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About 240 aircraft modified from Convair 240 (Convair 600) and Convair 340 / Convair 440 (Convair 640) with the Rolls-Royce turbo-props installed.
| MODEL | Convair 640 |
| CREW | 2-3 |
| PASSENGERS | 49-56 |
| ENGINE | 2 x Rolls-Royce RDa. 10/1 Dart turbo-prop, 2256kW |
| WEIGHTS |
| Take-off weight | 25855 kg | 57001 lb |
| Empty weight | 13733 kg | 30276 lb |
| DIMENSIONS |
| Wingspan | 32.11 m | 105 ft 4 in |
| Length | 24.84 m | 81 ft 6 in |
| Height | 8.59 m | 28 ft 2 in |
| Wing area | 85.47 m2 | 919.99 sq ft |
| PERFORMANCE |
| Cruise speed | 465 km/h | 289 mph |
| Ceiling | 6000 m | 19700 ft |
| Range w/max.fuel | 3138 km | 1950 miles |
| Range w/max.payload | 1979 km | 1230 miles |
| roger moore, rv4drvr(@)aol.com, 21.06.2008 Flew the 640 at Hawaiian Airlines in 1966-1967 and it was a nice ride. Never remember having any trouble with the conversion. Seems it was considerably faster than the 440. |
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