MKII Yaw String "recall"

Could I get one with red on one side and green on the
other for left and right thermalling?

At 21:12 12 April 2007, Bumper wrote:
A whole lot less serious than fixing a wing spar .
. .



Free replacement offer:



If you purchased a MKII 'high tech' Yaw String during
the past two years it
may have an appearance defect. If so, you may obtain
a free replacement.
(This offer applies only to the MKII with 'pie shaped
base' - not the older
'baseball diamond' shape base.) Replacement offer expires
31 May '07. To get
your free replacement, remove the yaw string (instructions
for removal
below) and send the plastic portion of the turbulator
base, along with a
*stamped* self-addressed envelope, to:



John Morgan

194 Taylor Creek Rd.

Gardnerville, NV 89460



Please specify yarn color desired for your replacement,
as the MKII is now
available with original bright red, royal blue, mid-sky
blue, or yellow
yarn.



To remove your old MKII: Use a finger nail or knife
edge to lift up a corner
of the clear plastic base cover. Be careful not to
touch the canopy if you
use a knife edge. Grasp the base cover and slowly pull
straight off using
fingers or needle nose pliers. This will leave the
clear adhesive behind on
your canopy. Roll the adhesive layer off the canopy
using your thumb or
finger pressure. It will easily come cleanly off, leaving
no adhesive
residue.



The defect and cause: The MKII base is constructed
as a sandwich of clear
pressure sensitive adhesive with a clear plastic cover.
The natural wool
yarn is secured between these two layers, exiting via
a small hole in the
top surface. This assembly will have a slight bulge
in the adhesive caused
by the yarn. When installed, the adhesive normally
conforms enough to
flatten out this yarn bulge. However, over time two
small gaps or bubbles
may form on either side of the yarn. Pushing down on
the base temporarily
eliminates the bubbles but they'll be back. The bubbles
don't affect
performance of course, but people purchase the MKII
for its superior
performance *and* appearance.



The fix: A small flute or channel is now pressed into
the plastic base cover
prior to final assembly. This flute provides a place
for the yarn without
causing a bulge in the adhesive. The base remains transparent
when installed
and performance is otherwise exactly as in the previous
version.



If you don't already have a MKII, they are available
for $10 USD. I also
sell the Quiet Vent kit, $5 USD. The QV quiets the
air noise from the
Mecaplex flip-out side vent by 10 dba (measured in
ASH26E @ 60 knots with
all other vents closed) so you can get fresh air without
all the noise. The
QV is transparent when installed. To order either or
both, send payment
(check or cash) to above address along with SSAE. Your
satisfaction is
guaranteed.



All the best,



Bumper

Minden, NV

52ZZ

Nyal,

You know I'll go out of my way to please a customer. Do you mind if it has a
vertical fence to keep the two yarns from tangling? The fence will also
serve to keep the left side red yarn from migrating over to the right side
and causing an unrecoverable spin.

bumper

"Nyal Williams" wrote in message
...
Could I get one with red on one side and green on the
other for left and right thermalling?

At 21:12 12 April 2007, Bumper wrote:
A whole lot less serious than fixing a wing spar .
. .



Free replacement offer:



If you purchased a MKII 'high tech' Yaw String during
the past two years it
may have an appearance defect. If so, you may obtain
a free replacement.
(This offer applies only to the MKII with 'pie shaped
base' - not the older
'baseball diamond' shape base.) Replacement offer expires
31 May '07. To get
your free replacement, remove the yaw string (instructions
for removal
below) and send the plastic portion of the turbulator
base, along with a
*stamped* self-addressed envelope, to:



John Morgan

194 Taylor Creek Rd.

Gardnerville, NV 89460



Please specify yarn color desired for your replacement,
as the MKII is now
available with original bright red, royal blue, mid-sky
blue, or yellow
yarn.



To remove your old MKII: Use a finger nail or knife
edge to lift up a corner
of the clear plastic base cover. Be careful not to
touch the canopy if you
use a knife edge. Grasp the base cover and slowly pull
straight off using
fingers or needle nose pliers. This will leave the
clear adhesive behind on
your canopy. Roll the adhesive layer off the canopy
using your thumb or
finger pressure. It will easily come cleanly off, leaving
no adhesive
residue.



The defect and cause: The MKII base is constructed
as a sandwich of clear
pressure sensitive adhesive with a clear plastic cover.
The natural wool
yarn is secured between these two layers, exiting via
a small hole in the
top surface. This assembly will have a slight bulge
in the adhesive caused
by the yarn. When installed, the adhesive normally
conforms enough to
flatten out this yarn bulge. However, over time two
small gaps or bubbles
may form on either side of the yarn. Pushing down on
the base temporarily
eliminates the bubbles but they'll be back. The bubbles
don't affect
performance of course, but people purchase the MKII
for its superior
performance *and* appearance.



The fix: A small flute or channel is now pressed into
the plastic base cover
prior to final assembly. This flute provides a place
for the yarn without
causing a bulge in the adhesive. The base remains transparent
when installed
and performance is otherwise exactly as in the previous
version.



If you don't already have a MKII, they are available
for $10 USD. I also
sell the Quiet Vent kit, $5 USD. The QV quiets the
air noise from the
Mecaplex flip-out side vent by 10 dba (measured in
ASH26E @ 60 knots with
all other vents closed) so you can get fresh air without
all the noise. The
QV is transparent when installed. To order either or
both, send payment
(check or cash) to above address along with SSAE. Your
satisfaction is
guaranteed.



All the best,



Bumper

Minden, NV

52ZZ