Analysis of information sources in references of the Wikipedia article "Flap Gurney" in French language version.
« Liebeck conducted wind tunnel tests on the effect of a 1.25% chord height Gurney flap. He used a Newman-type airfoil, which had an elliptic nose and a straight line wedge for the rear section. »
« Dès qu'ils furent seuls, Unser expliqua à Gurney que l'arrière était maintenant si bien planté que la voiture poussait mal (et partait en sous-virage), d'où les mauvais chronos (Once Gurney had confirmed they were alone, Unser told him the rear was now so well planted that the car was pushing (understeering) badly, hence the poor lap times). »
« Dan me demanda de garder mon calme. Laisse les visibles [les flaps]. N'attire pas l'attention sur eux (Dan told me to relax. Leave them in the open. Don't bring attention to them.) »
« Liebeck stated that race car testing by Dan Gurney showed that the vehicle had increased cornering and straight-away speeds when the flap was installed on the rear wing. »
« L'ascension à pleine puissance est l'une des plus phases de vol les plus critiques. L'angle d'attaque du stabilisateur horizontal peut atteindre la valeur négative de -25°, alors qu'en phase d'autorotation, il peut atteindre +15° (One of the critical flight conditions is a high-powered climb. The negative angle of attack of the horizontal stabilizer can be as high as -25°, whereas in autorotation it may be +15°. »
« Ces dispositifs ont permis d'agrandir la zone de flux d'air captif au-dessus de l'aileron, comparé à un aileron sans flap (These devices provided an increased region of attached flow on a wing upper surface relative to the wing without the flaps). »
« Une technologie candidate est le flap Gurney, qui consiste en une petite réglette, d'une hauteur de 1 à 2 % de la longueur de la corde du profil, positionnée sur le bord de fuite, perpendiculairement à la direction du flux d'air (One candidate technology is the Gurney flap, which consists of a small plate, on the order of 1-2% of the airfoil chord in height, located at the trailing edge perpendicular to the pressure side of the airfoil.) »
« Le pilote automobile Dan Gurney a utilisé ce flap pour augmenter la force d'appui, et donc, améliorer la traction et les vitesses de passage dans les virages obtenues grâces aux ailerons inversés de ses monoplaces (Race-car driver Dan Gurney used this flap to increase the downforce and, thus, the traction and potential cornering speeds generated by the inverted wings on his race cars). »
« ...the intermittent shedding of fluid recirculating in the cavity upstream of the flap, becomes more coherent with increasing angle of attack.... Comparison of flow around ‘filled’ and ‘open’ flap configurations suggested that [this] was responsible for a significant portion of the overall lift increment. »
« Liebeck stated that race car testing by Dan Gurney showed that the vehicle had increased cornering and straight-away speeds when the flap was installed on the rear wing. »
« Liebeck conducted wind tunnel tests on the effect of a 1.25% chord height Gurney flap. He used a Newman-type airfoil, which had an elliptic nose and a straight line wedge for the rear section. »
« The first theoretical investigations were published by Liebeck who introduced the concept of trailing edge devices to aircraft aerodynamics. »
« When hot-wire anemometry is used, a tonal component in the spectrum of the velocity fluctuations downstream of the Gurney flap is shown. This points to the existence of a von Kármán vortex street. »
« ...the intermittent shedding of fluid recirculating in the cavity upstream of the flap, becomes more coherent with increasing angle of attack.... Comparison of flow around ‘filled’ and ‘open’ flap configurations suggested that [this] was responsible for a significant portion of the overall lift increment. »
« ...the intermittent shedding of fluid recirculating in the cavity upstream of the flap, becomes more coherent with increasing angle of attack.... Comparison of flow around ‘filled’ and ‘open’ flap configurations suggested that [this] was responsible for a significant portion of the overall lift increment. »
