Mig-29 Bug?

[danielm]

I love the model of the Mig-29 by Wpnssgt and Column5 however try as I may, I could not break the sound barrier. After studying the MIG-29_DATA.ini file I found what may be a decimal point error for the fuselage drag.

 

The line

 

CD0MachTableData=1.275,1.000,0.991,46.549,48.253

 

Maybe should read:

 

CD0MachTableData=1.275,1.000,0.991,4.6549,4.253

 

After this slight change I was able to go supersonic.

 

If this has been discussed before please forgive.

 

Best wishes

 

Dan

[Dave]

Good find Dan, Thank you!

[Fubar512]

Actually, that wasn't that FM's only issue. The "MaxSpeedSL" value was too low, and that effects Vmax at all altitudes. As a rule, the CDO tables are predicated on the rule that aerodynamic drag increases exponentially as a function of increased indicated air speed.

[Anhnguyen]

WoE show the incorrect speed of almost all the fast aircrafts. The MiG-25 suppose to be Mach 3 but in the game, it can only fly 1400 km/h, like the MiG-21. The sam with the Su-27, too. Several day ago, I broke the 2000km/h in a Su-27 diving from 30000 m.

2000 km/h

[Fubar512]

WoE show the incorrect speed of almost all the fast aircrafts. The MiG-25 suppose to be Mach 3 but in the game, it can only fly 1400 km/h, like the MiG-21. The sam with the Su-27, too. Several day ago, I broke the 2000km/h in a Su-27 diving from 30000 m.

2000 km/h

 

The speeds on all the aircraft you've mentioned are correct, in game. You are confusing indicated air speed with true air speed.

[SayethWhaaaa]

So what about the switchblade? Am I doing M2.1 true or is that just indicated?

[Fubar512]

So what about the switchblade? Am I doing M2.1 true or is that just indicated?

 

I do not have the switchblade model, so I can only guess that the behavior in question is due to either (or both) of the following:

 

A) Exceeding inlet, EGT, or oil temp settings

b) Operating for an extended time in excess of 105% RPM

 

To illustrate those effects here, I have my own flight model for the MiG-25PD. In real life, the maximum permissible speed with a war load (according to published sources), is Mach 2.83. The aircraft easily attains that velocity at 45,000 feet and 102% RPM:

 

http://forum.combatace.com/uploads/1172413...9_43_107485.jpg

 

At 107% RPM, it is possible to hit Mach 3.2 in clean configuration (or, in this case, Mach 3.07 with a war load), above 50,000 feet. However, as in real life, those engines will only attain that air speed once

 

http://forum.combatace.com/uploads/1172413...9_43_127061.jpg