Masak Scimitar I
| DONNÉES GÉNÉRALES |
| Année du premier vol (ou de design, si seul projet) |
1995 |
| Pays | USA |
| Designer(s) | MASAK, Peter |
| Premier constructeur | |
| Type d'appareil | Planeur |
| Fonction | Performance |
| SPÉCIFICATIONS TECHNIQUES |
| Envergure | 15 m |
| Longueur | -- |
| Hauteur | -- |
| Allongement | -- |
| Surface alaire | 10.5 m2 |
| Profil aile | Wortmann FX79-K-144/17 (modifié) |
| Masse à vide | 272 kg |
| Masse maxi | 510 kg |
| Charge alaire | -- |
| Vitesse mini | -- |
| Vitesse maxi | -- |
| Finesse maxi | 43 à 110 km/h |
| Taux de chute mini | -- |
| Nb sièges | 1 |
| Ballast | 113 L |
| Structure | Fuselage fibre de verre. Longerons S-glass, revêtements kevlar. |
[Alex Sailplane Directory]
[Dessin Michel Blanchard]AUTRES INFORMATIONS
| Constructeur(s) |
| ||||||
| Infos techniques | Empennage en T. The Scimitar is a 15 m. racing class sailplane which matches an advanced Discus planform wing with electronic boundary layer control married to a Schempp-Hirth Ventus fuselage. The Scimitar II is a Standard Class sailplane developed form the Scimitar I.[ASD] Peter Masak was the designer and builder of the Scimitar sailplane prototype, based on the Schempp-Hirth Ventus. It employed many of his design modifications, including a completely new wing and tailplane. The composite wing used a flexible S-glass torsion box spar, with stiff kevlar skins. "We get superior twist characteristics as a function of speed," Masak claimed. And the soft bending "reduces the local angle of attack during gusts to better keep the airfoil in the laminar-flow range." The wing planform was optimized continuously along the entire span, dispensing with typical straight-tapered sections. It won the Design News magazine Unique Airplane design contest in 1995. The Scimitar featured an acoustic boundary layer flow control system to prevent laminar boundary layer flow separation, using a smaller, more highly cambered airfoil with a greater lift coefficient. "It's always good to have laminar flow," says Masak, "but you'd rather have turbulent attached flow than laminar separation." | ||||||
| Histoire résumée | He flew a later version of this glider, with factory built Ventus 2 wings, in the 2004 U.S. 15 Meter Nationals gliding competition being held at Mifflin County Airport, the same contest he won 11 years earlier. While flying a competition task, he crashed in a syncline fold in the Tussey Mountain ridge, a few miles south of the village of Alexandria, Pennsylvania at 40°29.94′N 78°08.49′W / 40.499°N 78.1415°W / 40.499; -78.1415. He was attempting to cross the ridge line upwind, and encountered sinking air and turbulence in the lee of the mountain crest, resulting in an inadvertent stall/spin.[9] The crash was not survivable, and he was killed on impact. In his glider, he installed an Emergency Locator Transmitter (ELT), although it was not required. The wreckage was found in less than 24 hours, even though it was in steep terrain in a remote forested water-shed area, not visible from the air. As a result of this accident, and the subsequent search and rescue, ELT's are now required in many gliding competitions.[Wikipedia] | ||||||
| Liens personnalités | Pas de personnalité associée. |
SOURCES DOCUMENTAIRES
| Liens WEB | Site : Wikipedia : Peter Masak . Biographie. (2010-03-23 CL) Site : Alex Sailplane Directory . Note + photo + specs. (2010-03-23 CL) Site : Wikipedia (en) . Page Masak Scimitar.. (2013-03-17 CL) |
| Livres | Pas de livre référencé. |
MODÈLES RÉDUITS
| Pas de plan ou kit référencé. |
Fiche n° 886 [Dernière mise à jour : 2013-03-22]
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