produits   actualités   liens   distributeurs   qui sommes nous?
accueil   plan du site   email
précédentes coral > revues > Fly and Glide magazine, September 2001 détails













kinetik fr

kinetik plus




















zenith evolution



zephyr pw

Review of Windtech Coral «29»

By Andi Pfister from Fly and Glide Magazine

Translated from German by Verena Jurthe, with thanks.

Windtech celebrated a very successful debut on the German market with the basic intermediate Ambar (And advanced intermediate Quarx - CB) last year (2000 - CB). In the meantime the Spanish are offering very nearly complete range of gliders with DHV certifications. The Coral is designed mainly for student pilots and newcomers.

Windtech has built it's name in the German market quite quickly due to the engaging efforts of the importer Skyline. Boss Wolfgang Gengha mmer did not always find it easy to control the floods of papers between the Windtech head office in Gijon, Spain, and the DHV. But the fluent Spanish spoken by employee Rainer Scheltendorf and his prolonged stay in Gijon have certainly eased the co mmunication.

In the meantime four Windtech models have achieved DHV rating (Now seven Windtech models are DHV certified - and counting - up to October 2002. These are: Coral DHV 1, Tonic DHV 1, Ambar DHV 1-2, Serak DHV 1-2, Quarx DHV 2, Quarx 2 DHV 2, & Tucan DHV 1-2 - CB) and missing now is only a serial High Performance wing. But since the competition glider Silex covers the needs of most performance-orientated pilots outside Germany and Austria, there are no plans for a DHV rated Model above the Quarx. (Since this article was written, the Syncro is Windtech's new High Performance Serail wing which has already been released and has passed Afnor Performance in all sizes - CB).

The lavishly built Serak replaced the AFNOR rated basic intermediate Siena this su mmer and it's middle size has already got the DHV 1-2 rating (Now the Serak is certified DHV 1-2 in sizes S, M, and L. There is also an XS size, with certification pending - CB).

Almost at the same time the new Tandem Tucan (Bi version of the Serak - CB) received DHV 1-2 rating.


The Coral, planned as a beginner glider, received the DHV 1 rating in all three sizes: 27, 29 and 32. That covers all-up weights from 60 to 120 kg.

Developed by Computer Design specialist Alvaro Valdes, this paraglider convinces especially with its high inner pressure. The wing is always full of air and hardly lets anything out! It introduction a conventional cell structure without diagonal ribs. All 29 cells have direct hang points to Aramid Lines (Edelrid), and the cell walls near the leading edge are strengthened with Dacron. Between the hang points are bands to relieve the tension. The strong tension on the trailing edge is tri mmed with a Polyester band. Five different upper wing colour designs, always with a white underside, are available: Purple/White, Purple/Gold, Red/White and Blue/White, Blue/Gold.


The launch preparations are very quick and easy. The few long (main, lower) lines of the Coral and many upper line cascades, mean that the sorting is easily done.

Only a small first impulse with little effort is required to launch in nil wind. Because of the big cell entries the glider fills with air reliably. After that the wing comes up above the head continuously and fairly slowly. Only minimal guidance on the A- lines is needed throughout the launch.

Once above the pilot the Coral does not need to be slowed down, or hardly so. Even with quite dynamic pull the glider does not overfly the pilot. The low weight of the canopy, due to the conventional cell structure, adds to comfortable reverse launches and playful ground handling. The launch speed is astonishingly low.

Flight behaviour

The high stability and calmness were convincing already after a few minutes on my test flight. Several more flights consolidated this impression for me. Especially any pitch and yaw turbulences are well absorbed with this beginner wing.

The brake power is, in view of its class, medium to low, and the brake travel relatively long. It is impossible to get the glider to parachute or full stall without wrapping the brakes. (This is an intrinsic part of the design of the Coral, and a very good thing indeed for new and low airtime pilots. It's VERY difficult for someone to stall or spin the Coral by accident. - CB)

Although the Coral is not a lively glider it is actually very nice to handle and performs precise manoeuvres. Because it reacts well to weight shifting, it is worthwhile combining body input (weigh-shift - CB) as well as steering with the brakes. To induce flat turns the use of the outer brake is also of advantage - which is no different to other gliders. The Coral pitches only slightly entering stronger lift, which is good for a glider in this class.

As mentioned before it takes a lot of time and effort to even get close to a stall. That also includes asy mmetric stalls. Unintended stalls through over braking should therefore be actually impossible with this Windtech beginner wing.

Because of its extremely good-natured behaviour in extreme flight - even if a stall is induced - this glider can be clearly certified " suitable for schooling" with a good conscience.

The high pendulum stability of the Coral meant that it recovered from unstable situations on all our test flights with very little pitch.

The reaction to tucks on this beginner wing is exemplary: it takes a lot of force to introduce an asy mmetric. At trim speed the A-lines are very hard to pull. The behaviour afterwards is very unspectacular. After a slow and small turn of max. 90 degrees the wing opens again i mmediately and very positively. The high attenuation along both, long and transverse, axis induces only very slight pitching of the wing.

At accelerated speed, the Coral reacts in a very similar fashion to asy mmetric tucks. It turns only moderately, pitches very little and re-inflates after 120-180 degrees on its own accord and almost as fast as at trim speed.

We pulled asy mmetrics after inducing some pitching and the Coral turned a little more and pitched a little more but again opened within less than 180 degrees. With dynamic tucks like this the otherwise good reaction to weight shift appears here a little negative. Note that I am always passive in all these test flight tucks and do not try to counteract with the brakes or indeed weight shift. Even inexperienced pilots can easily stabilise the Coral using counter brake and weight shift to retain the flight direction without turning.

Descent manoeuvres

Big Ears: It takes a bit of effort to pull the outer A- line. The Folded Ears do not deflate completely and tend to reopen. Strong resistance remains during the manoeuvre - big ear pulleys would ease keeping the ears in. The sink rate is 2.5 m/sec and increases to 3 m/sec with the use of a speed bar. On full speed bar the ears try to re-open, and the roll increases with big ears too. To avoid much pendulum the weight shifting should be gentle.

B-Stall: To initiate a B-stall takes a lot of pulling effort. The wing is not willing to stall and does not go across the whole span. Keeping the B-stall in remains an effort; nevertheless it achieves a sink rate around 8m/sec. Releasing the B- risers the wing returns to normal flight quickly and reliably.

Spiral Dive: The Coral requires a fairly positive input to initiate a spiral dive. The easy way to get into this manoeuvre is to enter it after a wingover. Once in a spiral dive the Coral shows a good descent rate and flies very smoothly, not flapping or fluttering. There was no need to correct with the outer brake even in hard spirals. In a neutral sitting position and releasing the brake the wing returns to normal flight without hesitation and without a high pendulum.


The Windtech - Beginner Coral in its whole performance lies cleanly in the DHV 1 class. With my all-up weight of 92 kgs. I achieved a trim speed of 35 km/h and on full acceleration I could measure 44 km/h. The Coral speed bar works nice and easy. When full on the lines begin to vibrate a little. I reached min. sink of 1.2 m/sec at 30 km/h.


The Coral is a brilliant school or beginner glider, as well as suitable for safety- orientated occasional pilots or mountaineers. Due to its stability and calmness, its easy launch characteristics and exceptional good behaviour in extreme manoeuvres this wing is a reliable partner. This beautifully formed wing leaves nothing more to be desired in view of safety and is easily handled even in extreme flight.

données tech.






contrôle qualité

> revues index