Deutscher Hängegleiterverband e.V.

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Eazy M

Sicherheitsklasse 3
Eazy M

Instability rating

Safety class 1 Safety class 2 Safety class 3 Safety class 4 Safety class 5
asymmetric collapse
course change
forward pitching
height loss
sink velocity
G-Force
Frontal collapse
course change
Speed (Recovery)
height loss
Spiral dives
G-Force
Sink velocity after 720°
Maximum sink velocity
Behaviour on brake release
course change after spiral dive exit
Height loss during recovery
Safety class 3
Pilot skill requirements:
Recovery techniques and experience levels greater than those learned in initial training.
SIV training recommended.
Regular flight practice.

Glider characteristics

Launch preparations: easy
launch characteristics: balanced, delayed climb, needs gentle guidance, good feedback during inflation, little braking required, slows before zenith, control check simple, low takeoff speed
asymmetric collapse: canopy colllapses at high angle to leading edge, en: EinklapperDynamikGering, total course change 180-270°, (3), moderate course change rate, moderate forward pitching 45-60°, (2), moderate height loss 30-39 m, (2), moderate sink velocity 15-19 m/s, (2), G-Force < 2,5 G, (1)
Frontal collapse: canopy collapses with high total collapse aera, moderate pitch backwards 30-45°, low pitch forwards <30°, low dynamics, course change <90°, (2), variable recovery behaviour, at times immediate, at times delayed, automatic recovery, (3), usually symmetric recovery, delayed return to normal airspeed, short deep stall phase, high height loss 40-49 m, (3)
Spiral dives: rapid sink velocity increase, Very low G-Force < 3 G, (1), Sink velocity after 720° <18 m/s, (3), High maximum sink velocity < 22 m/s, (3), sink velocity increase < 3 m/s on brake release, (1), Course change 180-360° after spiral exit, (2), low height loss during recovery < 30 m, (1)
B-Stall: normal force required, moderate pitch backwards 15-30°, moderate pitch forwards 15-30°, stable sink phase, no tendency to deform, immediate return to normal airspeed, 8-10 m/s, height loss on recovery < 20 m
big ears: simple initiation, stable flight phase, immediate automatic recovery, Vsink unaccelerated 3-3,5 m/s, Vsink accelerated 4-4,5 m/s, Vunaccelerated 3-5 km/h less than trimspeed, Vaccelerated 3-5 km/h faster than trimspeed
Steering behaviour: balanced to agile, 75 cm brake travel range, very noticable brake pressure increasse, Late stall point, easily identifiable

Notes

en:
Launch preparation:
The risers on Airdesign's Eazy are particularly well designed: B-risers and outer A-risers
are clearly marked with stickers to help prevent the wrong riser being chosen in
maoeuvres such as B-stalls and big-ears. It's not just a gimmick – it is a feature useful in real-life – in March this year a serious accident occurred when a school pilot ended in a spin after pulling the wrong riser (stabilizer line). Somewhat unusual is the way the outer A-line attaches to the riser with its own mallion, instead of having a separate riser extension to aid big-ears.

Launch Characteristic:
Airdesign seem to have payed particular attention to making a glider easy to start for
beginners. The Eazy needs a sharp impulse to begin followed by a bit of gentle guidance. Then the canopy climbs slowly and homogeneously and slows automatically just before the zenith. No overshooting, and only little brake inputs are required to stabilize it there. Gradient's Bright 5 is also simple to start, but somewhat different to handle. The canopy inflates with a gentle start impulse and doesn't provide the pilot with much feedback as it climbs. The climb is homogeneous and without any break-out tendencies and slows automatically just before the zenith. No large brake inputs are required to stabilise it there. Care should be taken during the control check phase – too much brake will cause the canopy to fall quickly back behind the pilot.

Asymmetric Collapses:
In this test the Eazy from Airdesign and Gradient's Bright 5 had the most benign
reactions. The Czech glider reacts generally a little more dynamically, especially on pitch
forward dives when recovering from extreme collapses. If this occurs, then a collapse on
the opposite wingtip may follow, but without any great course change. Height loss during
this manoeuvre was normal for the A-class, and between 30-40 meters.

Front Collapse:
Airdesign's Eazy can also take a little longer to recover on occasion, especially from large front stalls, where the canopy first opens in the middle and the wingtips require longer to re-inflate.

Spiral Dive:
Airdesign's Eazy reacts rather dynamically for an LTF-A glider on entering a spiral. Sink
velocities of nearly 20 m/s are reached after the second turn. Recovery characteristics are excellent – immediate exit with low height losses.

B-Stall:
Very stable sink phase, low pitching back and forward. Immediate recover.

Big Ears:
Very easy, wingtips stable, no flapping, goodsink velocity.


Rating

Safety class 3

This class of paraglider react moderately to one or more of the following manoeuvres: frontal collapse, asymmetric collapse or spiral dive.
Moderately means that the above manoeuvres result in dynamic reactions from the glider and/or large height losses.

Good piloting skills which need to be regularly practised, together with good personal reaction times which are above basic training levels are required to safely fly this class of gliders.

Skill and experience levels greater than those attained in basic training are required to safely recover from the above manoeuvres. Emergency descent manoeuvres, in particular spiral dives may require advanced recovery skills. Additional training such as regular ground handling or SIV training is recommended.