[report] Lift curve slope significantly lower than published data

[oldtimesake]

When checking this video, I found something interesting:

 

At 3 min 01:

 

 

At almost sea level, mach 0.83, even at 15deg AOA, the F-16 could not reach 9G.

 

From published data, at CAT I (15 deg limit at 9G), a loaded F-16C-50 (26000 lbs flying weight) could reach 9G at Mach 0.67, with 15 deg AOA.

 

Given the dynamic pressure increases at a power of 2, at M0.83 and 15 deg AOA, F-16 should exceed 9G easily (13.8G theoretically). In DCS it's almost halved.

 

Conclusion: in DCS the F-16 requires much higher AOA to pull a given maneuver than in real life.

 

To DEV team: This paper is very useful for you to generate flight model (TRIMMED lift curve and drag polar are included)

 

Correlation of F-16 Aerodynamics and Performance Predictions with Early Flight Test Results," AGARD CP-242, by TS Webb, DR Kent, JB Webb

 

https://i.postimg.cc/Fs1b1hfh/F16-test-242.jpg

 

https://i.postimg.cc/fTXPk7Sz/F16-test-242-2.jpg

 

(The curves above are trimmed)

 

(to moderator: this is an old article and does not violate rule 1.16)

Edited May 20, 2020 by oldtimesake

[Bouli306]

When checking this video, I found something interesting:

 

At 3 min 01:

 

 

At almost sea level, mach 0.83, even at 15deg AOA, the F-16 could not reach 9G.

 

From published data, at CAT I (15 deg limit at 9G), a loaded F-16C-50 (26000 lbs flying weight) could reach 9G at Mach 0.67, with 15 deg AOA.

 

Given the dynamic pressure increases at a power of 2, at M0.83 and 15 deg AOA, F-16 should be able to pull 13.8G, while in DCS it's almost halved.

 

Conclusion: in DCS the F-16 requires much higher AOA to pull a give maneuver than in real life.

 

To DEV team: This paper is very useful for you to generate flight model (lift curve and drag polar are included)

 

Correlation of F-16 Aerodynamics and Performance Predictions with Early Flight Test Results," AGARD CP-242, by TS Webb, DR Kent, JB Webb

 

https://i.postimg.cc/Fs1b1hfh/F16-test-242.jpg

 

(to moderator: this is an old article and does not violate rule 1.16)

 

Wait what?? 13,8G's.....not a chance

[oldtimesake]

Wait what?? 13,8G's.....not a chance

 

Technically it should be limited to 9G, and the AOA should be much lower than 15 deg.

13.8G is a theoretical value by assuming that if the jet can not be ripped off, how much G it could reach at 15 deg AOA.

This is to prove how absurd it is modeled （7G） in DCS.

Edited May 17, 2020 by oldtimesake