[1.08.03b]Aircraft Desing Log errors

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[1.08.03b]Aircraft Desing Log errors - 3/6/2021 9:45:50 PM

zgrssd

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Joined: 6/9/2020
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Both the Weight/Horsepower Ratio and the Wingload claim to be using the weight affected by Gravity - but I got the exact same values for the starting designs on a 0.56g and 0.33g planet. So clearly they are not affected by Gravity.

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RE: [1.08.03b]Aircraft Desing Log errors - 3/7/2021 11:04:06 AM

zgrssd

Posts: 3385
Joined: 6/9/2020
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Okay, I am a bit more uncertain of the exact extent of the error:
While the values do not change in the log, we do get very different results from formulas that depend on the two - like the range.
So I asume they work, it is simply a faulty value that is displayed. Wich unfortunately makes analysing that whole Aircraft design process a unsolveable riddle.

(in reply to zgrssd)

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RE: [1.08.03b]Aircraft Desing Log errors - 3/7/2021 9:23:44 PM

zgrssd

Posts: 3385
Joined: 6/9/2020
Status: offline

Okay, I think I got a somewhat full picture of the various errors now:

Wingload and Horsepwoer Ratio:
- for any given set of Engine, Wings surface and Weight these two values in the Design log seem fixed. Air Pressure and Gravity are not taken account off.
- however, it seems that a correct actuall value is calcualted and used for the other formulas - I noticed wild discrepancies in all values that use these
- the bug thus seem to be purely on the display side of things

Weight:
There seem to be 2 different values used, but not properly indicated:
- the innertial mass. Unaffected by gravity, used for stuff like Horsepower/Weight ratio
- the liftable mass. Affected by gravity, used for stuff like takeoff speed or max speed

Aerodynamic:
- based on it's uses and the goals for this value (keep <50), I thinkg "Air Drag" or simply "Drag" would be a better term for it
- you really should be having a total in the Design log

Limits:
Critial (Air) Speed, Critical Ground Speed, the 2nd Max Speed that sometimes appears - those all could use proper names. But I am not sure what they even represent, given that they have no proper name and only a description to go off.

Prediction/Design:
I would say that the Horsepower Ratio, Wingload and Drag are the 3 most important figures for designs.
Gravity and Air Pressure would be about as important, but are already worked into the first 2.
So they realy should be shown during the final Prediction step and anything that adds Drag should be properly indicated in the choices

(in reply to zgrssd)

Post #: 3