At 12:31 03 February 2015, Don Johnstone wrote:
At 23:52 02 February 2015, HGXC wrote:
On Monday, February 2, 2015 at 3:00:05 PM UTC-5, Don
Johnstone wrote:
At 15:26 01 February 2015, wrote:
Hi folks, I'm in the process of installing new connecting rods
in my
Ventus=3D
B would like to know what everyone is using if any for the
slide lube
wher=3D
e those connecting rods like to ride. The material that the
slide is
mad=
e
o=3D
ut of seems to be impervious to wear so that's good but the
rods are
wearin=3D
g is there any thing you have found that will not collect dust
an
still
gi=3D
ve good wear resistance?

CH
=20
If Schempp Hirth thought that the rods needed a lubricate I
am sur
they
would have mentioned it in the service manual or instructions
for
replaci=
ng
the rods. I do not believe that they forgot and it is perfectly
clear
tha=
t
they intended that the rods should be as they originally
assemble
them,
lubricant free. Does that give you a clue at all on what should
b
used?

I own a Ventus and I have mine lubed at the annual, I have the
opening
in
=
the wing like Dick Johnson suggested. If Schempp Hirth didn't
want thi
to
=
be lubed then they would have used a different bushing when
they made the
g=
lider. All gliders have short comings. The glider has been flown
over 30
ye=
ars and like all popular gliders over time, pilots find ways o
addressing
=
imperfections and every glider has some.

Dennis

Why is it that some glider pilots feel they know better that the
qualifie
engineers and designers who design and build the machines they
fly. Mayb
using an unapproved lubricant on material that you do not know th
composition of, which might be damaged is unwise but drilling a
hole in th
structure to do it, that is stupidity of the highest order, such is life
suppose. I doubt that the "opening" made was properly sealed to
unsure tha
moisture could not damage the GRP structure which is
hygroscopic, m
advice. Do NOT purchase a glider owned by these people.
It is true pilots have a long history of finding incorrect ways o
addressing imperfections, proves the old maxim I suppose, if flying
wa
difficult engineers would do it.

I recall corresponding with a pilot who wanted to move forward the
C of G of his GRP glider and found that there was some lead
attached to the leading edge of the rudder. He didn't know why it
was there so he removed it. Next he planned to cut holes in the
rudder and cover them with fabric. I told him that it was the mass
balance and warned him about flutter but he replied that it was OK
as the glider was "Experimental".

John Galloway