The SR-71’s engine is actually a turboreactor inside a statoreactor. I’m awed - ►http://j.mp/KHmR9o and ►http://j.mp/N2z3FA #aviation
The SR-71’s engine is actually a turboreactor inside a statoreactor. I’m awed - ►http://j.mp/KHmR9o and ►http://j.mp/N2z3FA #aviation
OK, it’s clever but almost all the ramjets from the beginning used this technique, starting from the Leduc 022 in 1956. ►http://en.wikipedia.org/wiki/Leduc_0.22
Yes and no.
On the one hand, the P&W J58 (1958) is a direct descendant of the XF-103’s engine ►http://en.wikipedia.org/wiki/Republic_XF-103#Propulsion - though the XF103 never went pas the mock-up stage (mock-up built in 1953, cancelled in 1957). The turbo/statoreactor combination may also have got some inspiration from the Matra R-130 (1947) - a project that stopped at the design stage because it was too complicated for its time, but showed fantastically advanced features. All that is indeed very similar to the the Leduc 0.22’s engine and the one aboard the Nord Griffon. Here is a nice picture of the inside of the Le Bourget’s 0.22’s engine from the rear, showing the little turboreactor inside the huge statoreator pipe:
On the other hand there are significant design difference : the huge retracting shock cone that masks the compressor to let the air flow almost entirely bypass the turboreactor at high speeds, and most importantly the various bypass valves. In the the Leduc and Griffon the turboreactors were throttled back, but there was still significant airflow going through them, which makes them unsuitable for Mach 3+ speeds. As the technical director of Nord Aviation himself acknowledges (►http://www.flightglobal.com/FlightPDFArchive/1959/1959%20-%200777.PDF), the bypass system is heavier and more cumbersome but it enables higher Mach numbers than what the Griffon’s engine allows.
Those were crazy times in aviation...
The Matra R-130 does not have a Wikipedia page... I’m putting that on my TODO list !
Parler de l’atterrissage d’un DC-3 argentin en Antarctique en 1962 n’est pas fréquent. C’est pourtant ce qu’a fait Oh Les Timbres en abordant aussi les questions de souveraineté sur ces 965.000 km2 de terres gelées.
#antarctique #argentine #souveraineté #aviation #pôle
►http://jd-mestimbres.blogspot.fr/2012/05/atterrissage-argentin-en-antarctique.html
Les projets points de contrôle de IATA (Air Transport Association), très inspirés par la pire SF : body scan, scan de l’iris etc.
►http://www.iata.org/events/agm/2011/gallery/PublishingImages/checkpoint1-large.jpg
►http://www.iata.org/events/agm/2011/gallery/PublishingImages/checkpoint3-large.jpg
►http://www.iata.org/events/agm/2011/gallery/PublishingImages/checkpoint4-large.jpg
►http://www.iata.org/whatwedo/safety_security/security/Pages/checkpoint-future.aspx
Looking for bad people, not just bad objects: A new concept for security
SCADA Systems Are Online Now
►https://www.infosecisland.com/blogview/16696-FACT-CHECK-SCADA-Systems-Are-Online-Now.html
toujours rassurant de savoir qu’une machine aussi complexe qu’un Boeing est munie d’une passoire en guise de logiciel de contrôle d’accès…
For those who do not know, [#Boeing] #747 ’s are big flying #Unix hosts. At the time, the engine management system on this particular airline was Solaris based. The patching was well behind and they used telnet as #SSH broke the menus and the budget did not extend to fixing this. The engineers could actually access the engine management system of a 747 in route. If issues are noted, they can re-tune the engine in air.
The issue here is that all that separated the engine control systems and the open network was NAT based filters. There were (and as far as I know this is true today), no extrusion controls. They filter incoming traffic, but all outgoing traffic is allowed. For those who engage in Pen Testing and know what a shoveled shell is... I need not say more.
So, Scot... FACT CHECK, #SCADA systems ARE ONLINE!
Fichier des passagers : y’a-t-il un pilote à la Cnil ? | Jean Marc Manach
►http://owni.fr/2011/06/14/le-fichier-francais-des-passagers-aeriens-ne-respecte-pas-la-loi-informatique-e
Créé « à titre expérimental » en 2006, le fichier français des passagers aériens ne respecte pas vraiment la loi informatique et libertés, à en croire la CNIL qui... « prend acte » de la volonté du gouvernement de ficher encore plus de gens.
#Pouvoirs #Surveillance #aviation #cnil #fichiers #fpr #pnr #Schengen #sis