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Originally Posted by zippyt
The only actual requirement for certification is that they read "empty" when empty.
NO WAY !!!! There HAS to be SOME kind of standerd for accuarcy !!
Not just "some, uhh maybe " then EMPTY !!!
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Originally Posted by Federal AIr Regulations Part 23 Subpart F: Equipment
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Sec. 23.1337 Powerplant instruments installation.
(b) Fuel quantity indication. There must be a means to indicate to
the flightcrew members the quantity of usable fuel in each tank during
flight. An indicator calibrated in appropriate units and clearly marked
to indicate those units must be used. In addition:
(1) Each fuel quantity indicator must be calibrated to read ``zero''
during level flight when the quantity of fuel remaining in the tank is
equal to the unusable fuel supply determined under Sec. 23.959(a);
(2) Each exposed sight gauge used as a fuel quantity indicator must
be protected against damage;
(3) Each sight gauge that forms a trap in which water can collect
and freeze must have means to allow drainage on the ground;
(4) There must be a means to indicate the amount of usable fuel in
each tank when the airplane is on the ground (such as by a stick gauge);
(5) Tanks with interconnected outlets and airspaces may be
considered as one tank and need not have separate indicators; and
(6) No fuel quantity indicator is required for an auxiliary tank
that is used only to transfer fuel to other tanks if the relative size
of the tank,
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Sec. 23.1553 Fuel quantity indicator.
A red radial line must be marked on each indicator at the calibrated
zero reading, as specified in Sec. 23.1337(b)(1).
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You see any accuracy standard there?
These are typical:
__________________
"Neither can his Mind be thought to be in Tune,whose words do jarre; nor his reason In frame, whose sentence is preposterous..."
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