Can the four-engined Lockheed JetStar II fly on one engine? As we know, there are no four-engined business/private jets currently in production. Some Dassault Falcon models are actually trijets, but this is not the case. The only four-engined business jet in serial production was Lockheed JetStar line.

I'm wondering, in case of extremely rare emergency event, when 3 out of 4 16.5kN TFE7313 engines shutdown, could JetStar constantly fly on some flight level without loss of altitude using only one engine?
I have 3000 hours in jetstar.... The answer is no... It will not fly on one... Two yes and you really don't need that much rudder.. In the simulator with two out I used to put the inboard operating engine at 98% and modulate the outboard engine to control speed/sink doing that it really only needed 1/4 rudder trim