Another tip jet helicopter was the Sud-Ouest Djinn [1] from the 1950s.  This design was somewhat successful, with 178 units being built.  Unlike other tip jet designs, the Djinn used a fixed gas turbine to drive an air-compressor, and the blades were simply powered by compressed-air tip jets.  Since tip jet driven rotors don&#x27;t generate a lot of torque, the Djinn didn&#x27;t have a tail rotor.<p>[1] <a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Sud-Ouest_Djinn" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Sud-Ouest_Djinn</a>