Since the primary nozzles control both chamber pressure and axial thrust, the pintle control input should be computed to simultaneously maintain pressure and thrust distribution after first determining the ACS nozzles' control input.
Each DCS nozzle is controlled by the combination of independent pintle actuators.
To get a unique solution, an optimization problem as (11) can be suggested to minimize the pintle maneuver.
Let us assume that each pintle is moved by a dedicated piston actuator.
Alternatively, the proposed pintle actuator, which is more compact, has a pair of ball valves for controlling movement in the y/z directions, which always move together.
Then the pintle actuators will follow the movement of the pistons.
The Pintle Mount then evolved into a system tailored to the 12.7-mm Browning, since being adopted by the Royal Navy on its EH-101 Merlins.
To answer the numerous requests for militarised A109s, a specific pintle installation has been developed to allow the installation of a 7.62-mm machine gun on the helicopter window.
Overall the helicopter pintle mount business represents about ten per cent of Aerea's annual turnover, the company is also involved in the manufacturing of airborne weapon pods for helicopters and light aircraft.
Oto Melara's involvement in the pintle mount field is relatively new.
Oto Melara Heliborne Pintle Mount System has the gun mounted on the left side, a rail in the floor allowing to rotate the assembly towards the right for stowage.
The pintle mount developed by Oto Melara has been proposed to other NH90 users, Finland has expressed serious interest.