Pilot's Operating Handbook

panel and contains the throttle and mixture control. A friction lock on the right side of the quadrant prevents creeping of the controls. To the right of the quadrant is the carburetor heat con- trol that provides maximum carburetor heat when fully ON. Avoid prolonged ground operation with carburetor heat ON as the air is unfiltered. Air passes through a highly efficient dry type filter when the carburetor heat is OFF. 790330 6 SECTION II STRUCTURES CHEROKEE 140 "B" All structures are of aluminum alloy construction and are designed to ultimate load factors well in excess of normal re- quirements. All exterior surfaces are primed with etching primer and painted with acrylic lacquer. The wings are attached to each side of the fuselage by in- serting the butt ends of the respective main spars into a spar box carry through which is an integral part of the fuselage structure, providing, in effect, a continuous main spar with splices at each side of the fuselage. There are also fore and aft attachments at the rear spar and at an auxiliary front spar. animo f The wing airfoil section is a laminar flow type, NACA652-415 with the maximum thickness about 40% aft of the leading edge. This permits the main spar carry through structure to be located under the rear seat providing unobstructed cabin floor space ahead of the rear seat. LANDING GEAR udiso Baix 段 231 Durvolle sle osmog vysad 9)પણ siq-bexil The three landing gears use a Cleveland 6.00 x 6 wheel, the main wheels being provided with brake drums and Cleveland single disc hydraulic brake assemblies. The nose wheel and the main gear both use 6.00 x 6 four ply tires. All the tires have tubes. The nose gear is steerable through a .44° arc by use of the rudder pedals. A spring device is incorporated in the rudder pedal torque tube assembly to aid in rudder centering and to provide rudder trim. The nose gear steering mechanism also incorporates a hydraulic shimmy dampener. The oleo struts are of the air-oil type with normal extension being 3.25 inches for the nose gear and 4.50 inches for the main gear under normal static (empty weight of airplane plus full fuel 7. 08680915 CHEROKEE 140 "B" SECTION II and oil) load. The brakes are actuated by a hand lever and a master cyl- inder which is located below and near the center of the instrument panel. The toe brakes and the hand lever have their own brake cylinders but they both use a common reservoir. The parking brake is incorporated in the lever brake and is operated by pulling back on the lever and depressing the knob attached to the top of the handle. To release the parking brake, pull back on the brake lever to disengage the catch mechanism; then allow the handle to swing forward. 6920 CONTROL SYSTEM ja 3015- On the tonian Dual controls are provided as standard equipment with a cable system used between the controls and the surfaces. The horizontal tail is of the all movable slab type, with an anti-servo tab acting as a longitudinal trim tab. It is actuated by a control on the cabin ceiling. The stabilator provides extra stability and control with less size, drag, and weight than conventional tail surfaces. The differential action of the ailerons tends to elimi- nate adverse yaw in turning maneuvers and reduces the amount of coordination required in normal turns. The flaps are manually operated, balanced for light operating forces and spring loaded to turn to the up position. A past-center lock incorporated in the actuating linkage holds the flap when it is in the up position so that it may be used as a step on the right side. The flap will not support a step load except when in the full up position, so it must be completely retracted when used as a step. The flaps have three extended positions, 10, 25 and 40 degrees. 680915 8 30 SECTION II ال Fuel Strainer CHEROKEE 140 "B" FUEL SYSTEM bool (o ba of wold be Fuel is stored in two twenty-five gallon tanks which are secured to the leading edge structure of each wing by screws and nut plates to allow easy removal for service or inspection. The standard quantity of fuel is 36 gallons for the Cher- okee 140 "B". To obtain the standard quantity of fuel, fill the tanks to the bottom of the filler neck indicator. An auxiliary electric fuel pump is provided for use in case of failure of the engine driven pump. The electric pump should be on for all take-offs and landings and when switching tanks. The fuel strainer is equipped with a quick drain and is located on the located on the front lower left corner of the firewall. This strainer should be drained regularly to check for water or sediment ac- cumulation. To drain the lines from the tanks, the tank selector valve must be switched to each tank in turn, with the electric pump on, and the gascolator drain valve opened. Each tank has an individual quick drain located at the bottom, inboard, rear corner. 2011 Fuel quantity and pressure are indicated on gauges located in the engine gauge cluster on the left side of the instrument panel. beau new bata ELECTRICAL SYSTEM The electrical system includes a 12 volt 60 ampere alter- nator, battery, voltage regulator, overvoltage relay, and master 9 680915 CHEROKEE 140 "B" SECTION ( SECTION II switch relay. The battery and master switch relay are located beneath the baggage compart- ment floor. Access for service or inspection is obtained by raising the hinged floor panel. The regulator and overvoltage relay are located on the for- ward left side of the fuselage behind the instrument panel. Electrical switches are located on the right center in- strument panel, and the circuit breakers are located on the MAV KHO IOONM 35 MM OFF पु LOCK ON 7530 Circuit Breaker Panel HEAT DEF lower right instrument panel. A rheostat switch on the right side of the switch panel controls the navigation lights and the intensity. of the instrument panel light. Standard electrical accessories include starter, electric fuel pump, stall warning indicator, cigar lighter, and ammeter. Navi- gation lights, anti-collision light, landing light and instrument panel lighting are offered as optional accessories. Circuit provisions are made to handle a complete complement of communications and navigational equipment. The alternator system offers many advantages over the gen- erator system. The main advantage is full electrical power output at much lower engine RPM and results in improved radio and electrical equipment operation. Since the alternator output is available all the time, the battery will be charging almost con- tinuously. This will make cold weather starting easier. In generator systems, the ammeter indicates battery dis- charge. In the Cherokee electrical system the ammeter displays in amperes the load placed on the alternator. With all electrical equipment except the master switch in the OFF position, the ammeter will indicate the amount of charging current demanded by the battery. As each item of electrical equipment is turned on, the current will increase to a total appearing on the ammeter. This total includes the battery. The maximum continuous load for night 680915 10 CHEROKEE 140 "B" SECTION SECTION II switch relay. The battery and master switch relay are located beneath the baggage compart- ment floor. Access for service or inspection is obtained by raising the hinged floor panel. The regulator and overvoltage relay are located on the for- ward left side of the fuselage behind the instrument panel. Electrical switches are located on the right center in- strument panel, and the circuit breakers are located on the MAV AMPEREL Ꮎ KNOTS JOONM Off पु. 7530 LOCK ON Circuit Breaker Panel lower right instrument panel. A rheostat switch on the right side of the switch panel controls the navigation lights and the intensity of the instrument panel light. Standard electrical accessories include starter, electric fuel pump, stall warning indicator, cigar lighter, and ammeter. Navi- gation lights, anti-collision light, landing light and instrument. panel lighting are offered as optional accessories. Circuit provisions are made to handle a complete complement of communications and navigational equipment. The alternator system offers many advantages over the gen- erator system. The main advantage is full electrical power output at much lower engine RPM and results in improved radio and electrical equipment operation. Since the alternator output is available all the time, the battery will be charging almost con- tinuously. This will make cold weather starting easier. In generator systems, the ammeter indicates battery dis- charge. In the Cherokee electrical system the ammeter displays in amperes the load placed on the alternator. With all electrical equipment except the master switch in the OFF position, the ammeter will indicate the amount of charging current demanded by the battery. As each item of electrical equipment is turned on, the current will increase to a total appearing on the ammeter. This total includes the battery. The maximum continuous load for night 680915 10