Jump to content
The simFlight Network Forums

AoA to high at final approach.


Recommended Posts

8 hours ago, whiggy said:



Using this tool: https://library.avsim.net/esearch.php?DLID=178498&CatID=genutils

But also tried with tables. Same values.

Use this version: https://forums.x-plane.org/index.php?/files/file/39522-e-jets-speed-calculator/ works with the e-jets v3 as well. Basically an update of the one you're using now

Also a 10* angle of attack on final is normal and has been confirmed by real pilots of the e-jets

Link to comment
Share on other sites

  • 3 weeks later...

The original poster is correct, but he is speaking of deck angle/approach pitch. I see this also in the 175 when flying the proper approach speed. The 175 has a similar deck angle to the DC-10-30 when flown with flaps 5. It is approximately 4.5 on a 3 degree glide slope. The feel there flight model has it at 10 degrees, which is really high for a 3 degree glide slope. 5 degrees is on the high end of the normal approach pitch that you would find. 10 degrees is what you would find on delta wing type aircraft. These type mainly use the wing for lift, which you find to be typical on a concorde with it's 13 degree deck angle. The pitch of an aircraft during the different phases of flight is an accurate indicator of proper lift of the wing and it's lifting devices. 

If you need to verify an aircraft's approach pitch, go to it's flight crew training manual and it will display the aircraft's landing geometry. This picture will display view point, glide slope antennae location, no flare touch down point, threshold crossing height, etc for landing flaps at VREF. It will display the body angle (pitch) at different glide slope angles. You may also find touch down pitches at VREF to VREF minus 10. Keep in mind that these pitch angles are at VREF. An aircraft's pitch will change 1 degree per 5 knots. You can also find pitch values in the unreliable airspeed section of the QRH or flight manual. These charts will give you pitch and power values to use when your pitot system or airspeed indications are not reliable. Keep in mind that the approach section of unreliable airspeed charts are created at VREF plus 10 for safety margin.

Below is a link to a good video of the 175 on approach. You will notice that the nose reference on the PFD is just below and touching the 5 degree line on the ADI section. When I flew DC10s, we had the same attitude with flaps 35(4.5 pitch). Note that the airspeed is 137 which means his VREF is 132. 132 equates to a weight around 73,000 pounds or so. Also note the pitch behavior at the two different flap settings(3/5) and speeds. When I fly the approach in P3D, I am getting about 9.5 on the PFD ADI section. I hope this helps.  


Edited by g5flyer
Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
  • Create New...

Important Information

By using this site, you agree to our Terms of Use. Guidelines Privacy Policy We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.