Mk II yaw string

On Tue, 01 Sep 2009 10:01:50 GMT, Stealth Pilot
wrote:

On Mon, 31 Aug 2009 20:28:33 -0700 (PDT), Warren
wrote:

Looking for "bumper"....I need to send information on his Mk II yaw
string to a sailplane enthusiast in Kansas. I did a search on this
site but couldn't find anything. Thanks for you help.

Warren Evans

isnt the mk1 version a tetleys tea bag string?
you're allowed to use twinings earl grey string if you cant stand the
tetleys.

No good for German ships. Tetley's is not metric.

rj

On Sep 2, 10:19*am, Eric Greenwell wrote:
bumper wrote:
I'll send you all the ordering info for the MKIV yaw string (still
only $10, even though it is made for the very rare, endangered, and
expensive gizard of the Sandhill Crane). Well, in the interest of
honesty, it might be made out of man made synthetic gizard.

Nonetheless, an *authentic* synthetic gizzard!

--
Eric Greenwell - Washington State, USA
* Change "netto" to "net" to email me directly

* "Transponders in Sailplanes"http://tinyurl.com/y739x4
* * * Sections on Mode S, TPAS, ADS-B, Flarm, more

* "A Guide to Self-launching Sailplane Operation" atwww.motorglider.org

I stretched my buget and ordered the famous yaw string with Bumper's
assurance that a World Record was in the bag as soon as I used it.
Wrong, wrong, wrong!! I flew for two whole months before I made a
World Record Claim. I suspect it was the synthetic gizard that caused
the delay. I wonder if I can get a partial refund.

I hear that there is a profuse review on the Numlus Soaring Supplies
site and a 190 page manual written by the servant.

After extensive testing, I have found that the closer the MKIV is
mounted to the front of the canopy, the more sensitive it is to slip
and skid, probably because of tighter radius of curvature of the
canopy. I had to install four, using the one closest to the horizon
for whatever speed I’m going since I want more sensitivity at slower
speeds. With + flaps you have to remember to watch one higher than
the one at the horizon to maintain sensitivity calibration.
Fortunately, at full flaps on final you don’t use the yaw string much
so it isn’t necessary to make sensitivity compensation.

AGL

On Thu, 3 Sep 2009 05:52:48 -0700 (PDT), AGL
wrote:


I had to install four, using the one closest to the horizon
for whatever speed I’m going since I want more sensitivity at slower
speeds.

This is the current German 15m-champion's opinion about the
sensitivity of a yaw string:
Even with a significant sideslip angle it's better to let the glider
straiten itself (rudder centered) instead of using rudder all the time
to keep the yaw string centered precisely.

In his opinion the deflected rudder produces more induced drag than a
moderate yaw angle (=up to 20 degrees yaw string deflection).
In my opinion success proves him right.


Cheers
Andreas
Bye
Andreas

On Sep 2, 2:38*am, ContestID67 wrote:
Bumper - Sure glad to hear about the gizard switch. *I had a scary
visited yesterday from Guido Sarducci of the Chicago office of the
ASSCLA (Affiliated Society of Sandhill Crane Lovers of America) due to
your transgressions. *He said you were going to "...sleep with the
zebra mussels..." if you didn't change your ways.

I abhor violence . . . especially if it's directed toward me. Tell
Guido I'll meet with him and his labor union goon for some Tetley's*
and steamed zebra mussels.

*This could obviously be a "teachable moment" if I liked beer.

On Sep 2, 2:22*pm, Vsoars wrote:
On Sep 2, 10:19*am, Eric Greenwell wrote:





bumper wrote:
I'll send you all the ordering info for the MKIV yaw string (still
only $10, even though it is made for the very rare, endangered, and
expensive gizard of the Sandhill Crane). Well, in the interest of
honesty, it might be made out of man made synthetic gizard.

Nonetheless, an *authentic* synthetic gizzard!

--
Eric Greenwell - Washington State, USA
* Change "netto" to "net" to email me directly

* "Transponders in Sailplanes"http://tinyurl.com/y739x4
* * * Sections on Mode S, TPAS, ADS-B, Flarm, more

* "A Guide to Self-launching Sailplane Operation" atwww.motorglider.org

I stretched my buget and ordered the famous yaw string with Bumper's
assurance that a World Record was in the bag as soon as I used it.
Wrong, wrong, wrong!! I flew for two whole months before I made a
World Record Claim. *I suspect it was the synthetic gizard that caused
the delay. I wonder if I can get a partial refund.- Hide quoted text -

- Show quoted text -

Your refund claim is hereby denied.

