DA20 systems and emergencies
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39 Terms
engine
continental motors, naturally aspirated, 4 cylinder, 4 stroke, fuel injected, horizontally opposed, air cooled
max engine power
125 hp at 2800 RPM
fuel
AVGAS 100, 100LL
oil capacity
4-6 qt
max ramp weight
1770 lbbs
max t/o and ldg weight
1764
max baggage weight
44 lbs
Va
106, no full or abrupt control deflections above this speed
Vfe t/o
100
Vfe ldg
78, top of white arc
Vno
118, do not exceed except in smooth air, use caution
Vne
164
White arc
operating range with flaps fully extended, 38-78
green arc
42-118, normal operating range
yellow arc
118-164, must be in smooth air
red line
164
oil pressure
10-100 psi, normal is 30 psi
oil temperature
75-240 F
cylinder head temperature
240-460 F
standard mixture rise
50-75 RPM, less means too lean
minimum ground idle speed
975 RPM, 1400 recommended
tachometer green arc
700-2800 RPM
oil temp indicator
75-240 F, green arc is 170-220 F
cylinder head temp indicator
260-420 F, max 260 F
fuel pressure indicator
3.5-16.5 psi
voltmeter
green arc is 12.5-16 volts, should be 14
max positive load factor flaps cruise
4.4
max positive load factor flaps t/o or ldg
2.0
max negative load factor flaps cruise
-2.2
max negative load factor flaps t/o or ldg
0
max demonstrated croswind component
20 knots
Vg
73 knots, gives best glide angle in case of emergency
emergency landing flaps cruise speed
64, add 5 knots per notch of flaps broken
engine failure t/o roll
throttle idle, brakes, flaps cruise, mixture idle, ignition switch off, genbat off
engine troubleshoot
73 knots, find best ldg field, fuel shut off valve open, mixture full rich, throttle 3/4 in, alternate air on, fuel pump on, fuel prime on, cycle ignition, check engine gauges
engine secure
mixture idle, fuel shut off valve closed, ignition switch off, fuel pump off, fuel prime off, throttle idle, declare emergency, gen/bat off when land
if oil pressure drops below green arc at 2100 RPM
land
oil pressure drops below green arc adn oil temperature is rising
reduce throttle to minimum required and land asap. expect engine failure and emergency landing
loss of fuel pressure
fuel pump on, land, may lose engine