YF-23 Black Widow II (Wallpaper 3)
Sunday, May 29, 2011
image dimensions : 1092 x 682
YF-23 Black Widow II (Wallpaper 3)
YF-23 Black Widow II fighter aircraft photo wallpaper gallery 3. YF-23 Black Widow II fighter aircraft pictures and images collection 3.
The YF-22 and YF-23 were different in many ways. The YF-23 was designed for speed and maneuverability. The YF-22, however, was designed more for maneuverability. Both aircraft, were designed for a type of flight called supercruise. Supercruise is when an aircraft is designed to be flown at Mach 1 or above in cruise, that is without afterburners. For this reason, both aircraft had to be more aerodynamic. The YF-23 was slightly more aerodynamic as it's cruising speed was Mach 1.25, Mach 0.08 faster than the YF-22 (roughly). Both of their speeds varied however. That is because the two prototypes were produced and tested. Each one was fitted with a different engine configuration. One prototype would be fitted with the Pratt & Whitney F119 powerplant and the other with the General Electric F120 powerplant. Both powerplants were roughly equal but the F120 was better suited to supercruise. YF-23 Black Widow II (Wallpaper 3). YF-23 Black Widow II fighter aircraft photo wallpaper gallery 3. YF-23 Black Widow II fighter aircraft pictures and images collection 3. Lockheed chose a somewhat conservative hybrid planform airframe layout for the YF-22, reminiscent of the F-15 and F/A-18, with closely spaced engines, long inlet tunnels, outward canted vertical tails and rudimentary strakes over the inlet boxes to promote vortex lift over the outboard wing sections. Northrop chose a far more radical airframe layout, driven by the objectives of stealthiness and supercruise. The extensively blended fuselage has rudimentary chines which smoothly blend into the wing leading edge, the blending allowing good area ruling and low supersonic drag. The low wing aspect ratio is used to optimise supercruise performance. The exhausts of the two aircraft differed radically. Lockheed chose a layout aimed at maximising lower speed manoeuvrability via the use of thrust vectoring, even though this was not a mandatory USAF requirement. Two dimensional thrust vectoring nozzles provide vectoring to enhance response in pitch. Northrop on the other hand rated stealth and drag so important they employed a serrated planform beavertail with B-2-like submerged ventral exhaust troughs. This approach reduced both depressed tail aspect infrared emissions and tail aspect radar cross-section, but precludes any vectoring. YF-23 Black Widow II (Wallpaper 3). YF-23 Black Widow II fighter aircraft photo wallpaper gallery 3. YF-23 Black Widow II fighter aircraft pictures and images collection 3.
YF-23 Black Widow II fighter aircraft photo wallpaper gallery 3. YF-23 Black Widow II fighter aircraft pictures and images collection 3.
The YF-22 and YF-23 were different in many ways. The YF-23 was designed for speed and maneuverability. The YF-22, however, was designed more for maneuverability. Both aircraft, were designed for a type of flight called supercruise. Supercruise is when an aircraft is designed to be flown at Mach 1 or above in cruise, that is without afterburners. For this reason, both aircraft had to be more aerodynamic. The YF-23 was slightly more aerodynamic as it's cruising speed was Mach 1.25, Mach 0.08 faster than the YF-22 (roughly). Both of their speeds varied however. That is because the two prototypes were produced and tested. Each one was fitted with a different engine configuration. One prototype would be fitted with the Pratt & Whitney F119 powerplant and the other with the General Electric F120 powerplant. Both powerplants were roughly equal but the F120 was better suited to supercruise. YF-23 Black Widow II (Wallpaper 3). YF-23 Black Widow II fighter aircraft photo wallpaper gallery 3. YF-23 Black Widow II fighter aircraft pictures and images collection 3. Lockheed chose a somewhat conservative hybrid planform airframe layout for the YF-22, reminiscent of the F-15 and F/A-18, with closely spaced engines, long inlet tunnels, outward canted vertical tails and rudimentary strakes over the inlet boxes to promote vortex lift over the outboard wing sections. Northrop chose a far more radical airframe layout, driven by the objectives of stealthiness and supercruise. The extensively blended fuselage has rudimentary chines which smoothly blend into the wing leading edge, the blending allowing good area ruling and low supersonic drag. The low wing aspect ratio is used to optimise supercruise performance. The exhausts of the two aircraft differed radically. Lockheed chose a layout aimed at maximising lower speed manoeuvrability via the use of thrust vectoring, even though this was not a mandatory USAF requirement. Two dimensional thrust vectoring nozzles provide vectoring to enhance response in pitch. Northrop on the other hand rated stealth and drag so important they employed a serrated planform beavertail with B-2-like submerged ventral exhaust troughs. This approach reduced both depressed tail aspect infrared emissions and tail aspect radar cross-section, but precludes any vectoring. YF-23 Black Widow II (Wallpaper 3). YF-23 Black Widow II fighter aircraft photo wallpaper gallery 3. YF-23 Black Widow II fighter aircraft pictures and images collection 3.
- YF-23 Black Widow II (Wallpaper 1)
- YF-23 Black Widow II (Wallpaper 2)
- YF-23 Black Widow II (Wallpaper 4)
Labels: YF-23 Black Widow II
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