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 Convair 640
 Technical Specifications
 
 
        
          
            | First Flight: | August 20, 1965 |  
            | Number Built: | 27 converted from CV-340/440 |  
            | Length: | 79 feet 2 inches |  
            | Wing Span: | 105 feet 4 inches |  
            | Height: | 28 feet 2 inches |  
            | Max Take-Off Wt.: | 55,000 lbs. |  
            | Max Landing Wt.: | N/A |  
            | Empty Wt.: | 27,760 lbs. |  
            | Max Cruising Speed: | 300 mph   261 kts |  
            | Normal Cruising Speed: | 300 mph   261 kts |  
            | Approach Speed: | 150 mph   130 kts |  
            | Landing Speed: | 125 mph   110 kts |  
            | Stall Speed: | 97 mph     84 kts |  
            | Service Ceiling: | 23,000 feet |  
            | Fuel Capacity: | 2540 US gallons |  
            | Range: | 3005 miles |  
            | Fuel Type: | Jet A |  
            | Fuel Consumption: | 386 gph both on climb-out 254 gph both @ cruise
 286 gph both flight plan burn
 |  
            | Engines: | 2 Rols-Royce Dart RDa10 Mk542-4  rated @ 2750 eshp
each |  
            | Seating: | 56 Passengers |  
            | Crew: | 2 Pilots and 2 Flight Attendents |  
        
          
            | Engine Specifications |  
            | Rolls-Royce
Dart RDa10 Mk542-4 |  
        
          
            | Type: | Axial-flow prop-jet |  
            | Diameter: | N/A |  
            | Length: | N/A |  
            | Compressor Stages: | N/A |  
            | Turbine Stages: | N/A |  
            | Weight: | N/A |  
            | Starter: | Air-frame furnished |  
            | Fuel Grade: | Jet A |  
            | Estimated Shaft Horse Power: | 2750 eshp each |   
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