U103335740: A page for the AN/APG-78 Longbow radar (found on the AH-64D and variants)

2023-10-29T20:51:27Z

A page for the AN/APG-78 Longbow radar (found on the AH-64D and variants)

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== Description ==


The '''AN/APG-78''' "Longbow" is an American [[Airborne Radars|airborne target detection (search) radar]] found on the AH-64D Apache Longbow and its variants. It has two modes, Ground-search mode (A-G) and Aerial-search (A-A) mode

=== Vehicles equipped with this radar ===


* {{Specs-Link|ah_64d}}
* {{Specs-Link|ah_mk1}}
* {{Specs-Link|ah_64d_japan}}
* {{Specs-Link|ah_64d_i_saraph}}

== General info / usage ==

''Add description about general use and more presets''

{| class="wikitable" style="text-align:center" width="50%"
! colspan="7" | Features
|-
! Band !! Pulse mode !! {{Annotation|PD|Pulse-Doppler}} mode !! {{Annotation|MTI|Moving target indication}} mode !! {{Annotation|IRST|Infrared search and track}} mode !! {{Annotation|TWS|Track-while-Scan}} mode !! {{Annotation|SARH|Able to guide semi-active radar-homing missiles}}
|-
| K || X || X || ✓ || X || X || X
|-
|}
{| class="wikitable" style="text-align:center" width="50%"
! colspan="7" | Search characteristics
|-
! Mode
! {{Annotation|Max range|The maximum possible range at which a target can be detected}}
! {{Annotation|Effective range|The maximum range at which a target can be detected with ~100% efficiency}}
! {{Annotation|Display ranges|The available range scale settings of the radar}}
! {{Annotation|IFF|Identification friend or foe}}
|-
| A-G || rowspan="2" | 8 km || rowspan="2" | 8 km || rowspan="2" | 4 km, 8 km || rowspan="2" | X
|-
| A-A
|-
|}
{| class="wikitable" style="text-align:center" width="50%"
! colspan="7" | Search modes
|-
! Mode
! Scan type
! {{Annotation|Azimuth|How far to each side the radar scans}}
! {{Annotation|Elevation|How far up and down the radar scans}}
! {{Annotation|Period|The time taken to complete one scan (the scan bar moving from one edge of the scan sector to the other)}}
|-
| A-G || rowspan="2" | Two-way raster || ±45° || -25°/+25° || 3 s
|-
| A-A || ±180° || -25°/+25° || 6 s
|-
|}

=== Comparison with analogues ===

The '''AN/APG-78''' has a large search zone compared to other helicopter radars, such as on the {{Specs-Link|mi_28nm}} and {{Specs-Link|ka_52}} (N-025 and RN01-Crossbow respectively). The {{Specs-Link|mi_28nm}}s N-025 has a search zone of 180° x 20°, while the {{Specs-Link|ka_52}}s nose mounted Crossbow has a search zone of 120° x 20°.

{| class="wikitable" style="text-align:center" width="50%"
! colspan="4" | Radars Found on Helicopters
|-
! Radar
! Search Zone
! Maximum Range
! Type
|-
| [[AN/APG-78]] || 360° x 20° || rowspan="2" | 8 km || rowspan="2" | Dome Mounted
|-
| N-025 || 180° x 20°
|-
| RN01-Crossbow || 120° x 20° || 12 km || Nose Mounted
|}

=== Pros and cons ===


'''Pros:'''
* Large search zone of 360° x 20°

'''Cons:'''
* Shorter range

== History ==


The [[AN/APG-78]] Longbow is a mast-mounted fire control radar (FCR) designated AN/APG-78. The FCR is a multimode millimetric wave (MMW) radar<ref name=":0">(Ian and Seabridge 345)</ref> The [[AN/APG-78]] FCR has four modes of operation, air-targeting mode, ground-targeting mode, terrain-profiling mode and a fourth monitoring mode that isolates electronic failures for maintenance and testing.<ref name=":0" /><ref name=":1">(Ian and Seabridge 346)</ref>

== Media ==
''Excellent additions to the article would be video guides, screenshots from the game, and photos.''

== See also ==


== External links ==
* [[wt:en/news/6638-development-ah-64-apache-the-rotary-chieftain-en|[Development] AH-64 Apache]]

=== References ===

;Citations
<references />

;Bibliography

* Moir, Ian, and Allan Seabridge. ''Military Avionics Systems''. Wiley, 2006.

[[Category:Aircraft radars]]

AN/APG-78 - Revision history

U103335740: A page for the AN/APG-78 Longbow radar (found on the AH-64D and variants)