Flight model comparation - BMS F16 Falcon DCS F16 Viper
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You reach close to 900 KCAS at FL150 in BMS ? No way ?
Edit : It actually shows MACH 1.7 which sounds more like it. I did not know it meant such a high CAS airspeed.
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Hi Rev!
The airbrake rl video is badly chossen. On most to videos airbrake retraction is a bit longer (about 5-6s).
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Hi Rev!
The airbrake to video is badly chossen. On most to videos airbrake retraction is a bit longer (about 5-6s).
Maybe because the air pushing on the airbrakes in flight is helping it to restract faster ?
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what is a typical “yes, exactly that” case for me … is 4:18 - from personal fighting experience… the dynamic “egg” of BMS (load and radius change) and the “constant pull” (radius and rate “pressure” - if that makes sense) … i looked multiple times in slow motion at that turn… the telemetry is very very much similar… from initiation to finish… however… you can see the different cirlce shapes… what is surprising… familiar from combat in-game, but strange to see it like that… not sure what causes it… the athmosphere modelling or what… it is that feeling, that in DCS you constantly are “pulling” and pressuring the bandit… close… closer… yet in BMS it is much more about timing load-factor and the expanding and collapsing radius… at least in my simple words, or observation… pull at all times same way (hard)… leads you to nowhere in bms… it works in dcs to kill someone.
the telemetry values in that turn divert minimal throughout all measurements taken….however… graphically, the radiuses drawn are totally different in “shape”.
those things instantly jump into my eyes… because i can identify the combat differences (and confirm it) between bms and dcs just by looking at THAT …i can not explain it though. i have a guess, but not with certainty.
maybe Mav-Jp can review the same … -
Maybe because the air pushing on the airbrakes in flight is helping it to restract faster ?
“Normally” it shouldn’t be the case. But here, it is possible (afterburners in use!) and/or could be something a little bit modified => a/c from flight test centre.
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@F-16.net
Tail serial AF 92 455, Edwards AFB
F-16B Block 15AR OCU, upgraded; to F-16B Block 20 MLU on 2015
So I guess older sys;
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@A.S:
what is a typical “yes, exactly that” case for me … is 4:18 however… you can see the different cirlce shapes… what is surprising…
What is displayed by Tacview is a ground trajectory … what about the wind?
Revientor tells us nothing about ATM conditions : standard atmosphere (QNH: 1013 / T: 15°C) or not standard? … wind / no wind at FL150? same conditions on both sims or not … etc … -
… watching gain the video from 4:18 … if TAS and roll angle are constants, in the BMS view (if we consider it oriented to the north) we clearly have a wind from the south-est (bottom right corner of viewport).
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@A.S:
the dynamic “egg” of BMS
… watching gain the video from 4:18 … if TAS and roll angle are constants, in the BMS view (if we consider it oriented to the north) we clearly have a wind from the south-est (bottom right corner of viewport).
I don’t think there is any wind in both scenarios, as TAS and GS remain identical throughout, but there is a clear difference in speed from ~4:35 onwards (roughly from when they complete the initial half of the turn). DCS speed remains relatively steady throughout the entire turn, whereas BMS loses about 30 - 40 kts in that second half, which will automatically reduce your turn radius. The only thing I’m stumped by, that could indicate the presence of wind, is that despite losing speed, it looks like BMS fuel flow actually increases by about 1000PPH in that final half of the turn.
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as TAS and GS remain identical throughout,
GS/TAS info coming from what? … this is Tacview. How Tacview is determining the wind? …
The only thing I’m stumped by, that could indicate the presence of wind, is that despite losing speed, it looks like BMS fuel flow actually increases by about 1000PPH in that final half of the turn.
How wind can have something to do with FF? (unless we want to fly a constant GS)
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Rather than suggesting … better simply ask Revientor.
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@A.S:
what is a typical “yes, exactly that” case for me … is 4:18 - from personal fighting experience… the dynamic “egg” of BMS (load and radius change) and the “constant pull” (radius and rate “pressure” - if that makes sense) … i looked multiple times in slow motion at that turn… the telemetry is very very much similar… from initiation to finish… however… you can see the different cirlce shapes… what is surprising… familiar from combat in-game, but strange to see it like that… not sure what causes it… the athmosphere modelling or what… it is that feeling, that in DCS you constantly are “pulling” and pressuring the bandit… close… closer… yet in BMS it is much more about timing load-factor and the expanding and collapsing radius… at least in my simple words, or observation… pull at all times same way (hard)… leads you to nowhere in bms… it works in dcs to kill someone.
the telemetry values in that turn divert minimal throughout all measurements taken….however… graphically, the radiuses drawn are totally different in “shape”.
those things instantly jump into my eyes… because i can identify the combat differences (and confirm it) between bms and dcs just by looking at THAT …i can not explain it though. i have a guess, but not with certainty.
maybe Mav-Jp can review the same …Wind is your answer
make the same video with null wind at all altitudes and you will see a circle with a constant pull
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and btw the FM is totally different
look at the 360 deg max G turn
DCS degrades much lower than BMS
not to mention of course the accel capabilities….
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and btw the FM is totally different
look at the 360 deg max G turn
DCS degrades much lower than BMS
not to mention of course the accel capabilities….
Revi screw the test up.
Different pylons in each sim. Different drag indexes and so on.
That perfect circle in DCS not realistic at all. BMS still rules the game
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Hi,
It’s not about wind, this is an oval distortion of the proportions in the longitude of the world in Tacview when you load BMS track.
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@SCX:
Hi,
It’s not about wind, this is an oval distortion of the proportions in the longitude of the world in Tacview when you load BMS track.
Could be. I don’t know if it is true or not but it is relevant. However … please explain why projection (distance) it change in time (see what I mean?).
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What do you mean?
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@SCX:
What do you mean?
If the longitude is distorted … why the “circle” is more distorted at the end of the 360° than at the beginning => an elliptic trajectory, I would understand, but why a spiral trajectory?
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If the longitude is distorted … why the “circle” is more distorted at the end of the 360° than at the beginning => an elliptic trajectory, I would understand, but why a spiral trajectory?
Because there is wind as well