Quick & dirty tweaks on Ivan's Mig-21F

[StormILM]

I recently decided to look into tweaking Ivan's excellent little Mig-21F. After I went 100% FSX a while back, I decided to leave that model behind in FS9. I had done a rework of the airfile in FS9 but still was never completely satisfied with it. After Ivan released his Mig-21MF, I was delighted to find that FDE was considerably better than the earlier F model. So I reinstalled the F model and began a patchwork of tweaking but the old airfile even with reworking was to me still a bit crude and decided to try the MF airfile but using the F model Weights, Fuel, and Thrust settings in the Cfg file. After a lot of trial and error, I think I got it to where it handles better/more stable and fixed the overpowered braking chute effect(which is connected to the toe brake entry),overpowered Spoiler effect, fuel consumption and other things as you'll see. The performance is close(but not dead on) to the real F model based on the USAF test data that I have on PDF. So, here it is:

*Also, if you do not already have it, download my Afterburner update for the mig at Flightsim.com file name: mig-21ab.zip)

Mig-21F Updates

You can download both the F and MF models at http://migsim.ic.cz/

Use Ivan Jurcaga's Mig-21MF Airfile by copying & pasting it to your Mig-21F folder.

In each [fltsim] entry, copy & paste this in the appropriate line: sim=mig//eFka //<-this accesses the MF Airfile

Replace the entire weight and balance section with this one:

[WEIGHT_AND_BALANCE]
reference_datum_position=0.000, 0.000, 0.000
empty_weight_CG_position=0.000, 0.000, 0.000
max_number_of_stations= 50
empty_weight= 20979.000
empty_weight_roll_MOI=30000.000000
empty_weight_pitch_MOI=150000.000000
empty_weight_yaw_MOI=190000.000000
empty_weight_coupled_MOI=0.000000
max_gross_weight=30000.000
CG_forward_limit=0.000
CG_aft_limit=1.000
station_load.0= 0.000, 0.000, 0.000, 0.000

In the [airplane_geometry] section, change the following entry(copy & paste)

spoiler_limit=40.000//60.000

You can also tame the voracious fuel consumption by copying & pasting these two entries. The comsumption rate is still high but with these adjustments, probably a bit more realistic:

[GeneralEngineData]
engine_type=1
Engine.0=0.000, 0.000, 0.000
fuel_flow_scalar=1.120 //<---Modified
min_throttle_limit=0.000000
max_contrail_temperature = -30

[TurbineEngineData]
fuel_flow_gain=0.002
inlet_area=3.000
rated_N2_rpm=18000.000
static_thrust=12655.000
afterburner_available=1
reverser_available=0
afterBurnThrustSpecificFuelConsumption = 1.000 //<---Modified
afterburner_throttle_threshold = 0.90 //<---added


[brakes]
toe_brakes_scale=0.300//0.500//1.100 //<----Modified to reduce braking parachute effect on landing(note, this will reduce toe brake effect)
parking_brake=1
differential_braking_scale = 1.0
hydraulic_system_scalar = 1
//auto_brakes=0//4


[flight_tuning]
cruise_lift_scalar=1.5 //<----Set to give better takeoff/landing speeds for the lighter F model
parasite_drag_scalar=1.0
induced_drag_scalar=1.0
elevator_effectiveness=1.4 //<-adjusted
aileron_effectiveness=4.5 //<-adjusted
rudder_effectiveness=1.0
pitch_stability=1.2 //<-adjusted
roll_stability=1.0
yaw_stability=2.0
elevator_trim_effectiveness=1.0
aileron_trim_effectiveness=1.0
rudder_trim_effectiveness=1.0

 

[fsafranek]

Excellent. Did enjoy that model. Will have to dust her off and check these mods out.
:ernae:

 

[ST0RM]

The model was a work of art. However, using it in game was a real pain. You had to read Russian in order to get the thing started. Even after having the manual right in front of me. I'd love to tryit again one day, but after some translation.

 

[delta_lima]

The model was a work of art. However, using it in game was a real pain. You had to read Russian in order to get the thing started. Even after having the manual right in front of me. I'd love to tryit again one day, but after some translation.

Did you make this entry?

//gauge32=MiG21F13!Automat motoru, 0 , 0 , 10 , 10

Commenting out that will enable you to CTRL+E ...

Anyone know which is the drop tank texture? My Syrian tank is grey, whereas the a/c undersides are light blue. I have a nice DDR paint from Bjoern with the right colour of tank - I'll switch that one, if I know which texture it is.


Cheers - and thanks for resurrecting this model - though the MF is native, there's a certain je ne sais quois about the F13 .... Love it - and Zsolt's paints are, well, what more need I say?

DL

 

[ST0RM]

Did you make this entry?

//gauge32=MiG21F13!Automat motoru, 0 , 0 , 10 , 10

Commenting out that will enable you to CTRL+E ...

Anyone know which is the drop tank texture? My Syrian tank is grey, whereas the a/c undersides are light blue. I have a nice DDR paint from Bjoern with the right colour of tank - I'll switch that one, if I know which texture it is.


Cheers - and thanks for resurrecting this model - though the MF is native, there's a certain je ne sais quois about the F13 .... Love it - and Zsolt's paints are, well, what more need I say?

DL

Nope, but I will now. Thanks!

-Jeff