The Lawrence Sperry Aircraft Co. of Farmingdale, NY, manufactured the "WBB" engine in 1919.

- It was a 38 HP, four-cylinder, air-cooled V-engine with a two-stroke cycle, designed by Harold Wills.

From Appendix A5/6: Lawrence B. Sperry was the son of Elmer A. Sperry, the inventor of gyroscopes, which have become a benchmark for high quality, as well as his autopilots, etc.

- The 38 HP engine mentioned in the main text is not the one shown here, which is installed on an aircraft designed by the same company.

- Its main feature is a ski landing gear.

- The engine shown here is actually a Lawrence (LawrAnce, with an A, to avoid confusion). It is a three-cylinder radial engine. See the chapter on Lawrance.

“L.B. Sperry’s Farmingdale Trials” (PeT)