CRUS EDR mode, am I using it right?
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I’m getting strange results when using the EDR mode, like the plane being quite slow and awkward to control, but still needing quite some throttle to maintain.
For example, say I’m flying a jet with 6 amraams, an ecm pod and two fuel tanks. EDR tells me to fly to about 230 kts. To keep that speed I need about 5000 pph. The plane flies with a fair ammount of AoA, and wants to pitch up due to the nose-high attitude.
If I instead accelerate to, say, 350 kts and decrease the throttle to get a fuel flow of 5000 pph, the jet deccelerates, but still settles at a higher speed than what EDR says, with lower AoA and easier controls.
Am I doing something wrong? Other modes, like RNG and HOME seem to work just fine.
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I’m getting strange results when using the EDR mode, like the plane being quite slow and awkward to control, but still needing quite some throttle to maintain.
For example, say I’m flying a jet with 6 amraams, an ecm pod and two fuel tanks. EDR tells me to fly to about 230 kts. To keep that speed I need about 5000 pph. The plane flies with a fair ammount of AoA, and wants to pitch up due to the nose-high attitude.
If I instead accelerate to, say, 350 kts and decrease the throttle to get a fuel flow of 5000 pph, the jet deccelerates, but still settles at a higher speed than what EDR says, with lower AoA and easier controls.
Am I doing something wrong? Other modes, like RNG and HOME seem to work just fine.
You are doing everything correct. The EDR mode computes the required airspeed for the maximum flight time at the altitude. This airspeed equals to the speed of minimum drag (i.e. minimum thrust required → minimum fuel flow). It doesn’t care about the maneuverability of the jet. Same applies for HOME (the most fuel-economic flight profile) and RNG (maximum range = the best fuel conservation at the altitude) modes.
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I’m getting strange results when using the EDR mode, like the plane being quite slow and awkward to control, but still needing quite some throttle to maintain.
For example, say I’m flying a jet with 6 amraams, an ecm pod and two fuel tanks. EDR tells me to fly to about 230 kts. To keep that speed I need about 5000 pph. The plane flies with a fair ammount of AoA, and wants to pitch up due to the nose-high attitude.
If I instead accelerate to, say, 350 kts and decrease the throttle to get a fuel flow of 5000 pph, the jet deccelerates, but still settles at a higher speed than what EDR says, with lower AoA and easier controls.
Am I doing something wrong? Other modes, like RNG and HOME seem to work just fine.
Same strange feeling here and I do not think it is perfectly correctly implemented since as Huesudo, I have to add power to keep such a low speed at such a high AOA (back side of the flight curve).
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For that type of config with approx. 9000 lbs of fuel, 230-235 is the correct airspeed. I’d have to test it out and see how it feels. 5000 pph might be a little high. I’d expect something like 4300 to 4500 pph.
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Bump.
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the modeling of the avionics, is more detailed than both the fluid dynamics and the mass calculations, i would assume.
EDR mode will seem odd if you’re loaded as a HI/LO or a 1/2 or whatever, it’s for holding patterns and range estimates , or fuming to a tanker or home. Work with the trim, you will commonly have a +AOA with a FPI below the horizon between -1 and -5 ', even more if you are using autopilot. you might feel like you are constantly on approach, remember the f-16 has one of the slowest cruising speeds of any supersonic jet in the fleet.
Just use it as a marker point, to see how much flight time you have left. Personally I use the HOME feature to give me optimum altitude for return , then I switch to EDR to gauge best speed at the altitude.
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Bump.
Ties in rather well to our conversation the other day about the Fuel Flow. This is kind of what I was hinting at the other day, I would like to know what equations the code is currently using to compute these numbers, and where that data comes from (The constants needed for the equations). Figuring that out might help provide an alternate avenue to the other issue we were discussing and improve the AI Bingo piece.
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Ties in rather well to our conversation the other day about the Fuel Flow. This is kind of what I was hinting at the other day, I would like to know what equations the code is currently using to compute these numbers, and where that data comes from (The constants needed for the equations). Figuring that out might help provide an alternate avenue to the other issue we were discussing and improve the AI Bingo piece.
I do not know if it is an equation of a data table inside de code (?) … I do not think it is way different much in BMS than before in previous version so I guess that you should be able to check the answer in SP4 code …