SZD-55 aileron play

My SZD-55 (built 1990) had developed play in one aileron over the years. A powerpoint presentation with the relevant Flight Manual pages (allowable play), drawing of aileron system (Tech Svc Manual), and additional drawings and part numbers required to effect the fix, including the cause, and pictures of the fix, are in the files section of the SZD-55 Yahoo! Group. The fix - brass bushing replacement - is not expensive (32 EUR/pair of bushings), and was completed in an hour during my recent annual inspection (with the ppt, probably a half hour, with basic tools and a couple of friends). If your 55 has aileron play/slop, this might be your fix.
To join the group: . You have to have a 55.
I looked at other SZD products (Junior, Puchacz), and their aileron drives are different, so this wouldn't apply to them - probably the thinner airfoil on the 55 drove the design.

Dan
2D

Do you know about the SZD-59 aileron drive?

On Wednesday, October 19, 2016 at 5:14:42 PM UTC-4, wrote:
Do you know about the SZD-59 aileron drive?

Nope. If you e-mail me the picture of the aileron circuit (from parts manual) for the 59 I can say whether it is the same or not.

On Wednesday, October 19, 2016 at 6:57:43 PM UTC-4, Dan Daly wrote:
On Wednesday, October 19, 2016 at 5:14:42 PM UTC-4, wrote:
Do you know about the SZD-59 aileron drive?

Nope. If you e-mail me the picture of the aileron circuit (from parts manual) for the 59 I can say whether it is the same or not.

It was pointed out it would have been handy to talk about hours. My glider has 919 hrs on it, and the aileron drive bushing is in a wing that was replaced about 240 hours ago (just prior to me buying it as a factory refurbished glider).

There are 3 55's at my field; one has just a little play, another about half book tolerance, and mine was just under the TSM max (plus/minus 3mm each way, measured at the stick with aileron held steady); I was first up for the fix.

Dan

At 00:17 20 October 2016, Dan Daly wrote:
On Wednesday, October 19, 2016 at 6:57:43 PM UTC-4, Dan Daly
wrote:
On Wednesday, October 19, 2016 at 5:14:42 PM UTC-4,

wrote:
Do you know about the SZD-59 aileron drive?

Nope. If you e-mail me the picture of the aileron circuit (from
parts
manual) for the 59 I can say whether it is the same or not.

It was pointed out it would have been handy to talk about hours.
My glider
has 919 hrs on it, and the aileron drive bushing is in a wing that
was
replaced about 240 hours ago (just prior to me buying it as a
factory
refurbished glider).

There are 3 55's at my field; one has just a little play, another
about
half book tolerance, and mine was just under the TSM max
(plus/minus 3mm
each way, measured at the stick with aileron held steady); I was
first up
for the fix.

Dan

I have no experience of the SZD 55 or the SZD 59 but I have
experienced a long term (slowly worsening) problem of aileron free
play on the SZD 51 Junior. In case there is a family similarity here
is my experience.

In the case of the Junior the wear occurs in the bushes fitted to the
hinge brackets on the wing, particularly in the inboard bracket
which is adjacent to the operating push rod. The aileron hinge
pins also wear but far less. Replacing the "top hat" bush in the
inboard bracket alone produces a dramatic reduction in free play!
You may need to ream the Allstar supplied bushes after you have
installed them.

Jim Thomson

Hello,
The same problem is in all Jantar Std family.
The second problem with Jantar Std and 55 aileron is hard deflection. Clean and lubricate bearings in all ailerons hinge - much better.
The specific problem with SZD 55 ailerons is jamming at some position.
In the inner part of the wing you will find aileron drive mechanism consisting of a stone and guide. Never lubricate this part of mechanism!