FlightGlobal y va de son article, par Stephen Trimble !
PB de rigidité de la perche Cobham, mais les Pods (Cobham aussi !)* sont difficiles à qualifier, cequi pourrait mener les livraisons "conformes" à Octobre 2018 !
Bon, si j'ai bien compris, l'avion vole bien, mais rien ne donne satisfaction côté ravitaillement
J'ajoute, et c'est développé plus bas ...!
Peut être des tuyaux trop courts sur le KC46, encore un coup du "Décamètre écossais" à
75 pieds ! Bon, suffit de greffer d'urgence des pod de A330 MRTT,
C'est d'ailleurs ce qu'a choisi le KC-390, et presque**comme tout le monde,
un tuyau de 90 pieds !
**Sauf le A400M, lui doté de
80 pieds seulement, cherchez l'erreur !
https://www.flightglobal.com/news/articles/kc-46a-boom-problem-busts-usaf-schedule-425823/
The Milestone C decision, which determines the start of full-rate production, had already slipped from April to June and is now in August, the USAF says. Service officials blame a nagging hardware problem with unexpected loads on the fly-by-wire refueling boom for the move to delay the Milestone C decision another two months.-----------------
The Cobham-made wing aerial refueling pods (WARPs) continues to face qualification challenges and are now expected for delivery to the USAF in October 2018, Boeing says. The first 18 aircraft delivered in the summer or fall of 2017 will come equipped with refueling booms and centerline drogue refueling systems, but the WARPs will not be available for another year.------------------------------------
Où je comprends moins bien, c'est, le cas des "Pods" du KC-46, les Cobham fonctionnent bien depuis longtemps, sur le A330MRTT, on se demande ce que Cobham a pu inventer (Ou Boeing/USAF exiger), pour conduire à transformer qq chose qui marche bien, en un équipement à problèmes
longueur du tuyau, allégements (Non!), miniaturisation/trainée peut être ...
http://militaryaircraft-airbusds.com/Aircraft/A330MRTT/A330MRTTAbout.aspx
The Cobham 905E Under-Wing Pods, currently in service and proven in operation, enable the A330 MRTT to refuel any NATO or allied Probe-equipped receivers such as the Eurofighter, the Tornado, the Jaguar, the F/A18 Hornet or the Sukhoi 30. The A330 MRTT physical compatibility with receivers across the world is established, demonstrated and certified to allow coalition interoperability.
The 900 series Wing-Pods incorporate a digitally controlled and electrically operated Hose drum unit, optimizing reliability and maintainability.
-* Cobham :
http://www.cobham.com/mission-systems/air-to-air-refuelling/hose-and-drogue-systems/wing-air-refuelling-pods/
Étonnant, le Pod Cobham serait
plus léger et plus performant sur le 330 MRTT, et le tuyau plus long Alors,
un tuyau trop court sur le KC-46 ??
Le POD KC-46 chez Cobhamhttp://www.cobham.com/mission-systems/air-to-air-refuelling/hose-and-drogue-systems/wing-air-refuelling-pods/kc-46-refuelling-systems-datasheet/
RP-910E-75 Wing Aerial Refueling Pod Flow rate 400 gallons per minuteWeigh Weight Up to 1425 pounds
Delivery Pressure 50 psig
Platform IntegrationBased upon existing wing pods currently in service
Hose Length 75 ft trailed length
Operating Envelope 180 to 325 kiasLe POD A330- MRTT Cobhamhttp://www.cobham.com/mission-systems/air-to-air-refuelling/hose-and-drogue-systems/wing-air-refuelling-pods/a330mrtt-refuelling-systems-datasheet/
905E Wing Pod Flow rate Up to 450USgpmWeighWeight Up to 1100lbs (500kg) dry
Delivery pressure Operator selectable up to 50psig
Platform integration Integrated onto A330MRTT
Hose length Up to 90ft (trailed length)
Operating envelope Fixed wing 185 – 350kts