The latter, when made of rubber, wear
quickest underneath. Inspect axles and skids to see if
there are any signs of them becoming bent. The wheels
should be taken off occasionally and greased.
LOCKING ARRANGEMENTS.--Constantly inspect the locking
arrangements of turnbuckles, bolts, etc. Pay particular
attention to the control cable connections, and to all moving
parts in respect of the controls.
LUBRICATION.--Keep all moving parts, such as pulleys,
control levers, and hinges of controlling surfaces, well greased.
SPECIAL INSPECTION.--Apart from constantly examining
the aeroplane with reference to the above points I have made,
I think that, in the case of an aeroplane in constant use
it is an excellent thing to make a special inspection of every
part, say once a week. This will take from two to three
hours, according to the type of aeroplane. In order to carry
it out methodically, the rigger should have a list of every part
down to the smallest split-pin. He can then check the parts
as he examines them, and nothing will be passed over. This,
I know from experience, greatly increases the confidence of
the pilot, and tends to produce good work in the air.
WINDY WEATHER.--The aeroplane, when on the ground,
should face the wind; and it is advisable to lash the control
lever fast, so that the controlling surfaces may not be blown
about and possibly damaged.
``VETTING'' BY EYE.--This should be practiced at every
opportunity, and, if persevered in, it is possible to become
quite expert in diagnosing by eye faults in flight efficiency,
stability and control.
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