is located below the instrument board and may be engaged by being pulled
back when the pedals are depressed. It is automatically disengaged when
the pedals are depressed.
6. Trim Tabs - The adjustable trim tabs for the rudder and elevators [sic]
controls are located at the port side of the cockpit near the pilot's
seat, and work in the same plane as the controls concerned. The elevator
wheel has a crank handle for rapid adjustment. Dials at the hand wheels
indicate the positions of the tabs. [ES: the ailerons [also had] a cockpit
trim control which was located in front and just below the rudder trim
vertical to the rudder trim.]
7. Retractable Landing Gear - The retractable landing gear is operated
hydraulically by either the emergency hand pump or the electric pump. An
operating instructions plate is locate don the left hand side of the
cockpit. On aircraft Nos. A.H. 741 to A.H. 999 and A.K. 100 to A.K. 155
inclusive, a selector lever extends forward along the port side of the
cockpit and has a push button on the end which must be depressed to move
the handle from neutral. (The handle may be returned to neutral without
depressing the button.)
To retract the landing gear depress the button on the end of the handle,
and raise the handle to the "Up" position. Then operation the electrical
pump by pressing the switch button on the top of the control column. As a
precaution the gun selector switch should be "Off" in case the trigger
switch is squeezed by mistake. The switch must be held "On" during the
period required for the retraction of the landing gear. To lower landing
gear move handle to down position and operate switch button as before.
[DF: Note what Erik says above, that on the AVG Tomahawks the button on
top of the stick was replaced by a toggle below the pistol grip.]
NOTE: - On aircraft A.K. 156 and onwards the push button on the
undercarriage selector lever is replaced by a safety latch bolt which must
be pulled forward before the lever can be moved.
To ensure positive engagements [sic] of the locks, the switch should be
held on for a few seconds after the indicator and the warning horn show
that they are down. As a final check the pilot should try and move the
hand pump lever on the right hand side of the cockpit. If this lever
cannot be moved, except by a high load which brings the hydraulic bypass
valve into operation, the pilot can be sure that the landing gear is
locked down. The selector lever should then be raised to its neutral
position. This hydraulic valve control lever should be in neutral when
taking off or landing.
An indicator on the instrument board indicates the position of the landing
gear whenever the battery switch is turned "On." A warning klaxon which
operates when the throttle is closed with the wheels retracted, is only
connected to the locks and consequently will sound when the wheels are
down if the locks are not engaged.
This klaxon circuit is controlled through a toggle switch which is mounted
just ahead of the throttle quadrant and is actuated by a cam mounted on
the throttle rod. This came may be pulled out to turn the klaxon off
temporarily during a throttled dive with the wheels retracted. It engages
automatically when the throttle is opened to the stop.
Emergency operation: In the event of the electrical system failing, select
the required position for the undercarriage on the selector lever and
operate hand pump on right hand side of the cockpit.
Warning - Never operate pump with selector lever in "Up" position when
airplane is resting on its wheels.
[ES: In the event of electric failure the gear was dropped by operating
the emergency hydraulic hand pump. In the event of a hydraulic failure,
the handle was removed from its normal position, and placed on a second
position outboard of the normal position. In this position, would direct
pressure to the main gear and lower the mains, but it would not lower the
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