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Aviation History
1961
1961 - 1711.PDF
FLIGHT, 23 November 1961 817 An increasing number of DC-7Cs superseded by the big jets are being convened to DC-7F freighters. The one shown here belongs to Japan Air Lines Dimensions: Span, 117ft 6in; length, 108ft 11 in; height empty28ft 7in; wing area, 1,463 sq ft. Weights: Max take-off, 122,2001b; landing, 97,0001b- zero fuel91,0001b; capacity payload, 20,0001b. Payload accommodation: Cabin volume, 4,647 cu ft; baggage andfreight volume, 983 cu ft; cabin length, 84ft; max width, 9ft 10Mn- max height, 7ft tin; max usable floor area, 625 sq ft; dimensions o"f largestdoor, 3ft x 6ft; max seats, 100. Fuel capacity: 4,600 Imp gal (5,520 US gal). Performance: Typical cruising speed, 312kt (358 m.p.h.) at 24,200ftand 105,0001b; corres consumption, 420 Imp gal/hr; balanced field length, max take-off weight, SL, ISA, 6,060ft; at 5,000ft, ISA, 7,320ft at118,8001b; landing distance from 50ft, 5,520ft at 95,0001b- range B (max fuel), 3,770 n.m. (4,430 st.m.). DC-7B The DC-7B is similar to the DC-7 but is fitted with extratankage for long-haul overwater operation and is cleared for higher weights. The DC-7B first flew on April 25, 1955, and entered service withPan American less than a month later. A total of 110 DC-7Bs were built. The price of the DC-7B increased from about £680,000 in 1955 toabout £820,000 in 1957. Resale price today is very low. Powerplant: As DC-7. Dimensions: As DC-7. Weights: Max take-off, 126,0001b; landing, 102,0001b; zero fuel,96,0001b; capacity payload, 21,5161b; weight less fuel and payload 74,0001b. Pavload accommodation: As DC-7.Fuel capacity: 5.380 Imp gal (6,460 US gal). Performance: Cont cruising speed, 313kt (360 m.p.h.) at 24,300ft and l02.000lb; corres consumption. 420 Imp gal hr; balanced field lengthmax take-off weight, SL, ISA, 6,350ft;~ at 5,000ft. ISA, 7.650ft al l22,600lb; landing distance from 50ft. 5.950ft; range A (max payload)2.850 n.m. (3,280 st.m.); range B (max fuel). 4.275 n.m. (4,910 st.m.)- corres payload. 11.6001b; cofres cruise speed, 248kt (285 m.p.h.). DC-7C The DC-7 and DC-7B were criticized in service for theirrelatively high interior noise and vibration levels, which resulted from the 3.250 b.h.p. Wright compound engines in an airframe designedoriginally (as the DC-4) for units of 1,450 h.p. This led Pan American lo discuss with Douglas ways of improving the design while stretching iistill further to provide non-stop North Atlantic range. Ability to fly the North Atlantic routes non-stop on a high percentage of occasions in thecritical westbound direction against the strong prevailing winds had long been a major objective of all the competing Atlantic carriers, so thatthe DC-7C marked an important step forward both operationally and commercially. Douglas developed the DC-7C from the DC-7B in theshort space of about a year, extending the wing by the insertion of an additional 10ft of centre section. Altogether 121 DC-7Cs were sold.This was the last stretch of the famous DC-4'7 series. The DC-7C finally went out of production late in 1958 at the same time as the DC-6B; 1 1*7are still in service with 12 airlines. The DC-7C cost about £800.000 in 1956 and increased to about £930.000 by 1958. Resale price today is verymuch lower. Flight description: July 6. 1956, page 51. Powerplant: Four Wright R-335O-988 TC-18 EA-4 Turbo-Compoundsof 3,400 b.h.p. driving four-bladed Hamilton Standard 14ft propellers. Dimensions: Span, 127ft 6in; length, 112ft 3in; height empty.31ft lOin; wing area, 1.637 sq ft. Weights: Max take-off, 143,0001b; landing. 111.0001b; zero fuel.101.5001b; capacity payload, 23.3501b; weight less fuel and payload, 82.0001b. Payload accommodation: Cabin volume, 4,863 cu ft; baggage andfreight volume, 1.149 cu ft; cabin length, 87ft 4in; max width, 9ft lOJin; max height, 7ft gin: max usable floor area. 654 sq ft; dimensions oflargest door. 3ft 6ft; max seats, 100. Fuel capacity: 6,515 Imp gal (7,810 US gal). Performance: Cont cruising speed, 3O8kt (354 m.p.h.) at 23,500ft and110.0001b; corres consumption. 420 Imp gal'hr; balanced field length, max take-off weight, SL, ISA. 6,400ft; at 5,000ft. ISA, 7,690ft at136.8001b; landing distance from 50ft. 5.450ft at 109,0001b; range A (max payload). 4.000 n.m. (4,600 st.m.); range B (max fuel), 4,900 n.m.(5.630 st.m.); corres payload, 15,3OOIb; corres cruise speed. 238kt. FRO/VT 126 - ft EAR 745-, FRONT FREIGHT HOLD 690 CM.-ft
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