Without an engine.

The conversion of a chemical or biochemical process to pilot scale and finally to production scale

Resembling or characteristic of an engine.

(dated) A man who operates, manages, and maintains an engine.

plural of engineman

plural of enginery

(archaic) Machinery made up of engines; instruments of war. / (archaic) The act or art of managing engines, or artillery. / (archaic) Any device or contrivance; machinery; structure or arrangement.

plural of engineeress

(dated, rare) A female engineer.

That can be (readily) engineered