Embraer R-99 (EMB 145 AEW)

The regional jet transformed into an airborne command center

Overview

Embraer Brazil 1999–Present $80 million (2000)

The Embraer R-99, also known internationally as the EMB 145 AEW, adapts a commercial regional jet into a compact airborne early warning and surveillance platform. Developed to provide advanced radar coverage and command capability in a smaller, more economical airframe, it has become one of the most recognizable jet-based AEW systems outside the superpower fleets. Its flexibility has allowed it to serve in both military air defense and specialized monitoring roles.

Specifications

Units
Engine
2 × Rolls-Royce AE 3007A
Engine type
Turbofan
Thrust
2 × 7,420 lbf · 33 kN
Avionics
Honeywell Primus 1000, Erieye active electronically scanned array radar
Wing tips
No winglets
Seats
47
Crew
—
Cabin width
6 ft 11 in  ·  2.10 m
Cabin height
6 ft 0 in  ·  1.82 m
Cabin length
54 ft 2 in  ·  16.50 m
Exterior length
98 ft 0 in  ·  29.87 m
Tail height
22 ft 2 in  ·  6.76 m
Fuselage diameter
7 ft 7 in  ·  2.30 m
Wing span
65 ft 9 in  ·  20.04 m
Baggage volume
—
Gross weight
—
Empty weight
—
Max takeoff weight
48,500 lb  ·  22,000 kg
Max landing weight
42,500 lb  ·  19,300 kg
Max payload
12,800 lb  ·  5,800 kg
Fuel capacity
1,700 gal · 6,400 L · 5,100 kg (Jet A)
Max cruise speed
461 kt  ·  531 mph  ·  854 km/h
Maximum speed
—
Cruise speed
—
Approach speed
—
Range
2,000 nm  ·  2,300 mi  ·  3,700 km
Fuel burn
—
Ceiling
37,000 ft  ·  11,300 m
Rate of climb
2,600 ft/min  ·  13 m/s
Takeoff distance
4,550 ft  ·  1,380 m
Landing distance
4,600 ft  ·  1,400 m
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Embraer EMB-145AEWC

Operational Context

Embraer R-99 (EMB 145 AEW) — airborne early warning on a regional jet platform

The Embraer R-99 is a military derivative of the ERJ 145 regional jet, developed in the late 1990s to meet Brazil’s requirement for an airborne early warning and control aircraft. The program resulted in multiple mission variants, collectively known under the R-99 designation in Brazilian service and marketed internationally as the EMB 145 AEW or EMB 145 AEW&C.

The most prominent version, often referred to as the R-99A, is equipped with a dorsal radar array mounted above the fuselage. This radar system provides wide-area surveillance of airborne targets and supports command and control operations. Inside the cabin, operator consoles allow mission crews to monitor airspace activity, coordinate intercepts, and manage tactical information in real time.

A second major variant, commonly known as the R-99B, was configured for remote sensing and ground surveillance. This version supports environmental monitoring, border patrol, and reconnaissance missions through specialized sensors and data systems.

Powered by two Rolls-Royce AE 3007 turbofan engines, the aircraft combines jet cruise speed with relatively efficient operating costs. Its range and endurance allow extended patrol missions while operating from standard airfields without the infrastructure demands of larger airborne warning aircraft.

Exported to several countries, the R-99 family demonstrates how a commercial regional jet platform can be successfully adapted for advanced military surveillance roles. Its balance of capability, cost, and flexibility has made it a significant player in the global airborne early warning market.