|Category:||Head-Up Display [HUD]|
|Object Type:||Display Unit|
|Object Name:||F-5 HUD Pilot's Display Unit|
|Division:||Airborne Display [ADD]|
|Year of Manufacture:||circa 1985|
|Location:||Rack RAA14 (HUD DUs) [Mezzanine Store]|
Pilots Display Unit
Dsgn Act K0656
Ser. No. K0656C004
Part No. 2501-00049.
Serial No. F500045
Mfr Code K6111
Mfr Part No. 039909
Cont No. F09603-84-G-1438/SA15
Optical Module Assy K0656
S/N K0656 004
Made up from miscellaneous parts. This unit is typical of designs for the F-5E/F.
Northrop built 792 F-5Es, 140 F-5Fs and 12 RF-5Es. More were built under license overseas: 91 F-5Es and -Fs in Switzerland, 68 by Korean Air in South Korea, and 308 in Taiwan. With this many aircraft there were numerous retrofit programmes and the Company supplied some 177 units for the F-5E/F.
In this aircraft the HUD is hard mounted to a pre-aligned mounting frame, i.e. it is already boresighted to the airframe. The drawback to the installation is that the HUD has to be long and narrow which is reflected in the design of the circuit boards within the unit. The High Voltage Power Supply locates on the underside of the PDU and there would be a Gun Camera and an Up-Front Control Panel fitted to customer requirements.
The Royal Thai Air Force (Kongtap Agard Thai) had received a batch of Freedom Fighters in the late 1960s. More advanced F-5Es and Fs followed in the late 1970s and early 1980s. In June of 1985, the Royal Thai Air Force began the upgrading of 20 of its F-5E/F’s, fitting Litton LN-39 INS, ALR-46 RWR, ALE-40 chaff/flare dispensers, and a GEC Avionics HUD/WAC . An additional 18 F-5E/Fs received a HUD and INS only.