parallelogram stick

Sorry guys, can't find the answer via search, but what is a parallelogram stick?

On Jan 9, 6:07*pm, Timinnc wrote:
Sorry guys, can't find the answer via search, but what is a
parallelogram stick?

--
Timinnc

It is where the stick just moves backwards and forwards on a
parallelogram mechanism, as opposed to being bottom hinged. It's
supposed to stop pilots putting in unintentional movements due to g
loadings.

Derek C

Timinc,

I have pictures of a parallelogram stick assembly if you'd like to see
them.

Contact me

c i r r u s c f i ( a t ) g m a i l . c o m

On Jan 9, 1:07*pm, Timinnc wrote:
Sorry guys, can't find the answer via search, but what is a
parallelogram stick?

--
Timinnc

Tim,

the elevator input is given by moving the stick back and forth on a
straight line rather than rotating the stick around one single hinge
point. To make matters worth, the commonly used sticks are typically
off-set from the hinge point towards the rear. High vertical
accelration can induce an unwanted elevator input. As Derek pointed
out, pilot induced oscillations due to vertical accelerations is not
an issue with these sticks. The Glassfluegel H303, H304 (incl. the CZ)
Mosquito and maybe other types have this type of stick.

Uli

On Jan 9, 2:54*pm, GM wrote:
On Jan 9, 1:07*pm, Timinnc wrote:

Sorry guys, can't find the answer via search, but what is a
parallelogram stick?

--
Timinnc

Tim,

the elevator input is given by moving the stick back and forth on a
straight line rather than rotating the stick around one single hinge
point. To make matters worth, the commonly used sticks are typically
off-set from the hinge point towards the rear. High vertical
accelration can induce an unwanted elevator input. As Derek pointed
out, pilot induced oscillations due to vertical accelerations is not
an issue with these sticks. The Glassfluegel H303, H304 (incl. the CZ)
Mosquito and maybe other types have this type of stick.

Uli

Almost all, if not all, of the DG series gliders have them.

On Sun, 09 Jan 2011 16:36:39 -0800, brianDG303 wrote:

On Jan 9, 2:54Â*pm, GM wrote:
On Jan 9, 1:07Â*pm, Timinnc wrote:

Sorry guys, can't find the answer via search, but what is a
parallelogram stick?

--
Timinnc

Tim,

the elevator input is given by moving the stick back and forth on a
straight line rather than rotating the stick around one single hinge
point. To make matters worth, the commonly used sticks are typically
off-set from the hinge point towards the rear. High vertical
accelration can induce an unwanted elevator input. As Derek pointed
out, pilot induced oscillations due to vertical accelerations is not an
issue with these sticks. The Glassfluegel H303, H304 (incl. the CZ)
Mosquito and maybe other types have this type of stick.

Uli

Almost all, if not all, of the DG series gliders have them.

DG 300 for sure, but not, IIRC the DG1000 and I seem to remember a
'normal' stick in the DG-500.


--
martin@ | Martin Gregorie
gregorie. | Essex, UK
org |

On Jan 9, 5:07*pm, Martin Gregorie
wrote:
On Sun, 09 Jan 2011 16:36:39 -0800, brianDG303 wrote:
On Jan 9, 2:54*pm, GM wrote:
On Jan 9, 1:07*pm, Timinnc wrote:

Sorry guys, can't find the answer via search, but what is a
parallelogram stick?

--
Timinnc

Tim,

the elevator input is given by moving the stick back and forth on a
straight line rather than rotating the stick around one single hinge
point. To make matters worth, the commonly used sticks are typically
off-set from the hinge point towards the rear. High vertical
accelration can induce an unwanted elevator input. As Derek pointed
out, pilot induced oscillations due to vertical accelerations is not an
issue with these sticks. The Glassfluegel H303, H304 (incl. the CZ)
Mosquito and maybe other types have this type of stick.

Uli

Almost all, if not all, of the DG series gliders have them.

DG 300 for sure, but not, IIRC the DG1000 and I seem to remember a
'normal' stick in the DG-500.

--
martin@ * | Martin Gregorie
gregorie. | Essex, UK
org * * * |

DG1000 is "normal"

Kestrel's also had the parallelogram stick.

took very little time to get used to and was quite comfortable to fly
with.

Al

On Jan 10, 7:07*am, Timinnc
wrote:
Sorry guys, can't find the answer via search, but what is a
parallelogram stick?

This is one, in a Club Libelle.

http://farm3.static.flickr.com/2746/...cb753ae4_b.jpg

Sorry if it's not too clear but I wasn't especially taking a photo of
the stick!

The stick grip is on a vertical shaft that comes down only as far as
the horizontal tube, to which it is rigidly welded. There are two
pivoting vertical tubes coming down from the middle and front of the
horizontal tube. The front one is obscured by the foam.

I was told that the parallelogram stick was to prevent PIO. Is that
the same as "unintentional movements due to g loadings"?

I have flow a DG-101G, DG-300 and DG-303 with a parallelogram stick.
I also fly an assortment of ships without a parallelogram stick.
Honestly, I don't know if I have noticed much of a difference.

However, the DG (with parallelogram) has a CG release while the others
(non-parallelogram) do not. Would a parallelogram stick help prevent
ballooning (with ugly consequences). If so, I am all for it.

- John

On Jan 10, 1:07*am, Martin Gregorie
wrote:
On Sun, 09 Jan 2011 16:36:39 -0800, brianDG303 wrote:
On Jan 9, 2:54*pm, GM wrote:
On Jan 9, 1:07*pm, Timinnc wrote:

Sorry guys, can't find the answer via search, but what is a
parallelogram stick?

--
Timinnc

Tim,

the elevator input is given by moving the stick back and forth on a
straight line rather than rotating the stick around one single hinge
point. To make matters worth, the commonly used sticks are typically
off-set from the hinge point towards the rear. High vertical
accelration can induce an unwanted elevator input. As Derek pointed
out, pilot induced oscillations due to vertical accelerations is not an
issue with these sticks. The Glassfluegel H303, H304 (incl. the CZ)
Mosquito and maybe other types have this type of stick.

Uli

Almost all, if not all, of the DG series gliders have them.

DG 300 for sure, but not, IIRC the DG1000 and I seem to remember a
'normal' stick in the DG-500.

--
martin@ * | Martin Gregorie
gregorie. | Essex, UK
org * * * |- Hide quoted text -

- Show quoted text -

We have a DG300 fitted with a parallelogram stick based at our site.
It seems to be more prone to pilot induced oscillations on aerotow
than most!

Derek C