WILLS WING INC. 500 West Blueridge Orange CA USA 92665-4206
Fax (714) 998-0647 Phone (714) 998-6359
RamAir 154/146 Owner's Manual Addendum:
Bridle Setting Measurements and Limits - July 4, 1994
In order to check your bridles for proper adjustment, the following measurement
procedure should be used:
On a flat and level floor, set up the glider completely as if you were going to fly it, and
allow it to rest on the control bar basetube and rear end of the keel. Using a light weight
thread, run a length of thread from the rear tip of each bridle batten over the keel tube to
the corresponding batten on the other side. Attach the thread to the batten end by tying
an open loop in the end of the thread, and looping it over the batten tip (this will result if
done properly in the thread aligning itself with the centerline of the batten tube). Make
sure to adjust the thread length so that the thread is stretched under tension, and
therefore does not sag measureably across the span of its length.
At each of the three VG settings, measure the height above the top surface of the keel
tube of each of the four threads. To insure that the glider has the minimum required
pitching moment values, these measurements should be those shown in the chart
below, plus or minus 3/8”.
Bridle @ #4 Batten
154 146
Bridle @ #5 Batten
154 146
Bridle @ #6 Batten
154 146
Bridle @ #7 Batten
154 146
VG
Loose
2” 2 5/8”
3 1/2" 3 1/2”
4” 3 3/4”
4 3/8" 4”
VG
Middle
1/2" 1 3/8”
2 3/8" 2 3/8”
2 7/8” 2 3/4”
3 1/8” 2 7/8”
VG
Tight
Intersects 1/16”
Tube
1 3/8" 1 1/8”
1 7/8” 1 3/4”
2 1/4” 2”
If, on either model, the measurements are less than those shown, the adjustment of the
lower compensator attachment rope should be shortened as necessary.
The measurements can generally be up to 3/8" greater than those shown (bridles
adjusted tighter) without the bridles being so tight that they interfere with the glider's
flight characteristics. Refer to the rest of the material on bridle adjustment in this
manual.