Fix for AoA indicator on the PFD

[Bert Pieke 7,591]

3 hours ago, mgr said:

Hi,

Sorry to bother again about this topic. Done some flight recently and got the feeling the AOA indicaton is still a bit to high in relation to the airspeed.

Get around 10% too high airspeed on approach. Am wondering can this be tweaked with the code or do i have to modify the air-file so you get a different pitch when extending the gear and flaps (which will result in different angle of attack versus speed).

 

Regards,

Marcel

 

Marcel,  Don't know.. either might work - have a look!

[Raller 86]

What Speed-Values on each Flap-Position do you expect in the middle of the AOA Indicator?

0° / ? kts
15°/ ? kts
30°/ ? kts
40°/ ? kts

[mgr 29]

12 hours ago, Raller said:

What Speed-Values on each Flap-Position do you expect in the middle of the AOA Indicator?

0° / ? kts
15°/ ? kts
30°/ ? kts
40°/ ? kts

The values quoted earlier. At MLW (4500 kg) 118, 98, 89, 84 kts

Basicly the values of his table, multiplied  1.3

Just thought could it be the "new" flaps values could they mess things up a bit?

Quote

[Flaps.0]
type=1
lift_scalar = 0.7   // new
drag_scalar = 1.9  // new
pitch_scalar = 0.8 // new
span-outboard=    0.7   // Percent span for flap position
extending-time=    25   // Seconds, time to fully extend
system_type=        0   // 0 = electrical
damaging-speed  = 170                                  // KIAS
blowout-speed   = 175                                  // KIAS
flaps-position.0=   0   // degrees
flaps-position.1=  15   // degrees
flaps-position.2=  30   // degrees
flaps-position.3=  40   // degrees

Regards,

Marcel

 

 

[Raller 86]

On 23.11.2017 at 10:17 PM, Raller said:

<Script>(A:SIM ON GROUND,bool)  if{ 0 } els{ (A:Angle of attack indicator, number) 2.25 - (A:TRAILING EDGE FLAPS LEFT ANGLE,radians) - /-/ }</Script>

Now i get these values:
0°  /118kts
15°/96
30°/88
40°/81

Tata... free to try

 

Try the codeline above.

With the Value "2.25" you can slightly change the results. (i.e. 2.20 or 2.30)

[Raller 86]

1 hour ago, mgr said:

Just thought could it be the "new" flaps values could they mess things up a bit?

Could be...

[Raller 86]

...your guess was correct.

These entries
[Flaps.0]
lift_scalar = 0.7   // new
drag_scalar = 1.9  // new
pitch_scalar = 0.8 // new

cause the AOA indicaton to be a bit to high in relation to the airspeed. I don't use these entries...

[mgr 29]

Hi Raller,

2 hours ago, Raller said:

...your guess was correct.

cause the AOA indicaton to be a bit to high in relation to the airspeed. I don't use these entries...

Thanks for confirming this. Will start to fiddle with the values, hope to get it also right with the new flap entries.

Marcel