[REL] 4.11m Guide

[Luno13]

More practically, it would model factors such as manufacturing quality, wear and tear, and higher octane fuel.

Selectable fuel grades would also be a good idea.

It seems from from this that you don't have a proper view of what FM "modding" is about

An upgrade/downgrade does not make an FM more convicing regarding specific behavioural properties of plane in flight.

Sometimes it is really just about correcting obvious typos...

What about mistakes like a plane using the wrong engines? upgrade or down grade all you want, it is still a mistake.

This is taken as granted, and it's not what we're talking about.

Sometimes performance figures vary across a wide variety of testing circumstances, and each plane can behave slightly differently. It's impossible to make a sim that is 100% correct in terms of top speed, break-up speed, g-limits, ability to absorb damage, etc. So why not add a bit of variability so that "X is actually 5kph faster than Y and thus is intentionally porked" discussions are a thing of the past. Taking into account the hurdles of wartime production and logistics could make a campaign really interesting.