Which is the only flying coaster in the world to feature a vertical loop?

The only flying coaster in the world to feature a vertical loop is Starry Sky Ripper, also known as Sky Scrapper. This unique design allows riders to experience a sensation of flight as they are positioned face down. The vertical loop is a distinctive element that sets this coaster apart from others in the flying coaster category, which typically do not include such a feature due to the engineering challenges and safety considerations involved in turning riders upside down while in a flying position.

While the Great Bear is a well-known inverted coaster, it does not have a flying design. Flying Aces, although highly acclaimed, primarily focuses on airtime hills and swooping elements rather than incorporating a vertical loop. The Smiler, known for its numerous inversions, is also not a flying coaster and features different ride dynamics aimed at providing a different experience altogether. Thus, Starry Sky Ripper is the sole flying coaster recognized for its inclusion of a vertical loop, making it a significant attraction in the world of roller coasters.