UPDATED CONTROLS
AG1+VTOL down: Ramp-door operation
AG2+VTOL up: Flaps operation
AG3+VTOL down: Spoilers (airbrakes) activation
AG4: Air re-fueling Pods Jettison
AG5+VTOL up: Air Re-fueling systems extension and corresponding light operation
AG6: Landing/Taxi lights
AG7: Navigation/Anti-collision lights
AG8: No1 and No4 engines (outward) operation
Air To Ground Mode + Rocketpod: Chaff and flares dispenser
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WARNING 1: NO GROUND OPERATION OF REFUELING EXTENSION SYSTEMS !!!
WARNING 2: NO REVERSE OPERATION OF AG1 AND AG5, DUE TO DAMAGE HAZARD !
WARNING 3: NO ROCKETPOD USE IN GROUND OR WHEN REFUELING SYSTEMS ARE EXTENDED !
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AIR-REFUELING PROCEDURE
-Throttle 23%
-Trim Full Aft
-Flaps Full Down (AG2+VTOL up)
-Recommended Altitude 7.000 – 12.000ft and Airspeed below 320mph
-When the aircraft is stable, wings level and slight or no altitude change, then:
-Fuel Boom Extension (AG5+VTOL up)
-Then de-activate AG2 & AG5 and press AUTOPILOT MODE. The aircraft will be stabilized at a constant altitude with the refueling systems deployed.
-Minor changes to throttle and trim inputs may be needed in order to maintain level flight.

Now sit back and enjoy your KC-54 Gaur roaming through the skies ready to re-fuel the incoming "thirsty" fighter jets.
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The KC-54 Gaur is an upgraded model of the C-52TS Combat Gayal aircraft. The development of the KC-54 has been implemented through the successful Operational Feedback Program (OFP) of the existing C-52 fleet and by the rising needs for air-to-air refueling of the current and new users of the aircraft. It is equipped with state-of-the-art combat optronics systems for complete autonomous battlefield support, an integrated electronic warfare system and is certified for refueling almost every aircraft suited with a probe or a receptacle.
The KC-54 Gaur is a Multi-Role Tactical Airlift aircraft (MRTA) and it is designed as a multi-role air-to-air refueling, heavy cargo transport and battlefield support aircraft. For air-to-air refueling missions the KC-54 Gaur can be equipped with a combination of any of the following systems:
-Joint Aerial Refueling Boom System (JARBoS) for receptacle-equipped receiver aircraft.
-Mk.44D Tactical Air-refueling Pod in under-wing pylons for probe-equipped receiver aircraft.
-Universal Aerial Refueling Receptacle Slipway Installation (UARRSI) for self-in-flight refueling.
The KC-54 has a maximum fuel capacity in tanker mode of 300,000 lbs (136.000kg) without the use of additional fuel tanks, which leaves space for the carriage of 45,000 kg (100,000 lb) of additional cargo. The KC-54’s wing has common structure with the previous C-52 models with reinforced mounting locations and provision for fuel piping for the use of 2 hardpoints for the under-wing refueling pods.
The new KC-54 cabin can be modified to carry up to 320 passengers in a single class configuration, allowing a complete range of configurations from maximized troop transport to complex customization suitable for VIP and guest missions. Available configurations include 300 passengers in a single class and 250 passengers in two classes. The KC-54 can also be configured to perform Medical Evacuation (Medevac) missions; up to 150 standard stretchers can be carried. The main deck cargo configuration allows carriage of standard commercial containers and pallets, military, ISO and NATO pallets (including seats) and containers, and military equipment and other large items which are loaded through a cargo door. Like the previous C-52 variants, includes two lower deck cargo compartments (forward and aft) and a bulk area capability. The cargo hold has been modified to be able to transport up to 11 military pallets in addition to civilian Unit Load Device (ULD). Conversion from tanker mode (TM) to Cargo Mode (CM) can be performed in less than 2hrs by specialized ground crew.
The KC-54 Gaur is positioned as an intermediate size and range between the A400M Atlas and the C-17 Globemaster III, carrying cargo too heavy for the A400M while able to use rough landing strips. It has been advertised, from company sources, with the tagline "transport what the A400M cannot to places that the C17 can’t".
The upgrades included in the aforementioned OFP are:
-Better deck space management and use of synthetic material in the inside of the aircraft in order to augment the payload capability in Cargo Mode to 150.000lbs (68.000kg).
-A newer and more redundant tactical flight management system with more powerful Mission Computer Modules.
-A totally upgraded electronic counter-measure system with sensors and antennas throughout the fuselage.
-A next-generation Chaff and flares dispenser (AN/ALQ-620 Citadel) with increased decoys storage.
-Development, construction and certification of the new Tactical Air-refueling Pod Mk.44D.
-Structural enhancement of the aft fuselage in order to accommodate the JARBoS module and its cabling and fuel-pipe retrofit.
-Re-designed tail plane for enhanced airdrop stability.
-Addition of receptacle re-fueling point just behind the existing refueling probe for optimum mission accomplishment.
-Addition of winglets on the main wings for better fuel efficiency (4% less fuel consumption as indicated by the flight tests).
-Re-mastered aft ramp-door with stronger hydraulic actuators and more robust construction in order to load heavier cargo (i.e. Main Battle Tanks or Assault Vehicles)
-New FADEC software for more detailed and more durable power control, even in situations of triple engine failure.
-Re-engineered cockpit layout taking into account CRM suggestions and battle efficiency assessments.
-New lights (both navigation and taxi/landing), certified for NVG operations and night air-refueling operations under any weather conditions.
-Formation/approaching/position stripes with luminous coating, which provides long-term low-intensity illumination in the dark for air re-fueling missions and closed formation flights.
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New Capacity Specs after the OFP upgrades:
-80 paratroopers or
-110 troops with palletized and sidewall seats or
-40 troops with sidewall seats (allows 11 cargo pallets) only or
-30 litters and 50 ambulatory patients and medical attendants with complete medical equipment
-a Main Battle Tank and three Armored Vehicles, or five Armored Security Vehicles
-2 medium-sized Military helicopters (i.e. UH-60 Blackhawk or AH-64 Apache)
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KC-54 Gaur
Anytime! Anywhere! Anything…
The Next-Gen tactical airlift platform from -JintAC-
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Initial C-52TS Combat Gayal link: https://www.simpleplanes.com/a/scg9BL/C-52TS-Combat-Gayal
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Many credits to @Johndfg for his original Kawasaki C-2 design that I used as a development platform. Keep up the good job mate!