Hydromotor Delia (1916)
Michael de Cosmo in San Francisco, USA was an owner he and named her “Delia”
For a demonstration it was driven over the beach into the bay.
Speed land: 95 water: 16 km/h
It had a propeller driven by a PTO
The rudder was connected to the steering wheel.
Popular Mechanics February 1916 and Popular Science March 1916 had an article about this Amphib.
In the book “Mitt dem auto baden gehen” my friend Rene Pohl writes
that it was build by William Mazzei and William Purcell from Los Angeles.
Prototype Engine: Haynes
Production engine: Continental 6 cylinder diesel 35 hp
Rear axle is driven
Length: 4800 mm
Propeller 16 inch
An unknown number of vehicles was build between 1914 and 1917
In water mode the wheels where locked in forward direction
and the steering wheel turns only the rudder behind the propeller.