Download 4.2.26. Loadmeter The loadmeter, located on the bottom left of the

4.2.26. Loadmeter
The loadmeter, located on the bottom left of the instrument panel, is marked LOAD
and indicates the percentage of total system amperage being used.
The loadmeter is an ammeter that shows how much work the electrical system is doing and
indicates the load on the electrical system in percentage of maximum load.
4.2.27. Generator (off) warning light
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The red generator warning light, located on the bottom left on the instrument panel, is
illuminated by primary bus power when the generator fails, if generator voltage drops below
that required to close the reverse-current relay, or when the generator switch is OFF. Also, if
the generator voltage exceeds 31 V, the generator is automatically cut out of the circuit and
the generator warning light comes on. Illumination of the warning light indicates that all
equipment powered by the secondary bus is inoperative and that the battery is powering the
primary bus; therefore, all other non-essential electrical equipment should be turned off to
conserve battery power.
4.2.28. Voltmeter
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The voltmeter, located on the bottom left of the instrument panel, provides direct
indication of the generator voltage output, i.e. it indicates the actual voltage in the DC
circuit.
The gauge is graduated from 0 to 30 V and scaled to 1 V throughout.
4.2.29. Landing gear handle
The landing gear handle, located on the left side of the instrument panel, electrically
(primary bus power) controls (through primary bus power) the gear and gear door
hydraulic selector valve. Moving the handle to UP or DOWN causes utility hydraulic
system pressure to position the gear correspondingly. When the gear is down and
locked and the weight of the airplane is on the gear, a ground safety switch prevents
gear retraction if in the case where the control handle is inadvertently moved to UP.
The wheel fairing doors are not controlled by the safety switch; therefore, they will
,
,.
follow their normal sequence by opening when the handle is moved to UP
As a
result, thereby providing a warning is provided that the landing gear handle is in the
wrong position (UP) for ground operation.
The wheel portion of the handle illuminates to serve as the landing-gear-unlocked or doorunlocked warning light.
4.2.30. Radio compass indicator
1. VAR knob (rotates the scale)
2. Pointer (indicates direction to
transmitter)
3. Top index (fixed at 12 o’clock position)
The ID91A/ARN6 radio compass indicator, located on the instrument panel, is not a
compass per se but only an indicator that has a needle coupled to a synchro motor
that is coupled to another device or mechanism that actually performs the compass
function. In the F-86F, it is used in conjunction with the AN/ARN-6 radio compass set
– a navigational aid powered from the secondary bus – to determine the direction to a
radio transmitter as an aid for flying toward to (or away from) a station.
The radio compass indicator is driven by the radio compass and indicates the angular
position of the autosyn transmitter located in the loop maybe have a link to where
the autosyn is described further and gives the bearing of a radio transmitter when the
loop is at a true null.
The pointer indicates the relative bearing to the transmitter, i.e. the direction to the
desired station relative to the aircraft’s nose. The 12 o'clock position (marked by a
fixed index, the so-called “top index”) represents the nose of the aircraft and the 6
o'clock position the tail. The relative bearing, the angle measured clockwise from the
nose of the aircraft to the station, is indicated by the needle. If the needle points
straight up, the aircraft is flying towards the transmitter. When the needle swings
around 180 degrees, the transmitter has just been overflown.
When the true magnetic heading of the aircraft is set under the top index, the pointer
will indicate the magnetic bearing to the station instead of the relative bearing. The
indicator’s bearing scale can be manually rotated with the knob labeled “VAR.” located
on the front of the indicator.
The bearing scale is graduated every two degrees with every 30-degree graduation indicated
by the proper numeral.