Schweizer S333

The Schweizer S‑333 is a lightweight, single‑engine helicopter developed by Schweizer Aircraft Corporation, later known as Schweizer RSG, in the early 1970s. Originating from the successful Schweizer 300 series, the S‑333 was introduced in 1978 as a purpose‑built trainer and utility machine, leveraging advances in rotor technology and a more powerful Lycoming HIO‑360‑C1A engine. Its five‑bladed main rotor and fully articulated hub give the aircraft excellent stability, low vibration, and a wide center‑of‑gravity envelope, making it ideal for flight‑training, law‑enforcement, and agricultural work. The S‑333’s airframe incorporates a semi‑monocoque aluminum structure with a spacious cabin that can be configured for two seats side‑by‑side or a single pilot with optional cargo kits. Over 400 units were produced before production shifted to the Sikorsky S‑300C line, but the S‑333’s design legacy lives on in modern light helicopters such as the Sikorsky S‑333/300C and the Schweizer 300 series. Its reputation for reliability, ease of maintenance, and forgiving handling has cemented the S‑333 as a benchmark in the evolution of cost‑effective rotorcraft, influencing training programs worldwide. Today, many flight schools and private operators still value the S‑333 for its proven performance and low operating costs.

Schweizer RSG

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