Finns det en fördel utöver reglen om att vara cool för majoriteten av Star Wars-fartyget som har vinger?

Det är inte bara Regel av coolt. Huvudskälet är kylregeln. En sekundär orsak kan härledas till att detta möjliggjorde för fartyg att maximera lagringsutrymmet utan att begränsa vapenkapaciteten (liknande moderna flygplan). Slutligen tjänar S-folierna i vissa Legends-artiklar syftet att stabilisera atmosfärisk flygning.

Från Arc-170

During battle, the craft's S-foils opened to expose heat sinks and radiators to help cool the ship, and the two main forward medium laser cannons located on the underside of its outer wings were uncommonly large and powerful.

Även från S-Foils

Notable model to have S-foils was the T-65B X-wing starfighter manufactured by Incom Corporation, posed a distinctive X shape when the S-foils were locked in attack position, which gave the laser cannons mounted on each wing a wider field of firing range.

Återigen från B-Wing

Two S-foils just below the engine on either side of the main airfoil could be extended to deploy twin laser cannons.4 It held a total of four laser cannons, and was also armed with proton torpedoes and ion cannons

Från ETA-2

S-foils, that were opened to shed excess heat from the ship's engines. The radiator wings were primarily opened during intense combat.4

Från Delta 7B

The Delta-7B also had a set of pop-out S-foils that could be extended for certain flight maneuvers