双水獭DHC-7

KEY Structure and general 1 Forward baggage compartment— unpressurised, glass-fibre and balsa sandwich, 50 cu ft 2 Upward-hingeing baggage door, 30in x 26in 3 Direct-vision panels (both sides), also serve as emergency exits 4 Bonded doubler skin 5 " Z " section stringers bonded to skin 6 Built-up, notched fuselage frames— upper section constant I lOin diameter (3in deep) 7 Separate forged and machined window frames (lOin x I4in) bonded to skin 8 Lower fuselage frames of I24in diameter constant section (forms flattened off fuselage cross-section) 9 Fuselage chine member, (extruded and bonded) 10 Vertical supports form a keel the entire length of the constant fuselage section 11 Seat rail of the "Douglas track type" supports floor loads 12 Seat rails attached to the side walls 13 Floor panels of aluminium-faced sandwich, 75lb/sq ft maximum loading FLIGHT International, 7 June 1973 !4 Main wing/fuselage frames, forged and machined aluminium fixed "back to back" 15 Wing attachment strut (steel) tenoned and bolted to mainframe 16 Passenger airstair door, 70tn x 30in 17 Aft baggage compartment, 236 cu ft 18 Baggage-bay access door from cabin 19 Externa! loading door, 38in x 31 in 20 Cargo restraint net (optional) 21 Aft pressure bulkhead 22 Two web-plate frames with fin-spar attachments 23 Retractable tail bumper, hydraulic- ally actuated 24 Built-up flange-and-web aft fuselage frame 25 Drop-down tail cone (access to aft fuselage) 26 Fin-inspection access 27 Three-spar vertical fin 28 Fin leading edge (bird-proof), bonded close-pitch stiffeners 29 Fin ribs (total six) 30 Fin skin stiffeners bonded to skin 31 Two-element rudder, hydraulically actuated (bonded stringers) 32 Three-spar fixed-incidence tail- plane 33 Tailplane attachment bolts (total six) t-uut-ii international, / june IV/J (FyiKTC 34 35 36 37 38 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 Stringers bonded to skin Sealed two-piece elevators Elevator mass balance Detachable glass-fibre tips Wing/fuselage mounting pads (total eight) Wing—continuous two-spar tor- sion box Spar of built-up shear web and extruded caps, plus fail safe " T " extrusion Wing centre box Splice plate Wing joint-strap, forged and machined Machined ribs Built-up vertical and cross-braced ribs Upper and lower wing skin panels, taper rolled and bonded on extruded stringers Reinforced skin doubler plates Machined integral fuel-tank ends Fuel collector tank (two per wing) Tank-access panels (bonded alu- minium sandwich), top skin only Lead ing-edge ( f i xed sec t ion ) bonded stringers Leading edge (hinged section) Detachable glass-fibre wing tips Double-slotted flaps One-piece main flap Three-piece trailing flap Honeycomb reinforced top skin Fixed sealing plate Glass-fibre detachable flap-jack fairings Two spoilers per wing (for use on ground only), hydraulically actuated Four flight and ground spoilers per wing Aileron, built-up two-spar ribs and skin A i r -cond i t i on ing and ant i - ic ing A l High- and low-pressure engine bleeds to cabin air system A2 Shut-off valves A3 Venturi A4 Delivery manifold A5 Primary heat-exchanger core A6 Refrigeration, three-wheel unit (both sides) A7 Secondary heat exchanger (both sides) A8 Water separator A9 Ducts down to mixing chamber and fan A10 Ground air-conditioning con- nector (optional) A l I Cabin delivery ducts for con- ditioned air A I 2 Flight-deck window demisting ducts A I 3 Delivery duct to radar compart- ment A I 4 Controllable cold-air ducts A I 5 Ai r exit gri l l A16 Cabin-pressur isat ion con t ro l valve A I 7 Overboard dump A I 8 Pneumatic de-icing boots A I 9 Propellers and intakes, electri- cally de-iced A20 Wind shields, electrically anti- iced Key continued overleaf 890 D H C - 7 key continued from page 889 Flying controls C I Control wheels, incorporating t r im switches Rudder pedals and brakes Pitch-trim wheels (position indi- cators and back-up switch on centre console) Control cables run below floor Aileron loop Afleron splitter quadrant Aileron quadrant Spoiler servo, input signal from lateral control cable circuit Spoiler linkage Geared tab Trim tab Upper and lower rudder hy- draulic servo Trim actuator Feel spring Summing and linkage bars Trailing rudder push-rod linkage (top and bottom) Elevator bcllcrank Limit stops First torsion spring Second torsion spring Spring tab Trim-tab actuator Trim tab Flap lever on cockpit centre console Primary flap system hydraulic- drive unit Reversing gear box Flap drive shaft Recirculating ball-screw mech- anism (three per wing) Torque limiter (one per track) Flap slide member (one per wing) Inboard flap track focated inside wing fairing Emergency flap-arrester brake Hydraulic actuator (three per wing) rotates