These engines were not exclusively dedicated to aviation, but were primarily used in automotive applications, specifically in American dragsters, as a way to achieve specific overpower.

“Turbonique Maintenance Manual”

“Two Turbonique Engines on a Go-Kart”

-The Turbonique company operated from the 1960s to the early 1970s. Among its products and applications, we find two types of engines: the S series and the T series.

“Turboshaft variant with spherical generator”
(photo Old-minibikes.com)

-The turboshaft variant was applied directly to the differentials of dragsters, racing cars for acceleration on very short tracks.

-The announced applications include pure jet Go-karts, as we can see. It mentions their application on two-seat VTOL (Vertical-Take-Of-Landing) vehicles and also on Gyrocopters.

"Turbonique Range" (from the catalog)

-Turbonique used a liquid monopropellant fuel for its engines—sometimes used as gas generators—and it was "Thermolene." It produced engines ranging from 24 to 360 pounds of thrust.

-They could spin propellers up to 6,000 rpm. Many customers used air/kerosene mixtures that could deliver up to 300 psi, which were readily available and cheaper. Thermolene was not a particularly efficient or powerful product.

-The S series were rocket engines, while the T series were turbojets with centrifugal compressors and impulse turbines.