Min maneuvering (CRJ) Speeds

[Oakum_Boy]

The minimum manuvering speed is Vref for that flap setting plus 10. If you want to fly at flaps 30 on an ILS you can fly right down to the Vref for that flap config. At ASA our speed cards have this info. If you want to manuver, fly that speed puls 10. Conversely on takeoff, the "min manuvering" for that flap setting is v2+10.

The green line shown on the speed tape does not show a speed. It is merely the place Collins chose to display the angle of attack indicator. When it is centered in the display, i.e., the speed you are currently at, It shows proper angle of attack for flaps 45 approach. Nothing else. When people try to tell you that it indicates you are getting close to stalling or something stupid, just don't listen.

 

[bailout]

>>The green line shown on the speed tape does not show a speed. It is merely the place Collins chose to display the angle of attack indicator. When it is centered in the display, i.e., the speed you are currently at, It shows proper angle of attack for flaps 45 approach. Nothing else. When people try to tell you that it indicates you are getting close to stalling or something stupid, just don't listen.<<

What? Is this why its displayed when you're at FL310 and climbing? The green line is 1.27xVs for a given configuration. I didnt realize the speed tape gives you angle of attack information. (aside from increasing and decreasing) On G/S with flaps 45 and Vref + 5, the green line is 20-30 knots below speed.

 

[sweptback]

What? Is this why its displayed when you're at FL310 and climbing? The green line is 1.27xVs for a given configuration. I didnt realize the speed tape gives you angle of attack information. (aside from increasing and decreasing) On G/S with flaps 45 and Vref + 5, the green line is 20-30 knots below speed.

The green line doesn't give you angle of attack information any more than the airspeed indicator does. I think he was trying to say that you could infer AOA from the green line, just like how you could infer what your AOA would be if you were flying Vref-15kts (ie, pretty close to the max).

The green line is a nice tool, and that's about it. I agree there is a lot of misinformation about that line, but everybody can agree that you want to stay above it, by as wide of a margin as you possibly can!

 

[DDpaysoff]

The minimum manuvering speed is Vref for that flap setting plus 10. If you want to fly at flaps 30 on an ILS you can fly right down to the Vref for that flap config. At ASA our speed cards have this info. If you want to manuver, fly that speed puls 10. Conversely on takeoff, the "min manuvering" for that flap setting is v2+10.

The green line shown on the speed tape does not show a speed. It is merely the place Collins chose to display the angle of attack indicator. When it is centered in the display, i.e., the speed you are currently at, It shows proper angle of attack for flaps 45 approach. Nothing else. When people try to tell you that it indicates you are getting close to stalling or something stupid, just don't listen.

That's totally different than what we do, but thats cool. I thought there was only one Vref, but whatever.
As far as the green tape I thought it was the Airspeed your drag inreases disproportionately to your lift. I mean, I don't want to get all scientific here but, I think it gives you a margin between what aoa and aoa available for incresed performance before you reach the point of diminishing returns. With all that being said, I am probably wrong, and I don't use the darn thing anyway. Leave it to the canadians.

 

[DirkkDiggler]

As per the Bombardier Pilot Reference Manual:

"Low-Speed Awareness Cue (Green Line) <FAA Only>

The green line is a low-speed awareness cue, which is 25% above shaker speed. It is continuously calculated, and is based on current aircraft configuration (i.e. flaps, gear) and flight conditions (i.e. bank angle, g-force). It is a reference only."

The green line is only found on aircraft certified under the FAA's jurisdiction.

 

[flying4food]

[/QUOTE]So tell me young dumb ass.. You're #18 on final into ATL. Approach tells you to maintain 160. You're at flaps 20 with a min speed of 162. Are you going to drop your flaps to 30 and hold 85% to keep you at 160, or are you going to slow with flaps at 20??

So you hold 165 kts, you are still within 10% of your assigned speed!!