Sikorsky AUH/H-76 'Eagle' - Sikorsky's Answer to the Budget Apache

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Introducing
Sikorsky AUH/H-76 ‘Eagle’’
Turning an oil tycoon’s private helicopter into an Attack Chopper



Sikorsky AUH-76 during the 1982 Farnborough International

OVERVIEW

Disclaimer: Though this is nicknamed as the ‘Eagle’, Sikorsky has not actually named either the AUH-76 or H-76 version but was instead a nickname from the press. This proposal is also intended to be part of a Philippine subtree as the Philippines is the only operator of this vehicle.

The Sikorsky S-76 Spirit first flew in March 3, 1977 which was born out of the increasing popularity of the Agusta A109, Bell 222, and Aerospatiale SA-330 which were all made from military utility helicopters. This became such a hit in the civilian market that its production affected the production line for the UH-60 Blackhawk - which is where the S-76 is based from.

In 1978, the US Navy asked Sikorsky to join its Light Airborne Multipurpose System with which Sikorsky submitted along with the S-70B design was a militarized version of the S-76, which became the AUH-76 or H-76 ‘Eagle’. The US Navy however went to award the S-70B design stating that the S-76 was way too small as the Navy it wouldve hoped.


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15th Strike Wing that destroyed the Hueys that were about to strike the 1986 EDSA People Power Revolution

Stuck with a militarized chopper that was a civilized version of their military utility helicopter, Sikorsky tried to see if they can sell the chopper to export markets targeting specifically for counter-guerilla operations and they found a customer in 1983 with the Philippines buying 12 AUH-76 to form the 15th ‘Firebirds’ Strike Wing - and this remains the only armed variant ever sold.



H-76 of the Royal Thai Navy

Both Spain & Thailand bought H-76s but these were unarmed and were used for SAR & liaison duties instead (so theyre usually listed as S-76 in other sources). Sikorsky also offered New Zealand with an ASW version equipped with Sea Skua ASMs but no offer was made.



H-76N offered to the Royal New Zealand Navy

SPECIFICATIONS

Basically the AUH-76 and the H-76 are different designations in other sources but are both built in the same chassis (In Sikorsky’s own brochure, both are referred as just AUH-76). The difference being, the AUH-76 being the base version, then the H-76 being the upgraded version with a better engine and mast-mounted FLIR.

Characteristics Details
Displacement 4672 kg full load
Length 13.2 m
Height 4.42 m (to rotor)
Propulsion [AUH-76] - 2 x Allison 250-C30S turboshaft, rated at 509kW each
[H-76] - 2x Pratt & Whitney Canada (PWC) PT6B-36 turboshaft, rated at 716 kW each.
Speed 270 kmh
Range 1,000 nmi (1,900 km) at 15 knots (28 km/h)
Armament Details
Multipurpose Pylon System 2x - 4x Total Hardpoints
Machine gun or cannon pods
50mm / 70mm Unguided rocket pods
Antitank rocket launchers for TOW or Hellfire
Light antiship missiles such as the Sea Skua [proposed for the H-76N]
Light anti-aircraft missiles such as the Stinger
Electronics Hughes Mast-Mounted Sight or M65 TOW stabilized roof-mounted sight
Integrated Armament Management System



General Arrangement Drawing



Advanced Composites used on the S-76

PHOTOS

Spoiler

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AUH-76 with Mast-Mounted FLIR in the 1983 Paris Air Show





Philippine Airforce AUH-76 with unidentified armament (it does not look like a gun pod)


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SOURCES

https://www.airvectors.net/avs76.html

http://www.aviastar.org/helicopters_eng/sik_s-76.php
https://www.scramble.nl/planning/orbats/philippines/philippine-air-force-history

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