Helio Aircraft’s story is a history of an unusually focused design: a light utility airplane intended to remain controllable at low speeds and use landing areas unavailable to many conventional aircraft. The Courier became the company’s defining product, serving civilian operators and military users while the business behind it experienced repeated ownership and production changes.
The source article and search results agree on the broad arc: Otto Koppen and Lynn Bollinger founded the Koppen-Bollinger Aircraft Corporation in 1948; the company developed the Helio Courier and produced it in…