On another hand, there are CFIs, the FAA, books, etc.
I've only found one search result that agrees with you, so far, and at least a dozen that disagree, but the one that agrees with you has no math in it, and the ones that disagree mostly seem to depend on the same source info, so that doesn't feel conclusive in either direction.
The Wikipedia page on lift-to-drag ratio also believes weight does not matter to the ratio.
As a side note, your 200km/h example also sounds like it's just not the correct angle of attack or airspeed for the aircraft, so I'm not sure if that example applies?
On another hand, there are CFIs, the FAA, books, etc.
I've only found one search result that agrees with you, so far, and at least a dozen that disagree, but the one that agrees with you has no math in it, and the ones that disagree mostly seem to depend on the same source info, so that doesn't feel conclusive in either direction.
The Wikipedia page on lift-to-drag ratio also believes weight does not matter to the ratio.
As a side note, your 200km/h example also sounds like it's just not the correct angle of attack or airspeed for the aircraft, so I'm not sure if that example applies?