Tham khảo tài liệu 'b17 pilot flight instructions part 3', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | alcohol system does not relieve condition it can be assumed the trouble is not caused by icing. 3. To clear out engines quickly after a glide at low power through icing conditions. 4. To obtain full power under icing conditions. 5. As an alternate method of ice elimination if use of fuel turbo or carburetor air filter is prohibited. e. DEFROSTER CONTROL. - Hot air for defrosting the pilot s and copilot s windshields is controlled by a red button in the vee of the windshield. G TRIM TAB CONTROLS. 1 Complete aileron tab travel requires about 3-3 4 turns of the knob located on the pilot s floor panel. 2 Complete rudder tab travel requires about seven turns of the wheel located on the floor in front of the control pedestal. 3 The elevator trim tab wheel on the left side of the control pedestal requires about six turns for complete travel. It has a friction brake to prevent creeping. g. LOCKS. 1 AILERON LOCK. - The aileron is locked in neutral position by a pin which is manually inserted in a hole in the left control column holding the center spoke of that wheel in a padded slot. The pin is clipped to the pilot s control column when not in use. 2 RUDDER AND ELEVATOR LOCK. - The rudder and elevator locking lever operates by cable control to place a pin in a socket on a segment at each of the control quadrants. The locking lever which is recessed into the floor aft of the engine control pedestal is locked in either the UP or DOWN position. The lever may be moved to the UP or LOCKED position regardless of the attitude of the control surfaces. Under this condition the control surfaces will automatically lock when the rudder is in the NEUTRAL position and the elevator is in the DOWN position. 3 TAIL WHEEL LOCK. - The tail wheel locking lever operates a single cable to retrace a springloaded locking pin from a socket in the treadle. The locking lever which is recessed into the floor aft of the control pedestal latches in the UP position only and may be moved into the DOWN .
