CV990 AIRCRAFT.CFG FILE EDIT !

[aerofoto - HJG Admin]

Folks .... those of you whom enjoy flying the CV990 might like to try the following edit devised by George CARTY.

Open your CV990 AIRCRAFT.CFG file .... locate the follwing entry ....

[Reference Speeds]

.... within this entry pay attention to the last 2 lines of data only ....

max_indicated_speed=
max_mach=

.... change these lines to read precisely as follows ....

max_indicated_speed=393.0000
max_mach=0.970000

.... this completed entry will then all read/appear as follows

[Reference Speeds]
flaps_up_stall_speed=132.000000
full_flaps_stall_speed=105.600000
cruise_speed=900.558787
max_indicated_speed=393.0000
max_mach=0.970000

This edit will allow you to then fly the CV990 at around its max speed of MACH 0.95 to MACH 0.97 .... without "ringing the bell".

At FL320 the overspeed alarm won't now kick into action until just over 568KTS/TAS.

I've just made this edit and are particularly satisfied with the results .... but .... watch your fuel burn in the high mach range .... fuel consumption will be in the order of a horrendous 4500lbs per hour .... pretty close to the real fuel burn for these aircraft in that flight regime which is why a lot of airlines didn't like these aircraft.

Thanks for this George !

We are currently aware the CV990 FDE currently exhibits excessive/unrealistic cceleration rate from T/O to cruise altituide. This is something we are working to address .... hopefully a unpadate will become available in the future .... no time frame though !

Enjoy !

Mark C
BOG/CO

[Tony Madge - HJG]

Mark the present set up is
max_indicated_speed=690.476563
max_mach=0.970000

so is the 393 figure correct it looks a little low to me??

[George Carty - HJG]

Oops I made a mistake when looking up the Vmo numbers.

Vmo should be 417 knots for the 990 (the 393 is for the 880). I don't think even Concorde ever got as high as 690 KIAS though!

[aerofoto - HJG Admin]

Tony .... I'm pretty sure you must be using an earlier modified AIRCRAFT.CFG file (by someone else perhaps .... a few of these have floated around in the past) because definitely the default REFERENCE SPEED values within the AIRCRAFT.CFG file of the HJG supplied CV990 Aircraft Base Pack are as follows ....

[Reference Speeds]
flaps_up_stall_speed=132.000000
full_flaps_stall_speed=105.600000
cruise_speed=900.558787
max_indicated_speed=690.476563
max_mach=0.950000

Vmo should be 417 knots for the 990 (the 393 is for the 880)

George .... are you now saying those critical MAX INDICATED SPEED and MAX MACH values for the CV990 should appear as bold typed below ....

[Reference Speeds]
flaps_up_stall_speed=132.000000
full_flaps_stall_speed=105.600000
cruise_speed=900.558787
max_indicated_speed=417.0000
max_mach=0.970000

Is that correct ?

With regard to my quoted 568KTS/TAS at FL320. That's only what I'm seeing presented before me on the CV990 panel TAS gauge.

Mark C
BOG/CO

[George Carty - HJG]

Yes that is correct.

[aerofoto - HJG Admin]

Thank you George !

OK folks .... these then are the correct REFERENCE SPEED values for the CV990 AIRCRAFT.CFG file .... as per the data presented below ....

[Reference Speeds]
flaps_up_stall_speed=132.000000
full_flaps_stall_speed=105.600000
cruise_speed=900.558787
max_indicated_speed=417.0000
max_mach=0.970000

Adjust your data to the above prescribed data .... and have fun everyone !

Mark C
BOG/CO

[Tony Madge - HJG]

thanks for clearing this up guys