Hydraulic System DREAMLINER Transport Elements(cont Repair processes and techniques for 5,000 psi tubing are anticipated to be nearly identical to current airplanes Processes and techniques used on current airplanes will be used with different parts Example repair methods being developed include Cut-out and drop-in replacement tubing sections using existing swaging techniques 5,000 psi flex hoses permitted for repair in lieu of hard tubing runs 5000 psi Ti tubing replacement with 5000 psi CRES tubing using 21-6-9 is planned(similar to 3000 psi systems Replacement with oEM-built tube assemblies Similar to 3000 psi airplanes boeing will offer to cooperate with airbus to harmonize repair methods and repair tools Boeing Proprieta
Boeing Proprietary Hydraulic System Transport Elements (cont.) ◼ Repair processes and techniques for 5,000 psi tubing are anticipated to be nearly identical to current airplanes ◼Processes and techniques used on current airplanes will be used with different parts ◼ Example repair methods being developed include: ◼Cut-out and drop-in replacement tubing sections using existing swaging techniques ◼5,000 psi flex hoses permitted for repair in lieu of hard tubing runs ◼5000 psi Ti tubing replacement with 5000 psi CRES tubing using 21-6-9 is planned (similar to 3000 psi systems ) ◼Replacement with OEM-built tube assemblies ◼Similar to 3000 psi airplanes, Boeing will offer to cooperate with Airbus to harmonize repair methods and repair tools
Hydraulic System DREAMLINER Transport Elements(cont ■ Hoses CRES& Kevlar-new specification (SAE standard)for 5000 psi ■ Fittings ■ Permanent 5000 psi Ti tubing: Axially swaged fittings Return tubing: Investigating the use of axial swaged fittings ■ Re-connectable 5000 psi re-connectable fittings will use very fine threads(compatible with Airbus) New re-connectable tube end fitting Boeing Propriet
Boeing Proprietary Hydraulic System Transport Elements (cont.) ◼ Hoses ◼CRES & Kevlar – new specification (SAE standard) for 5000 psi ◼ Fittings ◼Permanent • 5000 psi Ti tubing: Axially swaged fittings • Return tubing: Investigating the use of axial swaged fittings ◼Re-connectable • 5000 psi re-connectable fittings will use very fine threads (compatible with Airbus) • New re-connectable tube end fitting
Hydraulic System DREAMLINER Transport Elements(cont Solid film lubricated B-nut Wired”nut 1. Allows sleeve to assemble off axis 2. Eliminates tube sleeve 3. Reduces friction union and increases sealing force B-nut Spherical acorn sealing surface New Re-connectable 1. Allows sealing with off-axis assembly 2. Lack of pilot prevents jamming, reduces cost Tube End Fitting 3. Grit blasting not allowed on sealing surfaces 4. Eliminate chatter marks and out-of-round sealing surfaces Boeing Propriet
Boeing Proprietary Hydraulic System Transport Elements (cont.) “Wired” nut: 1. Allows sleeve to assemble off axis 2. Eliminates tube twist 3. Reduces friction and increases sealing force Spherical acorn sealing surface: 1. Allows sealing with off-axis assembly 2. Lack of pilot prevents jamming, reduces cost 3. Grit blasting not allowed on sealing surfaces 4. Eliminate chatter marks and out-of-round sealing surfaces union sleeve B-nut Solid film lubricated B-nut New Re-connectable Tube End Fitting
Hydraulic A System Architecture DREAMLINER B础 LEFT SYSTEM HYDRAULIC ROUTING CENTER SYSTEM RIGHT SYSTEM ELECTRO-MECHANICAL ACTUATORS RAT POWER Boeing Proprieta
Boeing Proprietary Hydraulic System Architecture 7E7 HYDRAULIC ROUTING LEFT SYSTEM CENTER SYSTEM RIGHT SYSTEM L C L E E R C E R E L C R R R L L RAT RAT RAT C L C RAT R C RAT L C RAT R C R RAT EDP EDP EMP EMP RESV RESV RESV TR TR EXTEND STEER ALT EXTEND LE FLAPS TE FLAPS RAT EMP EMP HE HE HE C RAT MCMC MC MC ELECTRO-MECHANICAL ACTUATORS RAT POWER C