Quote:
U. Claréus, project manager, JAS 39 Aerodynamics, Saab Aerospace
Aerodynamic highlights of a fourth generation delta canard fighter aircraft:
Si j'ai bien compris, en post-stall, le Gripen pouvait generer une rotation sur l'axe de lacet de 90*/sec controlee aux ailerons apres decrochage dynamique (PSM).In the high AOA and spin tests that has taken place since 1996 and recently concluded successfully, the normal tactic was to initiate the tests with a near vertical climb with speed dropping off to near zero and a rapid increase of AOA up to extreme angles, and the aircraft could then be “parked” at 70 to 80 degrees of alpha.
When giving adverse aileron input there, a flat spin with up to a maximum of 90 degrees per second of yaw rotation started and could then be stopped by pro aileron input. Recovery followed, whenever commanded.
http://www.mach-flyg.com/utg80/80jas_uc.html
A comparer a ca, X-31 avec TVC sur <> 180*:
http://youtu.be/prTezQ083Mo
En gros, la petite etude a laquelle je me suis livre depuis plusieur semaines m'a permis de defricher plusieur topiques relates au sujet de la supermaneuvrabilite.
Et ce qu'on y trouve n'est pas mal du tout.
Les USA ont recherche les solutions des TVC et de l'aerodynamique, une etude relativement recente concluant:
Voici la liste des documents dont je me suis servi pour ma recherche.This thesis has shown that a properly located close-coupled canard can greatly enhance lift at high angles of attack with no drag penalty when compared to a wing/body configuration.
If it is desired to perhaps more elegantly enhance lift at higher angles of attack and avoid some of the pitfalls associated with thrust vectoring -- such as the expense, weight penalty, and excessive fuel consumption -- the use of a close-coupled canard may be an excellent choice.
Bonne lecture et bon debat.
MACH Aviation Magazine - på webben]http://www.mach-flyg.com/utg80/80jas_uc.html]MACH Aviation Magazine - på webben
http://www.nasa.gov/centers/dryden/news ... -DFRC.html
http://www.surlering.com/article/articl ... -de-rafale
http://www.engbrasil.eng.br/index_arquivos/art111.pdf
http://www.onera.fr/cahierdelabo/english/amil4.htm
http://www.ukintpress-conferences.com/c ... oelgen.pdf
http://www.dtic.mil/cgi-bin/GetTRDoc?AD=ADA245152
Prenez note de la quoation de Dr. Wolfgang Herbst, le concepteur du TFK-90 Aka Eurofightrer Typhoon...