PDF Publication Title:
Text from PDF Page: 025
designed to contribute to the airframe structural stiffness. The nozzle vane box is airframe-mounted, with the vane box sidewalls serving as aircraft structure keel members. The VAVBN (Image 6) provides directional control of the LiftFan thrust vector and an additional effector to the VIGVs for turndown. Turndown refers to the commanded position of the lift fan inlet guide vanes used to control lift fan thrust. Three VAVBN vanes are driven by dual-tandem, linear, hydraulic actuators. Drive is transferred to the other three vanes through bar linkages. With this system, nozzle thrust may be directed in an arc of 41.75-104 degrees (fore/aft aircraft coordinate system), at a rate of 40 degrees per second. Independent control of the three VAVBN actuators provides the capability to vary the nozzle throat area independent of the vector angle. VIGV and VAVBN area variation are both used to control LiftFan performance, manage the LiftFan stall margin, and minimize thrust- thrust split coupling effects. Thrust split is defined as the ratio of main engine thrust over lift fan thrust, typically used to represent the propulsion system pitching moment applied to the aircraft. Image 6 F-35 VAVBN as seen from below. 5. Roll Post Nozzle Development The F-35B STOVL lift system uses roll nozzles in each wing to provide roll control in powered-lift operation. The roll nozzle controls thrust by varying the nozzle area using two hinged flaps. Unlike the reaction control systems on legacy vertical and/or short takeoff and landing (V/STOL) aircraft, the F-35 roll posts produce about 10 percent of the vertical thrust through redirected engine fan air. The port and starboard side roll post systems are part-number common and interchangeable, providing improved maintenance flexibility. Actuation for the nozzle flaps is provided by a twin- motor, hydraulic, rotary actuator. External, hydraulically actuated aircraft doors on the underside of the wing are opened in powered-lift operation to provide an exit aperture for roll post thrust. A key challenge in transitioning to the F-35B was providing adequate roll control authority and rate for store asymmetries and fuel imbalance. The roll post nozzles were positioned as far outboard as the internal wing structure would allow to maximize the moment arm. Main engine fan air to the roll posts was increased to the extent possible while maintaining adequate flow to cool the exhaust liner. Architectural changes in full-authority digital engine control were made to minimize the time delay from roll moment command to roll nozzle actuator response. 6. 3BSM Development The original design for the primary nozzle on the ASTOVL was a two-dimensional single expansion ramp nozzle. In this design, one nozzle flap is longer than the other. The nozzle vectors the primary thrust by deflecting the upper Approved for public release 5/8/18, JSF18-365 25PDF Image | F-35 Air Vehicle Technology Overview
PDF Search Title:
F-35 Air Vehicle Technology OverviewOriginal File Name Searched:
F-35_Air_Vehicle_Technology_Overview.pdfDIY PDF Search: Google It | Yahoo | Bing
NFT (Non Fungible Token): Buy our tech, design, development or system NFT and become part of our tech NFT network... More Info
IT XR Project Redstone NFT Available for Sale: NFT for high tech turbine design with one part 3D printed counter-rotating energy turbine. Be part of the future with this NFT. Can be bought and sold but only one design NFT exists. Royalties go to the developer (Infinity) to keep enhancing design and applications... More Info
Infinity Turbine IT XR Project Redstone Design: NFT for sale... NFT for high tech turbine design with one part 3D printed counter-rotating energy turbine. Includes all rights to this turbine design, including license for Fluid Handling Block I and II for the turbine assembly and housing. The NFT includes the blueprints (cad/cam), revenue streams, and all future development of the IT XR Project Redstone... More Info
Infinity Turbine ROT Radial Outflow Turbine 24 Design and Worldwide Rights: NFT for sale... NFT for the ROT 24 energy turbine. Be part of the future with this NFT. This design can be bought and sold but only one design NFT exists. You may manufacture the unit, or get the revenues from its sale from Infinity Turbine. Royalties go to the developer (Infinity) to keep enhancing design and applications... More Info
Infinity Supercritical CO2 10 Liter Extractor Design and Worldwide Rights: The Infinity Supercritical 10L CO2 extractor is for botanical oil extraction, which is rich in terpenes and can produce shelf ready full spectrum oil. With over 5 years of development, this industry leader mature extractor machine has been sold since 2015 and is part of many profitable businesses. The process can also be used for electrowinning, e-waste recycling, and lithium battery recycling, gold mining electronic wastes, precious metals. CO2 can also be used in a reverse fuel cell with nafion to make a gas-to-liquids fuel, such as methanol, ethanol and butanol or ethylene. Supercritical CO2 has also been used for treating nafion to make it more effective catalyst. This NFT is for the purchase of worldwide rights which includes the design. More Info
NFT (Non Fungible Token): Buy our tech, design, development or system NFT and become part of our tech NFT network... More Info
Infinity Turbine Products: Special for this month, any plans are $10,000 for complete Cad/Cam blueprints. License is for one build. Try before you buy a production license. May pay by Bitcoin or other Crypto. Products Page... More Info
CONTACT TEL: 608-238-6001 Email: greg@infinityturbine.com (Standard Web Page)