Vaughn wrote:


It is very simple. Airplanes are classified as single-engine or
multi-engine. The classification says nothing about number of props.

You may make the argument that a redundant "engine package"
containing two
engine blocks but only one set of engine controls for the pilot to manage
actually constitutes a single engine, but I would want to have that ruling
from the FAA in advance.

Vaughn

Which brings me to my question!
How 'bout a single turbine driving two props (preferable counter rotating)?
John