at the wings), a turn flight is NOT symmetrical (it is
either to the right, either to the left, never both !). The inner wing
goes slower than the outerwing, dihedral effect with slip helps
couteracting this dissymetry.

How much slip is optimal is another question, but SOME slip is
definitely optimal.

--
Denis
Private replies: remove "moncourrielest" from my e-mail address
Pour me répondre utiliser l'adresse courriel figurant après
moncourrielest" dans mon adresse courriel...

you plonkers! the only reason slipping into the turn works is,the glider
airspeed is controlled a lot better due to the fact the fuz is still trying to
climb, if you watch the asi you can see a closer smoother air speed thus stopping
the pilot from making to many corrections and chasing the asi.Moffit touched
on it in the 70s

noitall

I can't (plonk) seem to get (plonk) my arms (plonk) around this one.
Sadly, I need to see it discussed to its bitter end.

Could someone please elucidate... or translate. All I've got so far is
that if I slip my turns, my nervous tick won't be so grossly echoed by
the asi needle.

Young Pratt wrote in message ...
you plonkers! the only reason slipping into the turn works is,the glider
airspeed is controlled a lot better due to the fact the fuz is still trying to
climb, if you watch the asi you can see a closer smoother air speed thus stopping
the pilot from making to many corrections and chasing the asi.Moffit touched
on it in the 70s

noitall