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tanguy1991 a écrit :Un truc dans le genre.

TooCool_12f a écrit :

tanguy1991 a écrit :Un truc dans le genre.

oui, mais là c'est un moulin intérieur.. posé au sol, le moteur extérieur a le sommet de la nacelle à peine plus haut que l'axe du moteur intérieur, et si tu prend 40% du diamètre de la soufflante (en gros), le bas de la nacelle laboure la piste

TooCool_12f a écrit :reste juste à l'équiper de soufflantes qui rabotent pas la piste à chaque roulage

TooCool_12f a écrit :autre chose, avec une soufflante plus grande, ça va donner quoi comme garde au sol.. pour la nacelle extérieure surtout?

The Air Force has selected Rolls-Royce North America as its contractor for the B-52 Commercial Engine Replacement Program, or CERP, which will supply new F130 powerplants for all 76 of Air Force Global Strike Command’s B-52H bombers, the Pentagon announced Sep. 24. If all options are exercised, the work is worth $2.6 billion.
The F130 engine is flying on the C-37 transport and E-11 BACN (Battlefield Airborne Communications Node) aircraft. The first part of the indefinite quantity-indefinite delivery contract is worth $500.9 million. The contract calls for Rolls to supply 608 engines, to equip 76 B-52s with eight engines each, with manufacture and installation to be completed by Sept. 23, 2038. Rolls said the actual number of powerplants, including spares, is 650.
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The CERP is one aspect of a multi-pronged update of the B-52, which is also slated to receive a new radar, digital cockpit, and new connectivity upgrades. The Air Force plans to retain the B-52 into the 2050s, as a standoff weapon platform and as a direct attack aircraft when enemy defenses are limited or already beaten down. The last B-52H now in service was built in 1962, but the type is still flying with its original Pratt & Whitney TF33 engines. Early in the program, Pratt proposed an upgrade of the TF33, which the Air Force rejected.
The CERP is supposed to deliver up to 40 percent improved range and fuel economy for the B-52, reducing its tanker requirements and increasing its on-station loiter time. The engine is also supposed to be of such improved reliability that the engines need never come off the wing during the bomber’s remaining service life.
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ergo a écrit : ↑

lun. sept. 27, 2021 12:24 pm

Et toujours en lice pour enterrer le B21 xD

To win the B-52 Commercial Engine Replacement Program, Rolls-Royce digitally “built” the bomber’s wing with the company’s F130 engines installed to demonstrate its advantages, Rolls-Royce North America President and CEO Tom Bell said in an online seminar.

“We digitally integrated that engine into the pod, into the pylon, into the wing, and dynamically modeled the entire system of operation to model for the customer exactly how efficient that product would be on that wing,” which was “designed … in the 1950s, early 60s,” Bell said in a streaming discussion with Defense One. He also revealed that Rolls’ proposal calls for modifying the wing “as little as possible” in order to reduce risk.