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Douglas DC-7 Pilot's Handling Notes
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HANDLING THE ENGINES
The DC-7 has four 2450hp Wright R-3350-DA2 Cyclone TC18 engines which are fuel injected, two speed supercharged, and turbo compounded to give rated power up to 16400 feet. These are the most complicated piston engines to enter series production for civilian use and despite simplification for use in FS2002 their operation is complex. Each has 3250hp available for take off (at sea level) and for five minutes in case of emergency. METO power is 2650hp to 6,500 feet, however prolonged use in excess of 1910hp is discouraged and should be reserved for emergencies.
The constant speed propellers can be feathered and have reverse pitch. Automixture control is provided, but may be overidden.
During climb the primary power reference is MAP, but in the cruise the primary power reference is fuel flow.
The power required to cruise this aircraft economically depends on weight. Initial cruise may need to be at 1800hp per engine reducing to 1500hp at the end of a long flight. To achieve the most economical cruise condition as fuel (weight) reduces set the appropriate RPM and then adjust the throttles to achieve the stated PPH (per engine) using the fuel flow gauge. Intermediate values may be interpolated. If fuel economy is not paramount normal cruise MAP may be regarded as 37 inches at all weights adjusting only RPM in accordance with the schedule below.
WARNING - NEVER EXCEED 43 inches MAP after noise abatement or 41 inches MAP after climb complete.
Maximum fuel load is 35,830lbs of high density 145 Octane fuel.
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NOTE: This aircraft's real-world handling notes have been simplified for use with FS 2002
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