The Lockheed Model 9 Orion is a single-engined passenger aircraft built in 1931 for commercial airlines. It was faster than any American military aircraft of that time. Designed by Richard A. von Hake, it was the last wood aircraft produced by the Lockheed Aircraft Corporation.

The Lockheed Altair was a single-engined sport aircraft produced by Lockheed Aircraft Limited in the 1930s. It was a development of the Lockheed Sirius with a retractable undercarriage, and was the first Lockheed aircraft and one of the first aircraft designs with a fully retractable undercarriage.