Idealia was America's first diesel powered yacht built and owned by the Electric Launch Company (ELCO).

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.

[5] On 22 October 1913 under ELCO corporate manager Henry R. Sutphen Idealia performed a trial on the Hudson River witnessed by naval engineers and architects on a run of about sixty miles from the Columbia Yacht Club at 86th Street to Croton Point and back.

[4][6][7] Notable in the trial was the operating economy of the diesel compared with the steam and particularly the gasoline engines in common use.

[1][4][8][9] Idealia first appears in the Forty Seventh Annual List of Merchant Vessels of the United States, 1915, with official number 213497, signal letters LDNM, port of registry New York, and owned by ELCO.

One advantage noted in reviews was that the diesel engine was compact and occupied little space with that compartment behind the galley beyond a watertight bulkhead.