Gas turbine propulsion power plant construction

Claim 1

A GAS PROPULSION UNIT FOR VERTICAL TAKE-OFF OR SHORT DISTANCE TAKE-OFF AIRPLANES, COMPRISING GAS-PRODUCING MEANS HAVING A LONGITUDINAL AXIS, A RELATIVELY FIXED HOUSING CONNECTED TO SAID GAS-PRODUCING MEANS AND INCLUDING SUPERSONIC NOZZLE MEANS HAVING AN INLET PORTION SUBSTANTIALLY ALIGNED WITH THE LONGITUDINAL AXIS OF SAID GAS-PRODUCING MEANS AND DOWNWARDLY DIRECTED SUBSONIC NOZZLE MEANS, AFTERBURNER MEANS PIVOTABLY MOUNTED WITHIN SAID HOUSING AND INCLUDING AN ESSENTIALLY ANNULAR CONDUIT, AND PIVOT MEANS TO PIVOTALLY MOUNT SAID AFTERBURNER MEANS UPON A RELATIVELY FIXED PART OF SAID HOUSING TO ENABLE PIVOTABLE MOVEMENT FROM A FIRST POSITION IN OPERATIVE RELATIONSHIP WITH SAID SUPERSONIC NOZZLE MEANS FOR PRODUCING A THRUST PRIMARILY IN THE FORWARD DIRECTION DURING NORMAL FLIGHT CONDITIONS INTO A SWING OUT POSITION IN OPERATIVE RELATIONSHIP WITH SAID SUBSONIC NOZZLE MEANS FOR PRODUCING A THRUST AIDING THE TAKE-OFF AND LANDING OF THE AIRPLANE.