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- "Set S-foils into attack position."
S-foils, also known as Strike foils or Stability foils and, on occasion, as X-foils, were movable wings attached to the port and starboard sides of a starship, sometimes mounted with weaponry. Normally, the foils were locked in a "closed" position close to the ship for landing and usually for normal flight, but during high-stress situations, the foils were folded out. The Incom Corporation manufactured several starfighters with S-foils, including the ARC-170 starfighter and, later, the X-wing starfighter.
Historically, S-foils had been developed to address overheating issues on wing-based starfighters. Because of the proximity of engines and weapons systems to narrow wiring that fit inside the thin wings, an excess of heat could cause mechanical meltdowns that would be devastating to the fighters' capacity to function. S-foils like those seen on a number of Republic starfighter models during the Clone Wars held radiator panels that dispersed heat and cooled the ships' interior mechanisms. S-foils were used when stress was being put on a ship's systems, usually when it was traveling at high speeds or locked in a dogfight. This idea would eventually evolve into the radiator panels of the Galactic Empire's TIE Series.
Stabilization was a key issue, especially with larger craft. For shuttles, which were often used to transport dignitaries or sensitive cargo, maintaining stability in flight was pivotal. Large folding wings served to reduce turbulence and protect the craft's contents.
With the advent of newer starfighters like Incom's X-wing, the workhorse of the Alliance Fleet during the Galactic Civil War, S-foils took on a new purpose. Designers realized that they could increase spread coverage of weapons if they mounted them at the tips of the foils. Unfortunately, the new design had the side effect of decreasing the reaction time of patrol fighters. On most models with S-foil mounted laser cannons, the weapons could not fire with the foils in locked position. As such, a pilot would have to switch to attack mode before they could defend themselves. Even in fighters where that was not the case, accuracy was usually improved with the S-foils in attack position.
Starfighters with S-foilsEdit
- Alpha-class Xg-1 Star Wing
- Aurek-class tactical strikefighter
- Basilisk war droid (later Mandalorian variants)
- StarViper-class attack platform
- Delta-7 Aethersprite-class starfighter (Saesee Tiin's modified starfighter)
- Eta-2 Actis-class interceptor
- V-19 Torrent starfighter
- Aggressive ReConnaissance-170 starfighter
- Sentinel-class landing craft
- Delta-class JV-7 escort shuttle
- Imperial assault shuttle
- Imperial loader shuttle
- T-65 X-wing starfighter
- T-65B X-wing starfighter
- T-65BR X-wing reconnaissance starfighter
- T-65XJ X-wing starfighter
- T-65XJ3 X-wing starfighter
- B-wing starfighter
- TIE Hunter
- Z-95 Headhunter (variant model)
- X-83 TwinTail starfighter
- CF9 Crossfire starfighter
- GAT-12 Skipray Blastboat
Behind the scenesEdit
- A Guide to the Star Wars Universe
- Star Wars: The Roleplaying Game
- The Star Wars Sourcebook
- Starfighter Battle Book: X-wing vs TIE Interceptor
- Galaxy Guide 5: Return of the Jedi
- Dark Empire Sourcebook
- Star Wars Sourcebook, Second Edition
- Galaxy Guide 1: A New Hope, Second Edition
- The Essential Guide to Vehicles and Vessels
- The Thrawn Trilogy Sourcebook
- Shadows of the Empire Sourcebook
- Star Wars: The Roleplaying Game, Second Edition, Revised and Expanded
- Star Wars: Rogue Squadron: The Official Nintendo Player's Guide
- Star Wars: Rogue Squadron II: Rogue Leader: The Official Nintendo Player's Guide
- Rebellion Era Sourcebook
- The New Essential Guide to Weapons and Technology
- Starships of the Galaxy, Saga Edition
- Scum and Villainy
- The Complete Star Wars Encyclopedia
- Legacy Era Campaign Guide
- LEGO Star Wars: The Dark Side (Non-canonical source)
- Star Wars: Imperial Handbook: A Commander's Guide