section 7- reference speed deviation and stall warning system Flashcards
what is the RSD and stall warning system provided to give an indication of?
an indication of airplane lift at lower airspeed, regardless of weight, load factor, altitude, air density and turbulence
what does the system consist of? (5)
- RSD indicator
- STALL warning light and horn with push to test function
- lift computer
- flaps position transmitter
- heated lift transducer
what controls the heated lift transducer?
LH pitot heat switch
what powers the RSD and stall warning system?
28V DC
what protects the RSD and stall warning system?
- STALL WARNING/ESS BUS on the overhead breaker panel
- RSD HTR/bus 1 on the overhead breaker panel
what is calculated by the lift computer?
1.3 x Vs and stall warning taking into account actual flap position
when may SE Vref be more than 1.3Vs?
at landing weight below 4500kg
when will the RSD and stall warning indicator show OFF in the indicator window?
while on the ground and when the system is inoperative
where will the RSD indicator needle be during flight?
anywhere between FAST and SLOW
where is 1.3Vs on the RSD indicator?
the triangle in the middle
when will the STALL warning light and horn be activated?
when the needle moves into the slow range below 1.3Vs
when will the stall warning come on during normal flight?
5-12 knots prior to the stall
where should the RSD needle be during normal flight?
FAST range
how can we tell the RSD/stall warning system is operating correctly when we press the test light?
the pointer should move to SLOW, the light should illuminate and a warning tone must be heard
