Idealia was America's first diesel powered yacht built and owned by the Electric Launch Company (ELCO). The yacht was built in 1911, launched in 1912 and demonstrated the potential for use of diesel engines in yachts for several years thereafter. She yacht performed a public trial on the Hudson River on 22 October 1913 under the supervision of ELCO's manager Henry R. Sutphen with a gathering of naval architects and engineers as observers. Idealia was sold to individual owners after its period of demonstrating the diesel engine's pleasure craft utility.