Wing Vertical Stabilizer
Wing has developed a Vertical Stabilizer attachment
for the purpose of helping hang glider pilots
minimize or eliminate problems with roll /
yaw oscillations. The tendency towards
oscillations of this type is present to some
degree in all high aspect ratio gliders, particularly
when flying at faster speeds in turbulence,
and when towing (especially aero-towing).
Pilots with sufficient skill and experience
can usually control or prevent such oscillations.
Pilots who are making the transition from
entry level gliders to high performance gliders,
and pilots learning new skills such as aero-towing,
are often unable to adequately prevent or
recover from these oscillations. In
the case of aero-towing, this can be enough
of a problem to be a barrier to learning this
new skill. The Stabilizer is a great
accessory for the advancing Beginner to Intermediate
of the inside of a Vertical Stabilizer,
showing frame assembly
The stabilizer increases
yaw stability and yaw damping, and as
a result makes the glider substantially
less susceptible to getting into oscillations,
and makes it easier to recover from them.
It also slows down the glider's roll response
slightly, and changes the roll / yaw coupling
somewhat. The Stabilizer installs
(and is removed and packed) easily (see Vertical
Stabilizer Installation Instructions).
It can be used on every flight, if desired.
Alternately, the pilot can choose to use
it only in some conditions, or only during
the initial transition to a new glider,
or trying a new skill, such as aero-towing.
are two particular situations in which we
highly recommend the use of the stabilizer:
- A pilot making the transition from a Falcon class glider to a higher performance, higher aspect ratio glider. In this case, the stabilizer provides an "intermediate configuration," in terms of roll / yaw response, which eases the adjustment to what would otherwise be a more significant and difficult change in flight characteristics.
- A pilot learning how
to aero-tow. In this case the
stabilizer makes it much easier for
the pilot to remain "on track"
following the tug.
The recommended sequence
in either case would be:
- Fly with the stabilizer
in smooth air, until completely comfortable
with all maneuvers, at all speeds,
in that configuration.
- Gradually fly in more
and more active air, with the stabilizer,
until completely comfortable in the
most active air in which you wish
- If desired, remove
the stabilizer, and fly in smooth
air, all speeds and maneuvers, until
completely comfortable without the
- If desired, repeat
step (2), without the stabilizer
CAUTION: No vertical stabilizer should ever be attached in such a way that it is not oriented exactly vertically, and secured solidly against rotation. Gliders with removable rear keel sections must have those sections secured to the main keel with a through bolt or pin prior to mounting and using a stabilizer.
The following notes
will help you determine which parts are
correct for your application:
- Current production U2's and Sport 2's are made with a removeable rear keel stinger, secured to the keel with a clevis pin and safety. This stinger can simply be swapped out for a pre-drilled and bushed stinger (40B-4001 - STINGER 42MM U2/S2 BUSHED FOR STABILIZER) that will accept the stabilizer frame. If you are ordering a new U2 or Sport 2, and request a stabilizer ready keel at the time of order, we will ship the glider with the bushed stinger installed at no extra charge.
- A pilot who has a
glider with the keel bushings already
installed (all late-model Ultra Sports,
for example) can buy just the 40S-1450
Stabilizer Assy (Frame and Cover Only)
and fit it to his keel.
- A pilot who has any
other glider needs to purchase the
appropriate 40S-1420, 30, 40, or 45
Stabilizer Keel Extension Assembly
to fit the keel size they have:
Wing Glider Models
||Falcon 2, U2, Spectrum,
Super Sport, XC, HP AT, Falcon
140/170, Sport AT, Sport E,
HPII 88/89, Sport American
Fusion 150, Talon
167, HP II before 1988, HP
1, and earlier gliders.
- A pilot who wants
to fit a stabilizer to multiple gliders
may want to buy a number of 40S-1411,
12, 13, 14 Keel Extensions as appropriate.
- Stabilizer covers
are available in all standard sailcloth
colors, "WW" insignia (like
wingtip) installed on left face unless
- The Elbow Coupling
is attached to the frame trailing
edge piece, and would not normally
be purchased separately.
Wing Vertical Stabilizer
Parts & Prices
||VERTICAL STABILIZER ELBOW
||STABILIZER FRAME LEADING EDGE
||STABLZR FRAME TR EDGE W/ELBOW
||STABILIZR KEEL EXT FITS 42MM
||STABILIZR KEEL EXT FITS 1 3/4
||STABILIZR KEEL EXT FITS 50MM
||STABILIZR KEEL EXT FITS 1 1/2
||STABILIZR KIT ASSY FITS 42MM
||STABILIZR KIT ASSY FTS 1 3/4
||STABILIZR KIT ASSY FITS 50MM
||STABILIZR KIT ASSY FITS 1.5"
||STABILIZER - FRAME & COVER
||STABILIZER CLOTH COVER
Note: Retail prices listed are Wills Wing's suggested retail prices not including packaging for shipment from the factory, freight costs to the destination, import and local taxes, and dealer preparation and delivery charges. For safety reasons, any products shown that require any particular expertise to install or use safely must be purchased through, and personally delivered to the end user by an authorized Wills Wing Dealer. Retail prices listed for gliders are applicable to gliders selected for purchase from the web site inventory glider list. For any glider not selected from the inventory list, at a minimum, a charge of $150 for customer selection of colors will apply, (except for the T2C where customer color choice is included in the price), in addition to any applicable upgrade charges for extra cost options selected. Inventory gliders are created in the process of balancing sail cloth inventory and selling used demo gliders or gliders resulting from cancelled orders. Inventory gliders may not always be available in all models and sizes.
27 July, 2007