I'm not sure what I'm doing wrong during take offs now, but I get a long beep until I reach VCLMB speed according to the speed card. I'm not in a stall situation as the speedo keeps moving in the right direction, I've checked my trim and everything else I can think of but don't know what I'm missing.

 

Does anyone know what the long beep during take off with nothing on the annunciator means?

You will hear the beep If the APU is still running during take off, but I think there is an annunciator light associated (not sure).

I've confirmed the APU is off during take off, but the continuous beep still persists. Its odd, because it only happens about 90% of the time at the moment. There are some departures where the beep never happens, but when it does, it's pretty annoying.

I put together a small video on the issue (forgive the wobble during the take off run as the crosswind was kicking my butt!)

 

https://youtu.be/QWe5kkkGpps

 

You can see the beep starts after lift off and doesn't stop until well after the gear is up.

You have to activate the Yaw Damper?

 

Also the right ND should be on 'NAV' mode, but probably not linked to the beep.

 

EDIT: I know, you need to activate the AUTOFEATHER

it looks like you are only using about 50% power to take off? i think it will warn if you have such low power settings unless you are configured for landin..ie flaps, and gear down..maybe just gear...you'll notice that when you retract it is when the beep starts, not when you rotate.

 

that also explains why you are struggling to maintain Vr and just barely above stall speed, when you should be accelerating quite a lot more during that phase. push the power levers to the full detent (90%) and see how it goes. really there is no reason to reduce them from full power until you reach cruise.

 

cheers

-andy crosby

I'll take a look at both the auto feather and the power settings and try again. As an aside, if I push throttles to 90%, won't that over rev the RPM on the props? You can see them exceed 1000 and go into the yellow during the rake off roll, so I back off power to keep them in the green.

I'll take a look at both the auto feather and the power settings and try again. As an aside, if I push throttles to 90%, won't that over rev the RPM on the props? You can see them exceed 1000 and go into the yellow during the rake off roll, so I back off power to keep them in the green.

 

the FADEC in the dash8 is really sophisticated and handles that stuff for you...the throttle lever controls the torque (via blade pitch iirc) and not the rpm....the RPM stays constant throughout the power regime. yes it gets into the yellow for a second when they first spin up, but it will stay at 1000 indefinitely, you can't overspeed them since it's controlled by the FADEC.

 

once you are in the air and stabilized for your climb, usually you'd reduce the RPM by moving the condition levers to 900rpm, for climb power.. leaving your throttle levers at full, and keep your airspeed at 170 or so for best climb, using aircraft pitch to adjust your speed rather than power... finally at cruise you use the condition levers to bring the props to 850rpm, and once you get to your intended cruise speed you'll pull back on the power to maintain that.

 

that's kind of an oversimplification but hopefully that gives you the right idea, maybe poke around online, there are some good tutorials around on the net, and also if you fly the q400 a lot, consider checking out the airline2sim video set on the q400, it is very informative and well done, and explains all this stuff in much more detail

 

cheers

-andy crosby

Throttles set to 90% did the trick. Thanks for helping a brother out!

Throttles set to 90% did the trick. Thanks for helping a brother out!

 

Throttles should be set to the stop to enable the selected power setting for take off. There's a detent precisely for that purpose on the Power Levers -  RATING