Originally Posted by
underfire
Did you look at the formula?
Did you look at the formula?
What exactly do you think Window metal frame and near hole reinforcement are? Structural elements perhaps?
Perhaps if you READ the article, you will comprehend where the 25% comes from, or you could continue to blindly argue your point when provided with facts to the contrary.
Read the article, total weight savings 750kg. According to the formula total airframe weight with windows 3000kg.
Empty weight around 40.000kg. Very heavy wings, engines and landing gear........