UNITED STATES ARMY AVIATION CENTER FORT RUCKER, ALABAMA JUNE 2011 STUDENT HANDOUT TITLE: AH64D ENGINES AND RELATED SYSTEMS FILE NUMBER: 11-0909-4.0 (LOT13) PROPONENT FOR THIS STUDENT HANDOUT IS: COMMANDER, 110th AVIATION BRIGADE ATTN: ATZQ-ATB-ACD Fort Rucker, Alabama 36362-5000 FOREIGN DISCLOSURE RESTRICTIONS FD6 :. This product/publication has been reviewed by the product developers in.,, coordination with the USAACE Foreign Disclosure Officer, Fort Rucker, AL foreign disclosure authority. This product is releasable to students from foreign countries on a case-by-case basis. D-3
UNITED STATES ARMY AVIATION CENTER FORT RUCKER, ALABAMA STUDENT HANDOUT TITLE AH-64D FUEL SYSTEM NU-MBER: 11-0907-2.5 (LOT 13) PROPONENT FOR THIS STUDENT HANDOUT IS: COMMANDER, 110TH AVIATION BRIGADE ATIN: ATZQ-ATB-AD Fort Rucker, Alabama 36362-5000 FOREIGN DISCLOSURE STATEMENT: This product/publication has been reviewed by the product developers in coordination with the USAAWC Foreign Disclosure Authority. This product is releasable to students from foreign countries who have purchased the AH-64D model, but the IETM is NOT releasable. D-3
Figure 1. Communication System Architecture. a. The AH-64D Communication (COMM) System provides crew Intercommunications System (ICS); voice Warnings, Caution. and Advisory (WCA) tones within the aircraft; and radio communications, self-identification, and digital data links to the outside world. b. Secure encrypted communications are provided in the Ultra High Frequency (UH F), High Frequency (HF), and Frequency Modulation (FM) bands. Non-secure communications are provided by the Very High Frequency (VHF) radio and the Blue Force Tracker Aviation (BFT-AVN) Transponder (XPN DR) (digital data only). Voice and digital radio communication are available through each of the radios, allowing for reception and transmission of mission information. The majority of the components in the COMM System interface via the MIL-STD-15538 Multiplex (MUX) bus via channel one, buses A and B. c. The COMM System takes maximum advantage of the advanced processing environment of the helicopter to provide an integrated control and displays capability for the crewmembers. COMM mission parameters can be rapidly loaded into the system via the Data Transfer Unit (DTU), allowing for voice and digital networks to be quickly established. Digital signal processing in the Communication Interface Unit (CIU) provides low noise audio amplification, switching circuits, and automatic audio level control. d. The COMM System consists of the following systems: (1 ) ICS (2) AN/ARC-186(V) VHF-AM/FM radio system (VHF) (3) AN/ARC-164(V) UHF-AM Have Quick (HQ) 1 or 2 radio system (UHF) (4) AN/ARC-201 D No. 1 VHF-FM Single Channel Ground and Airborne Radio System (SINCGARS) (FM1) (5) AN/ARC-2010 No. 2 VHF-FM SINCGARS (FM2) D-4
(b} (c) (d) (e) (f) (g) Figure 13. AN/ARC-164(V) UHF-AM HQ1 or 2. The AN/ARC-164 UHF HQ 1 or 2 radio is an airborne command-andcontrol radio set, which provides two-way, LOS, UHF communications. It operates in the military UHF band from 225.000 to 399.975 MHz in 25 khz increments. The UHF radio also contains a separate guard receiver that is fixedtuned to the UHF emergency frequency of 243.000 MHz. The radio is capable of voice and data communications. in both plain and cipher text, in HQ Single Channel (SC) and Frequency Hop (FH) modes of operation. Secure communications capability is provided by the KY- 58/TSEC secure voice processor. The HQ function of the UHF radio provides jam resistance via an Electronic Counter-Countermeasures (ECCM) synthesizer module and its associated FH feature. This feature uses the instant tuning capability of the radio to provide this jam resistant capability. By using synchronized precision clocks, programmed frequency switching patterns, uniform FH rates, and common entry into the program, it is possible to make it very difficult for anyone to jam the communications. This capability, coupled with the security supplied by its peripheral KY-58 interface, provides for virtually invulnerable communications in the UHF band. The UHF radio is either a RT-1145F HQ 1 or a RT-1614 HQ 2 model radio. Both units are remotely mounted and are MIL-STD-1553B MUX bus compatible. The operating controls and indications are supplied by the OMS via the MPDs, KUs, and EUFDs. The AH-640 architecture provides for the implementation of either type of radio, despite the fact that the integration of each rad io is somewhat different. The primary SP can accommodate either type of radio and provides the appropriate controls and displays based on the type insta lled. D-16
------- Figure 26. AN/APX-123(CXP) IFF Transponder System (3) AN/APX-123 CXP IFF XPNDR System has the same capabilities as the APX-118 with the additional mode 5 capability. Mode 5 provides the following unique capabilities: (a) (b) (c) Mode 5, levels 1 and 2 are crypto-secure with enhanced encryption, spread spectrum modulation, and Time of Day (TOD) authentication. Mode 5, level 1 is similar to mode 4 information, but enhanced with an aircraft-unique Personal Identification Number (PIN). Mode 5, level 2 is the same as mode 5, level 1, but includes additional information such as aircraft position and other attributes. b. Three special functions are available to affect replies of modes 1, 2, and 3/A: the emergency function, the IDENT function, and the X-pulse function. ( 1) The emergency function is initiated by the operator to indicate that an emergency condition exists in flight. (2) The IDENT function can be selected by the operator for transmission for approximately 15 to 30 seconds and is used by air traffic controllers to distinguish between aircraft that are relatively close together in the control area. (3) The addition of an X-pulse in the replies is used to identify special vehicles such as pilotless aircraft. D-31