Hello Developers, is normal to fly to .59 or .64 Mach with CI 5 or 6? Its not very slow?
Mach Speed
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Post by poyraz_tr51 (
March 30, 2026 at 12:46 AM ).This post was deleted by Jet-Pack (IPACS) (March 30, 2026 at 9:43 AM ). -
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We need more data from real aircraft to fine tune this.
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Post by poyraz_tr51 (
March 30, 2026 at 12:18 PM ).This post was deleted by the author themselves: Mistranslation. (March 30, 2026 at 12:21 PM ). -
We need more data from real aircraft to fine tune this.
Okey thanks you
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Hello Developers, is normal to fly to .59 or .64 Mach with CI 5 or 6? Its not very slow?
You can't fly a managed speed below CI0. In your screenshot it's greendot which equals ~max range/endurance speed.
So that speed seems to be ok. Note that the CI depends on the operator setting.
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It's been a while, but I had access to Gulf Air's CAE sims out in Bahrain. We would either freeze the fuel, or set cost index 0. We would get minimum fuel burn and maximum range when using 0, managed speed was always available, and the cruise Mach was nowhere near as low as shown in that pic. This was the -314 version.
Green dot is best lift-to-drag ratio.
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You can't fly a managed speed below CI0. In your screenshot it's greendot which equals ~max range/endurance speed.
So that speed seems to be ok. Note that the CI depends on the operator setting.
Reading more into it, I was not aware that the operator can change the performance behaviour of each cost index number. So cost index 0 being equal to green dot is not something across the board. I learn something new every day.
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You can't fly a managed speed below CI0. In your screenshot it's greendot which equals ~max range/endurance speed.
So that speed seems to be ok. Note that the CI depends on the operator setting.
You didn't understand what I meant
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Reading more into it, I was not aware that the operator can change the performance behaviour of each cost index number. So cost index 0 being equal to green dot is not something across the board. I learn something new every day.
To my knowledge cost index 0 should be about 5% faster than green dot. The fuel flow is almost identical (green dot being the lowest fuel flow per distance traveled = best glide speed in a jet = best lift to drag). But of course the green dot speed also changes with temperature because of Mach effects on airfoil change best L/D.
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You didn't understand what I meant
I did, but you apparently didn't understand my reply.
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We would get minimum fuel burn and maximum range when using 0, managed speed was always available
= ~green dot.
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= ~green dot.
As already explained, cost index 0 did 'not' = green dot
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As already explained, cost index 0 did 'not' = green dot
You wrote that you were flying min fuel flow and max range = ~ green dot....usually...as jetpack explained as well
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You wrote that you were flying min fuel flow and max range = ~ green dot....usually...as jetpack explained as well
I think reading comprehension is not your strong suit. Read what I typed, slowly - POST 8#.
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I think reading comprehension is not your strong suit. Read what I typed, slowly.
The problem isn't my reading comprehension but your apparent lack of knowledge.
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You can't fly a managed speed below CI0. In your screenshot it's greendot which equals ~max range/endurance speed.
You have a habit of posting nonsense on here. Managed speed is available at Cost index 0, and Cost index 0 gives max endurance, green dot gives max range speed, but it depends on a number of factors
You fail to understand the difference between max endurance and max range, once again wasting people's time on here.
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You have a habit of posting nonsense on here.
You fail to understand the difference between max endurance and max range, once again wasting people's time on here.
Looks like your personality matches your avatar.
Guess I must have been missing something in +25 years flying Airbuses, Boeings etc. IRL.
Do you know what ~ means?
Not going to reply to you anymore. -
Not going to reply to you anymore.Thank heavens, you are insufferable.
