AN/APG-78

Description

The AN/APG-78 "Longbow" is an American 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

• AH-64D
• AH Mk.1 Apache
• AH-64DJP
• Saraph

General info / usage

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Features
Band	Pulse mode	PD mode	MTI mode	IRST mode	TWS mode	SARH
K	X	X	✓	X	X	X

Search characteristics
Mode	Max range	Effective range	Display ranges	IFF
A-G	8 km	8 km	4 km, 8 km	X
A-A

Search modes
Mode	Scan type	Azimuth	Elevation	Period
A-G	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 Mi-28NM and Ka-52 (N-025 and RN01-Crossbow respectively). The Mi-28NMs N-025 has a search zone of 180° x 20°, while the Ka-52s nose mounted Crossbow has a search zone of 120° x 20°.

Radars Found on Helicopters
Radar	Search Zone	Maximum Range	Type
AN/APG-78	360° x 20°	8 km	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 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.

Media

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

External links

• [Development] AH-64 Apache

References

Citations

Bibliography

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