Nyal,

I love a challenge(g).

However, including a sweep screen with photo-optical sensor to provide data
to a remote digital angle-of-slip indicator, would cause a bodacious
increase in the $9 selling price.

We could go low tech though. Since the MKII yaw string already comes with
transparent turbulator base and a single light colored alignment dot*, it
wouldn't be that much trouble to include two additional alignment dots and a
template to install them at say, 10 degrees each side of center.

*The center alignment dot, affixed to the inside of the canopy surface, is
light colored so it doesn't tend to attract the eye, tricking it into
thinking it's outside traffic, as would a dark colored dot.

As an aside, I've seen several MKII yaw string installations where the pilot
chose not to install the included alignment dot as all. So clearly all this
is a matter of preference . . . as is the decision to continue using that
ugly old tape and yarn!!.
--
bumper ZZ (reverse all after @)
"Dare to be different . . . circle in sink."

"Nyal Williams" wrote in message
...
Some of us are waiting with abated breath (nothing
fishy here) for the Mark III calibrated model. It
is reported to have a transparent sweep screen underneath
it so as to measure the precise angle of slip and aid
in selecting the amount of rudder input required.

At 17:06 29 January 2007, Bumper wrote:
Nor did they mention the vastly improved yaw string,
the MKII 'high tech'
yaw string! The MKII is reputed, by generally refutable
and unreliable
sources, to increase L/D by at least 2 points - - but
who's counting. This
from the inventor of the 'QV quiet vent kit' (which
really does decrease
noise from the Mecaplex flip-out window vent by a full
10 db as measured in
an ASH26E at 60 knots). Contact me directly for more
info.

I'll have a supply of both with me at the SSA convention.

bumper ZZ
'Dare to be different . . . circle in sink.'


'Ralph Jones' wrote in message
. ..
On 29 Jan 2007 03:08:22 -0800, 'Doug Haluza'
wrote:

The Wikipedia article on the yaw string is featured
on the main page
today in the 'Did you know....' section as follows:

'Did you know...'

...that the yaw string, a simple tuft of yarn used
as a flight
instrument by the Wright brothers, is still in use
today?'

http://en.wikipedia.org/wiki/Yaw_string

Hm...didn't point out the importance of using a metric
yaw string on
German sailplanes...;-)

rj