Wait a second...Isn’t the OV-10 a “JATO” plane with Jet Assisted Take-Off capabilities? Are you saying that the props are strictly jet engine-driven via turbo shaft output?
No, he is saying that it has turbine “jet” driven props. The term “prop-jet” is commonly used to describe turboprop aircraft. Mostly by people with an inferiority complex because they are still flying a prop driven aircraft.
https://en.m.wikipedia.org/wiki/Garrett_TPE331
No idea about Jato capabilities, never saw that.
I have seen its engine though.