E-4 NOAC vs E-6 Mercury TACAMO
| American advanced airborne command post, launched during the Cold War, extensively employed for national emergency operations. | |
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| Origin country | 🇺🇸 United States |
| Category | Military Special Mission Aircraft |
| Manufacturer | Boeing |
| First flight | 1 January 1980 |
| Year of introduction | 1974 |
| Number produced | 4 units |
| Average unit price | $223 million |
| American command-and-control aircraft, operative during the Cold War era, kept primarily for communications with U.S. nuclear forces. | |
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| Origin country | 🇺🇸 United States |
| Category | Military Special Mission Aircraft |
| Manufacturer | Boeing |
| First flight | 19 February 1987 |
| Year of introduction | 1989 |
| Number produced | 16 units |
| Average unit price | $141 million |
| Wing area | 510.0 m² |
| Wingspan | 59.7 m ◉ |
| Height | 19.3 m ◉ |
| Length | 70.5 m ◉ |
| Maximum speed | 969 km/h ◉ |
| Operational range | 12,600 km ◉ |
| Service ceiling | 13,716 m ◉ |
| Max. takeoff weight | 374,850 kg ◉ |
| Empty weight | 190,000 kg |
| Total thrust | 4 x 23,814 kgf ◉ |
| Wing area | -- m² |
| Wingspan | 45.2 m ◉ |
| Height | 12.9 m ◉ |
| Length | 45.8 m ◉ |
| Maximum speed | 966 km/h ◉ |
| Operational range | 12,000 km ◉ |
| Service ceiling | 12,192 m ◉ |
| Max. takeoff weight | 155,128 kg ◉ |
| Empty weight | -- kg |
| Total thrust | 4 x 11,213 kgf ◉ |