the aft flap (landing only) Flap radius rod Flap drive-shaft thrust link C2 C3 C4 C5 C6 C7 C8 C9 CIO CM CI2 CI3 CI4 CIS CI6 CI7 CIS CI9 C20 C2I C22 C23 C24 C25 C26 C27 C28 C29 C30 C3I C32 C33 C34 C35 Electrics and hydraulics El 20kVA alternator per engine E2 Electrically heated glass windows E3 Electrically driven screen wipers E4 Taxi lamp E5 Pitot tube, electrically heated (both sides) E6 Four-port static vents, electri- cally heated (both sides) E7 Forward and aft external emerg- ency flood lamps (both sides) E8 Landing lamp E9 Wing inspection lamp (both sides) EIO Dual navigation lights El I Upper, fin-mounted, anti-collision beacon (also lower beacon under- neath) EI2 Rear position light EI3 Cockpit roof panel includes elec- trical circuits EI4 Circuit-breaker panel EI5 39Ahr, 28V Ni-Cad battery (both sides) EI6 Two fully independent hydraulic systems at 3,000lb/sq in (twin pumps per engine) EI7 Reservoir EI8 Overflow tank and filters (also on right side) EI9 Hydraulic service bay (also on right side) E20 Aluminium alloy supply and return lines Fuel system Fl Integral fuel tank (total capacity 1,310 Imp gal, 1,574 US gal), non-cross feeding Collector tank (one per engine), housing boosterand ejector pumps Fuel-contents measurement units (five per tank) Over-wing filler Vent line Single-point pressure refuelling/ defuetling and contents panel (125 Imp gal/min, 150 US gal/min fuelling rate) External fuel line and crossfeed junction Water injection pressurised tank (depressurised in flight), capacity 12 Imp gal Furnishings LI Fully shrouded instrument panels L2 Upholstered flight cabin L3 Captain's fully adjustable seat L4 Co-pilot's fully adjustable seat L5 Flight-bag stowage both sides L6 50-seat four-abreast passenger cabin shown L7 L8 L9 LIO Lll LI2 LI3 Passenger service panel over each pair of seats Overhead coat racks incorpor- ating passenger address speakers Tinted cabin windows Fixed-back contoured seats with luggage-restraint rails Position of toi let on standard version (occupied by the addi- tional seats) Complete toilet compartment Compartment for hot cup units, attendant's folding seat Powerplant P4 P5 P6 P7 P8 P9 PIO P l l PI2 PI3 PI4 PI5 PI6 PI7 PI8 PI9 P20 P2I P22 P23 P24 P2S P26 Pratt & Whitney PT6A-50 turbo- prop engine Front dynamic suspension mount- ing Rear, lower dynamic suspension mountings Rear, upper suspension link Titanium firewalls Diagonal bracing Hinged, detachable access door Flap-support structure and aft fairing Engine gearbox Plenum chamber Engine oil filler and accessories bay Fireseal Engine oil cooler Snow-separator intake flap (flap is lowered in snow) Snow separator vane (vane is raised in snow) Engine ram-air intake, acoustically lined Quickly detachable engine cow- lings Hamilton Standard 24PF bladed I Ift 3in-diameter controlled propellers Propeller brake Glass-fibre spinner Aluminium blade spar Low-density foam filler Glass-fibre blade shell Nickel leading-edge sheath Engine cables run up bulkhead and along cabin roof Transmission from cable loop to flexible push-pull cables four- Beta- Radio and electronics R| Weather radar R2 Glideslope R3 MLS antenna (both sides) R4 Electronics bay R5 VHF com aerial FLIGHT International, 7 June 1973 R6 VOR aerial (both sides) R7 Cockpit voice recorder R8 Flight recorder R9 DME aerial RIO Collision-avoidance system aerial (provisional) R l l ATC transponder aerial RI2 Radio altimeters RI3 VHF/UHF aerial RI4 ADF sense aerials (both sides) RI5 ADF loop aerials RI6 Marker beacon aerial RI7 DME aerial RI8 Static discharge wicks Safety systems 51 Two-shot fire extinguishers (two each side) 52 Five compartments, three fire zones 53 Portable extinguisher located in flight deck and passenger cabin 54 Forward cabin emergency exits (type III 36in X 20in) inward opening 55 Aft cabin emergency exit (type I 53in x 24in) 56 Emergency oxygen system (crew members and ten per cent of passengers) Undercarriage U l Nosewheel steering control Rearward-retracting nose under- carriage Steering actuator Centring actuator Folding drag stay Retraction jack Twin nosewheels (braked on production aircraft) 6-5in X lOin tyre Main undercarriage support frame (built-up from forged and machined parts) Leg pivot trunnions Retraction jack for forward- retracting main undercarriage Drag strut Drag-strut support frame Down-lock strut Main undercarriage (twin wheels 32in x 11 5in tyres) U I 5 Large-diameter anti-skid brake units U I 6 Main undercarriage doors re- main open when the under- carriage is locked down U I 7 Centre door attached to main- leg U2 U3 U4 US U6 U7 U 8 U9 UIO U N U I 2 U I 3 U I 4 DHC-7 Span 93ft Oin(28.3m) Length 80ft 2in(24.4m) Height 26ft 1.7in(7.97m) 双水獭DHC-7 1.pdf 双水獭DHC-7 2.pdf 双水獭DHC-7.pdf