Hydraulics and Fuel Flashcards
What must each Hawker Flyer know
BTFANGS
What is BTFANGS and what are all of them
all of the things that uses hydraulics
B-brakes
T-thrust reversers
F-flaps
A -airbrakes
N -nosewheel steering
G-gear
S-stick pusher
how many hydraulic pumps and what are they
4 hydraulic pumps
2 engine driven
1 hand pump
1 auxiliary system pump
where are the hydraulic engine pumps and what do they do
they are on the accessory case
anytime the engine is running so are these pumps
variable volume
one can operate all sub-system
what does the hydraulic hand pump do and where is it
ground pressurization
rear equipment bay
what does the hydraulic auxiliary system pump do and where is it
extend the landing gear and operate flaps
in the cockpit
When will the LO PRESS annunciator extinguish
1,750 psi
what should the main accumulator pressure be at
1000 psi
what should the wheel brake accumulator be at
1000 psi
What is the total normal pressure for hydraulic
3000 psi
when will the LOS PRESS annunciator illuminate
1,500psi after a 57-second delay
if both hydraulic pumps fail what kicks in, and when
the pressure-maintaining valve will close at 2,300 psi (for brake operation)
When will the overpressure valve open
is there an indication
4,000 psi
there will be no indication
Auxiliary hydraulic system
6 pint tank
provides to lower the landing gear and operate flaps
in the flight deck
Accumulator
a compressable chamber that compresses a noncompressible fluid (hydraulic pressure)
gas accumulators most common
what are the kinds of fuel pumps
electric boost pump
jet pumps
engine
Electric boost pump info
one in each wing tank - total 2
can turn them on and off
transfers fuel to the center of the wings
Jet pump info
vacuum pump - no moving parts - works on its own
4 total
weight of jet a fuel
6.7 gallons
how many wing tanks do we have
2 - one electric boost pump in each
Auxiliary ventral tank
fuel in this tank can be transferred into both wing tanks through electric boost pump
What are the fuel tanks divided by
ribs and spars
do we have e vent system
yes
what is our fuel capacity
total -
in wings -
ventral tank -
10,000 pounds
8,500 in wings
1,500 in ventral tanks
jet pumps draw fuel into the
1 wing compartment
where do our jet pumps draw fuel from
one draws fuel from outer wing compartments
where does the electric fuel boost pump pull from
what does it use to do this
pulls fuel under pressure from the same-side engine via the LP fuel cocks
if the electric boost fuel pumps fail how do we get fuel?
gravity
it is still a gravity fed system
for ventral fuel how do we put it in the wings
AUX FUEL TRANSFER on
both boost pump working - both tanks evenly
One boost pump working - fuel transfers to operating fuel pump tank
How long does it take for ventral fuel to transfer
10 minutes with both boost pumps operating
18 minutes with one boost pump operating
if both boost pumps are not operating how do we get our ventral fuel
we don’t
Where does the APU get its fuel
left tank
Where can you read fuel info
right MFD
What can the ventral tank read
EMPTY, FULL, or HASHES
when can you transfer fuel from ventral tank to the wing tanks
3,300 - allows for all the fuel to leave the ventral tank
