Air Force identified a requirement for an Advanced Tactical Fighter (ATF) to replace the F-15 Eagle and F-16 Fighting Falcon. Main articles: Advanced Tactical Fighter and Lockheed YF-22 ATF SPO Patch, 1990 The fighter's combination of stealth, aerodynamic performance, and mission systems enabled a leap in air combat capabilities and set the benchmark for its generation. While it had a protracted development and initial operational difficulties, the F-22 has become a critical component of the USAF's tactical airpower. Although the USAF had originally planned to buy a total of 750 ATFs, the program was cut to 187 production aircraft in 2009 due to high costs, a lack of air-to-air missions at the time of production, and the development of the more affordable and versatile F-35. The aircraft first flew in 1997 and was variously designated F-22 and F/A-22 before it formally entered service in December 2005 as the F-22A. The prime contractor, Lockheed Martin, built most of the F-22's airframe and weapons systems and conducted final assembly, while program partner Boeing provided the wings, aft fuselage, avionics integration, and training systems. As a product of the USAF's Advanced Tactical Fighter (ATF) program the aircraft was designed as an air superiority fighter, but also incorporates ground attack, electronic warfare, and signals intelligence capabilities.

And then offset the roof so that it sits on top of the rafters.The Lockheed Martin/Boeing F-22 Raptor is an American single-seat, twin-engine, supersonic all-weather stealth fighter aircraft developed for the United States Air Force (USAF). Make the roof 1” thick (or what the thickness of the desired roof system). To hide the rafters and beams you will need to modify the roof and make sure that the roof sits on to of the rafters and beams.But before we deal with that create a design option called “fascia” so that you can hide the beam that is at the edge of the roof. Un-isolate the roof rafters and beams, and you can see the rafters and beams through the roof.Do the exact same thing to the other sides of the roof to continue to have the rafter tail on all sides.At the bottom corners, you will need to make two straight line so that the rafters are perpendicular to the roof edge.Then using the “pick supports” and select one section of the roof beams. Make sure the 3D box id checked before selecting the beams. Go back to the structure tab and select the beam system tool.Select all of the beams you just placed and isolate the beams using the “isolate element”.Use the “pick lines” select the ridge, hips, valleys, and edges of the roof.Now, after selecting your desired beam, switch to the 3D view and before selecting lines to create the beam make sure the “3D Snapping” box is checked.Then load the desired structural framing family you would like to use. Select the structure tab and select the beam tool.Also, if you need to have a custom rafter tail end, you will need to modify both ends of the beam to your desired design. When creating rafter tails with a beam system, it can be difficult.

Rafter tails detail design