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Wills Wings HP / HP AT

The 1984 Wills Wings HP has all the tubes shiny anodized and the bumpers have a respectable diameter, 50.8 cm or two inches. It uses for the mounting of the top of the trapezium a profile which prohibits the mounting on the ground of the apparatus, unless it is complicated gymnastics.Therefore you must climb on the trapezium, thread the top 20 slats, 8 lower and 4 intermediates The tension of the trailing edge is not ensured by an elastic but by pre-stretched nylon cords that ensure a better stability of the settings.
It is necessary to open the intrados, to mount a hoist and to set the transversal. Two cables coming from its joint are then fixed to the keel by bolt, butterfly and broken ring. The hoist is then dismantled and hidden in the intados. You attach the nose hood perfectly realized and finish by introducing in the intrados the cover that is fixed on the keel thanks to a strap studied for.
The take-off does not present any difficulty if care is taken during the first steps. A measurement of the roll rate of 45 ° to 45 ° shoulder against the trapezoid will give 5 seconds. It becomes very difficult to stay in the corner of the trapeze, especially since the sail is tense.
With the H.P. system, the small displacement of the keel acts as aerodynamic controls. The outer sail tightens as the inner sail relaxes causing a wing effect which can be seen by measuring in flight the heights of the sail above the sticks. This aerodynamic steering effect should be amplified by a less taut sail. Only the leading edge tension and pilot centering are adjustable. Each action in roll is associated with a movement of inverse yaw. This phenomenon combined with the low yaw stability common to all pendulum-controlled aircraft makes straight line flight difficult. The wing takes the inverse course of the roll correction. You get used to it but it is disconcerting.
The damping effect of the floating keel disappears and the vibrations caused by the heat bubbling of the thermal days are felt in the horizontal bar.
The bar is provided at its ends with two holes for adjusting the dihedron. At the inner or weak dihedron hole, H.P. is completely unstable spiral. At the outer hole, the stability becomes neutral beyond 30 ° of inclination. A surprise is the take-off speed: 33 and 35km / h on a buggy with 27 to 28km / h on the other wings.
The neutral booster is always present and grows linearly according to the displacement of the bar. The landing must be well prepared by raising the hands very high on the trapezium and pushing a little earlier than on other devices due to the higher speed.

The idea of ​​removing the keel pocket is not new but Will Wings was the first one to return to this type. In maneuverability, it can not be said that there has been an improvement but the gain in finesse at intermediate speed is incontestable.
The HP 2 was also produced in 1984.
HP 2
The 1989 HP AT 158 for advanced pilots is regarded as an excellent flying glider. Launch is easy and effortless with a 10-12 knot wind. Pull VG on and it will stay banked in tight thermals with little effort while staying easy to control. It will fly fast when needed to get through turbulance and sink and slow when you want to maximize minimal lift. Landing is a bit difficult because of its small flare window that requires high authority.
HP 170
Wing area: 15.86 m²
Hang glider weight: 31 kg
Minimum pilot weight: 68 kg
Maximum pilot weight: 113 kg
HP 2 170
Wing area: 16.72 m²
Hang glider weight: 35 kg
Minimum pilot weight: 80 kg
Maximum pilot weight: 130 kg
HP AT 145
Wing area: 13.47 m²
Wing span: 10 m
Aspect ratio: 7.5
Minimum pilot weight: 50 kg
Maximum pilot weight: 107 kg
Nose angle: 127°
HP AT 158
Wing area: 14.68 m²
Wing span: 10.35 m
Aspect ratio: 7.5
Hang glider weight: 31 kg
Minimum pilot weight: 65 kg
Maximum pilot weight: 115 kg
Nose angle: 127°

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