Douglas DC-7B
|
| First Flight: | April 21, 1955 |
| Number Built: | 112 were built for commercial use |
| Length: | 108 feet 11 inches |
| Wing Span: | 117 feet 6 inches |
| Height: | 28 feet 7 inches |
| Max Take-Off Wt.: | 122,000 to 126,000 lbs. |
| Max Landing Wt.: | N/A |
| Empty Wt.: | 58,150 lbs. |
| Max Cruising Speed: | 405 mph 352 kts |
| Normal Cruising Speed: | 359 mph 312 kts |
| Approach Speed: | 144 mph 125 kts |
| Landing Speed: | 132 mph 115 kts |
| Stall Speed: | 97 mph 84 kts |
| Service Ceiling: | 28,400 feet |
| Fuel Capacity: | 6490 US gallons |
| Range: | 5164 miles w/maximum fuel load
3565 miles w/maximum payload |
| Fuel Type: | 115/145 octane |
| Fuel Consumption: | 451 gph 4 engine flight plan burn w/max fuel
654 gph 4 engine flight plan burn w/max load |
| Engines: | 4 Wright R-3350 turbo-compound rated at
3250 HP each |
| Seating: | 64 to 95 passengers |
| Crew: | 3 Pilots 2 Flight attendents |
Engine Specifications
|
| Type: | 18 cylinder air cooled radial |
| Diameter: | 61.2 inches |
| Length: | 89.53 inches |
| Bore: | 6.125 inches |
| Stroke: | 6.312 inches |
| Displacement: | 3350 cubic inches |
| Compression Ratio: | 6.7 to 1 |
| Dry Weight: | 3514 lbs. |
| Ignition: | Scintilla DLN-9 |
| Fuel Grade: | 115/145 octane |
| Carburation: | Stromberg PR-58T1 |
| Performance: | Take-Off Power 3250 HP @ 2900 rpm
Normal Power 2600 HP @ 6500 ft |
| Remarks: | The R-3350-30W is a compound version of the R-3350-26W using 3 small turbines driven by exhaust gas and connected by fluid couplings to the crankshaft. This increases the take-off power to 3250 HP. |