Control with the aid of the lever is somewhat rough; for finer control the pilot uses a handle on the left lever. This handle governs the tips of the jet nozzles. The tips (jetavators) are spring-opposed and can, with the aid of the flexible thrusts, be slanted forward or back. The pilot inclines the handle forward or back and slants both nozzle tips at the same time to fly straight. If pilot must turn, he turns handle, to slant the nozzles in opposite directions, one forward, another back, turning the pilot and the pack around its axis. By the combination of different motions of lever handles the pilot can fly any way, even sideways, to turn, rotate on the spot, etc.