The MKIV is guaranteed to increase L/D by at least two points (maybe)
and is more than adequate for most soaring applications (English,
Metric and Whitworth). For world records attempts, we recommend the
"World Record" patch (ver. MKIV/wra), available separately for $29.95
plus S&H. Shipping and Handling is only $299.95 USD. With the wr patch
installed, you will achieve world wide recognition (or ridicule). If
not, your money will be cheerfully refunded (less shipping and
handling).

bumper

....and shipping and handling is 110% of the total production cost (ala
info-mercials "But wait! There's more! It's free! Just pay S/H!").

Design idea - If a yaw string that is 0.00075 furlongs long - as
measured with my horse - is pretty good, wouldn't a yaw string
extending from the front to the back of the canopy be better? Then I
will always have the string in view and can easily detect if my head
are slipping more than my knees (which makes me weak in the knees).
This will really work well with DG's. Or can't you buy gizzards that
long?

My $0.0000002 (Zimbabwean).

John

ContestID67 wrote:
...and shipping and handling is 110% of the total production cost (ala
info-mercials "But wait! There's more! It's free! Just pay S/H!").

Design idea - If a yaw string that is 0.00075 furlongs long - as
measured with my horse - is pretty good, wouldn't a yaw string
extending from the front to the back of the canopy be better? Then I
will always have the string in view and can easily detect if my head
are slipping more than my knees (which makes me weak in the knees).
This will really work well with DG's. Or can't you buy gizzards that
long?

I've heard *bumper Manufacturing, LLC*, recommends a minimum of six (6)
MK IV yaw strings mounted centered and in-line from the front of the
canopy to the rear of the canopy. Order seven so you have a spare, and
you may be able to negotiate a reduced shipping charge!

--
Eric Greenwell - Washington State, USA
* Change "netto" to "net" to email me directly

* "Transponders in Sailplanes" http://tinyurl.com/y739x4
* Sections on Mode S, TPAS, ADS-B, Flarm, more

* "A Guide to Self-launching Sailplane Operation" at www.motorglider.org

On Sep 3, 3:51*pm, Eric Greenwell wrote:
ContestID67 wrote:
...and shipping and handling is 110% of the total production cost (ala
info-mercials "But wait! *There's more! *It's free! *Just pay S/H!").

Design idea - If a yaw string that is 0.00075 furlongs long - as
measured with my horse - is pretty good, wouldn't a yaw string
extending from the front to the back of the canopy be better? * Then I
will always have the string in view and can easily detect if my head
are slipping more than my knees (which makes me weak in the knees).
This will really work well with DG's. *Or can't you buy gizzards that
long?

I've heard *bumper Manufacturing, LLC*, recommends a minimum of six (6)
MK IV yaw strings mounted centered and in-line from the front of the
canopy to the rear of the canopy. Order seven so you have a spare, and
you may be able to negotiate a reduced shipping charge!

--
Eric Greenwell - Washington State, USA
* Change "netto" to "net" to email me directly

* "Transponders in Sailplanes"http://tinyurl.com/y739x4
* * * Sections on Mode S, TPAS, ADS-B, Flarm, more

* "A Guide to Self-launching Sailplane Operation" atwww.motorglider.org

Don't forget the offical MK I AOA Indicator, the first major design
variant after the MK IV yaw string. Mount one of them on either side
of the canopy and make your glider virtually stall proof. Includes the
official AOA grease pencil and protractor kit if you order today.
Operators standing by...

P3

At that length the price is doubled because you are also getting an angle
of attack indicator.

At 19:51 03 September 2009, Eric Greenwell wrote:
ContestID67 wrote:
...and shipping and handling is 110% of the total production cost (ala
info-mercials "But wait! There's more! It's free! Just pay
S/H!").

Design idea - If a yaw string that is 0.00075 furlongs long - as
measured with my horse - is pretty good, wouldn't a yaw string
extending from the front to the back of the canopy be better? Then I
will always have the string in view and can easily detect if my head
are slipping more than my knees (which makes me weak in the knees).
This will really work well with DG's. Or can't you buy gizzards
that
long?

I've heard *bumper Manufacturing, LLC*, recommends a minimum of six (6)

MK IV yaw strings mounted centered and in-line from the front of the
canopy to the rear of the canopy. Order seven so you have a spare, and
you may be able to negotiate a reduced shipping charge!

--
Eric Greenwell - Washington State, USA
* Change "netto" to "net" to email me directly

* "Transponders in Sailplanes" http://tinyurl.com/y739x4
* Sections on Mode S, TPAS, ADS-B, Flarm, more

* "A Guide to Self-launching Sailplane Operation" at
www.motorglider.org