PART III - HANDLING
tank selector switch from AUTO to REAR until the
contents reduce to below 1,300 lb. then set the switch
to WING. A check that the associated level light
comes on at approx. 650 lb. will verify that all fuel
has been correctly transferred
(ii) If changeover to the wing tanks does not function
automatically, shown by the magnetic indicator still
pointing to REAR at a fuel state less than approx
1,300 lb., set the tank selector switch from AUTO
to WING. If the magnetic indicator still points to
REAR a fault in the changeover system has
occurred. The amount shown on the contents gauge
will include unusable fuel in the wing tank i.e.,
539lb., but only the front tank fuel (770 lb.) should
be relied upon as being available to the engine. This
condition can be verified by noting at what fuel
state the amber low-level lights come on.
(iii) Provided slow forward throttle movements and
small changes in attitude are made, the engine will
continue to run satisfactorily down to zero gauge
readings, but at low level states steep climbs and/or
sudden application of power should be avoided,
particularly when overshooting, as this will cause
fuel in the tanks to move away from the booster-
pumps, resulting in a possible fuel starvation and
flame extinction. Therefore at low fuel states
minimum power consistent with safety should be
used, steep attitudes avoided and a glide approach
planned. If a flame-out occurs, a relight may be
obtained by adopting a nose-down attitude and
pressing the relight button. The amount of unusable
fuel increases with sudden forward acceleration
and/or nose-up attitude: rig tests reveal the
following:-
Angle between fuel Unusable fuel lb.
surface and fuselage per side
datum
10° 123
20° 200
30° 230
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