4.36 FLCS improvements
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Just installed 4.36, so compared to previous versions, the aircraft with DFLCS feels a lot more resistant to departures, especially the one caused by inertial coupling moments. Pulling while rolling at the same time at low speed & high altitudes seems to has less chance of overshooting the AOA limit.
The FLCS gains bug reported earlier is also seems to be fixed: https://forum.falcon-bms.com/topic/18289/flcs-gain-when-airspeed-over-400kts-alt-flaps-in-extend-air-refuel-in-open/
Another thing I noticed is that the yaw axis feedback seems to be over-gained when flying at transonic speeds and above, causing the rudder to flutter and overcorrect for yaw rate and lateral acceleration. A pulse input of rudder at higher speeds should reveal this.
So I checked the block diagram, that the yaw axis gain (applied to combined feedback) is increased with qc/Ps, presumably to compensate for the decreased directional stability due to mach effects. If the NASA 0.6 mach wind tunnel data is used for all range of speeds, could it be that the directional stability Cn-beta would be overestimated at higher mach numbers, that caused this overgain behavior?
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@LJQCN101 said in 4.36 FLCS improvements:
Just installed 4.36, so compared to previous versions, the aircraft with DFLCS feels a lot more resistant to departures, especially the one caused by inertial coupling moments. Pulling while rolling at the same time at low speed & high altitudes seems to has less chance of overshooting the AOA limit.
The FLCS gains bug reported earlier is also seems to be fixed: https://forum.falcon-bms.com/topic/18289/flcs-gain-when-airspeed-over-400kts-alt-flaps-in-extend-air-refuel-in-open/
Another thing I noticed is that the yaw axis feedback seems to be over-gained when flying at transonic speeds and above, causing the rudder to flutter and overcorrect for yaw rate and lateral acceleration. A pulse input of rudder at higher speeds should reveal this.
So I checked the block diagram, that the yaw axis gain (applied to combined feedback) is increased with qc/Ps, presumably to compensate for the decreased directional stability due to mach effects. If the NASA 0.6 mach wind tunnel data is used for all range of speeds, could it be that the directional stability Cn-beta would be overestimated at higher mach numbers, that caused this overgain behavior?
Absolutely no change a all i this area
Only things that changed are digital FLCS limited to 9.0G instead of 9.3g
No idea why noeone noticed this bug in 15 years lol
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@Mav-jp said in 4.36 FLCS improvements:
Absolutely no change a all i this area
Only things that changed are digital FLCS limited to 9.0G instead of 9.3g
No idea why noeone noticed this bug in 15 years lol
Because it was a feature to pull more than 9G.
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@Mav-jp said in 4.36 FLCS improvements:
Absolutely no change a all i this area
Only things that changed are digital FLCS limited to 9.0G instead of 9.3g
No idea why noeone noticed this bug in 15 years lol
Noticed that too. I guess some have believed this was a feature, even me before because a full-scale development block diagram of block 25 testbed aircraft tricked me into thinking that:
But I heard that the DFLCS in development stages uses identical control logic from the Analog FLCS in order to spot any handling quality differences. So this 8.3 in the diagram might well comes from Analog FLCS.
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I just gave the Block 50 a go, and I can hardly reach 9 g now, more like 8.6-8.8 at 450kts sea level. G-onset rate seems slower than before too.
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@thunder said in 4.36 FLCS improvements:
I just gave the Block 50 a go, and I can hardly reach 9 g now, more like 8.6-8.8 at 450kts sea level. G-onset rate seems slower than before too.
No issue to get a sustain 9.0G
Check your EM charts
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@Mav-jp what about onset rate? Maybe I’m wrong but it feels different than it did in previous versions.
I am talking about 22k lbs, sea level and 450kts I should hit 9 g very quickly, instead it takes several seconds before it eventually ends up at 9. -
@thunder said in 4.36 FLCS improvements:
@Mav-jp what about onset rate? Maybe I’m wrong but it feels different than it did in previous versions.
I am talking about 22k lbs, sea level and 450kts I should hit 9 g very quickly, instead it takes several seconds before it eventually ends up at 9.Strictly identical