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Aviation History
1957
1957 - 1591.PDF
1 November 1957 679 Long-fuselage 707-120, drown at Seattle, April 19S6. Revised October 1957. 38 Leg hinged at end of forged rib 39 "Beaver tail" members top and bottom 40 Undercarriage retraction jack in walking-beam 41 Radius rod 42 Radius rod cracker-jack 43 Undercarriage drag-member 44 Doors on main leg 45 Double-folding mainwheel doors 46 Flap-drive shafting from hydraulic motors 47 Fillet-flap shafting (off inner-flap system) SPOILERS SHOV/N OPEN SKOND-CiASS WINDOW BETWEEN EACH FRAME UNDERFLOOR FREIGHT HOLD INWARD RETRACTING BOGIE UNDERCARRIAGE MULTI-DISt BRAKES HIGH-SPEED AILERONS DOUBU-SLOTTiD FLAPS LOW-SPEED AILERONS 48 Leading-edge inspection panels 49 Fuel tank end-ribs 50 Fuel system dry-bay (shut-off valves, defuelling connections and pressure switches) 51 Bonded stiffeners in trailing-edge surfaces 52 Honeycomb sandwich in traiiing- edge surfaces 53 Hot-air de-icing, double skin full length of leading edge 54 Spoiler operating jacks 55 Flap screw-jack 56 Flap tracks and rollers 57 Gust damper (70 m.p.h. limit) 58 Aileron/spoiler linkage 59 Low-speed aileron linkage 60 Intake to cabin-air turbo-com- pressor (engines 2, 3 and 4) 61 Outlet from turbo-compressor 62 Airflow through engine oil-coolers 63 Oil tank 64 Main engine mounting 65 Rear engine "steady" 66 Aluminium cowlings 67 Firewalls 68 Cove-lip door (covers gap when flaps up) 69 Fuel system surge-tank 70 N.A.C,A.-type inlet to tank vent system 71 Electrical racks (forced air cooled) 72 Two (independent) boost pumps in each main tank 73 Honeycomb-sandwich aileron skins 74 Typical wing section 75 Gravity fuel fillers 76 Pressure-refuelling dry boy 77 Cabin attendants' seats 78 Production break-lines 79 Wide-angle lens for freight-hold inspection 80 Tank access doors 81 Spring tab (full surface movement available for ground test) 82 Sundstrand-driven -40 kVA A.C. generators on engines 2, 3 and 4 83 Eight-seat lounge 84 Dividing screen (1st class forward, tourist aft) 85 Drinking fountain "3i 52-5 ' u BOEING 707-120 Four Pratt and Whitney JT3C-6 of 12,000 Ib sea level static thrust each (dry) Dimensions: Span, 130ft 10in; length overall, 134ft 6in ("short body"), or 144ft 4in ("long body"); height, 38ft 7in; gross wing area, 2,433 sq ft; track) 22ft 1in; wheelbase, 52ft 4in; max. fuselage cross-section, 170.5in high by 148in wide; tailplane span, 39ft Bin; distance from centre-line to engines, 27ft 2in (inners), 46ft 1 in (outers). Weights: Empty, about 109,700 Ib on -120; max. landing weight, 175,000 Ib; design gross weight, 248,000 Ib (taxi condition); payload, 41,800 Ib; equivalent i.s.w.l., 52,140 Ib (I.C.A.O. method). Performance: Take-off field length (long-range cruise with 200 n.m. alternate plus two hr reserve at 15,000ft, I.S.A. no wind), 5,900ft for 1,500 n.m. stage, 7,780ft for 2,500 n.m. and 10,500ft for 3,500 n.m.; normal cruising speed, 591 m.p.h.; landing field length, 6,420ft. BOEING 707-220 Four Pratt and Whitney JT4A-3 of 15,500 Ib sea level static thrust each (dry) Dimensions: Span, 130ft 10in; length overall, 134ft 6in; height, 38ft 3in; gross wing area, 2,433 sq ft; track 22ft 1 in; wheelbase 52ft 4in; max. fuselage cross- section, 170.Sin high by 148in wide; tailplane span, 39ft 8in; distance from centre- line to engines, 27ft 2in (inners), 46ft 1in (outers). Weights: Empty, 111,7001b; max. landing weight, 175,0001b; max. gross weight, 248,000 Ib; payload, 33,800 Ib. Performance: Field lengths, shorter than —120; normal maximum cruising speed, 608 m.p.h. BOEING 707-320 Four Pratt and Whitney JT4A-3 of 15,500 Ib sea level static thrust each (dry) Dimensions: Span, 142ft 5in; overall length, 144ft 4in; height, 38ft 8in; gross wing area, 2,892 sq ft; track, 22ft 1 in; wheelbase, 55ft 8in; tailplane span, 45ft 8in; distance from centre line to engines, 33ft (inners), 51ft 11^in (outers). Weights: Empty, "over 120,000 Ib"; max. landing, 195,000 Ib; zero fuel weight, 177,500 Ib; max. take-off weight, 295,000 Ib (296,000 Ib for taxying); payload, 38,000 Ib. Performance: Take-off field length (assumptions as for 707-120), 5,550ft for 1,720 st. m. stage, 6,850 for 2,900 st. m. and 8,550ft for 4,000 St. m.; normal cruising speed, 600 m.p.h.; landing field length, 6,400ft. BOEING 707-420 Four Rolls-Royce Conway 505 of 16,500 Ib sea level static thrust each Dimensions: As for 707-320. Weights: Manufacturer's empty weight, 121,468 Ib; operating empty weight, 128,314 Ib; max. landing weight, 195,000 Ib; zero fuel weight, 177,500 Ib; max. take-off weight, 295,000 Ib (296,000 Ib for taxying); payload, 38,000 Ib. Performance: Take-off field length, max. T.O. weight, 9,000ft; cruising speed at 200,000 Ib at 30,000ft, 585 m.p.h.; landing field length at 190,000 Ib, 6,280ft. BOEING 717 Four Pratt and Whitney JT3C-6 of 12,000 Ib sea level static thrust each (dry) Dimensions: As for 707-120. Weights: Design payload, 32,500 Ib; gross weight, "from 185,000 Ib." Performance: Range with maximum payload, 1,700 st. m.; range with full passenger payload (130 tourists), 2,400 st. m.; C.A.R. field length, max. weight, 5,400ft; landing field length (at 150,000 Ib), 5,500ft. 20 ' 0 500 1000 BOO 2000 2500 3000 3500 4000 1500 5000 5500 6000 RANGE stm Payload -range and cost curves tor the JT3- and JT4-engined 707-120 and 707-320. Assumptions for payload-range are: allowances for take- off, climb and acceleration (no credit for descent); still air, N.A.C.A. standard day; fuel reserves 17,000 Ib (320) and 16,000 Ib (120). Costs are to 1955 A.T.A. method (with no cargo, 7 yr depreciation, 750 hr engine overhaul, and V/2 hr fuel reserve), still air, long-range cruise technique, full passenger payload, standard day. From top to bottom: 320 (131 seats), 420 (131 seats), 220 (124 seats), 120 (124 seats).
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