Using the `` 
'' method, a more detailed empty weight estimation can
be performed. Statistically the weight of components sums a factor
times the wetted area of the component. From the sketch, we estimate
the exposed areas. The factors for a fighter type aircraft and the
weight on our aircraft can be seen in table 3.1.
Table 3.1. Components weight estimation.
Since composite materials are used, the total figure should
be multiplied with 0.95, but this still gives us a empty weight fraction
of 0.778, contradicting the prevously calculated 0.57. The difference
could indicate that this method does not scale very well. For example,
we will propably not have any minimum gauge composite anywhere
on this aircraft. I also have my doubts on using the fuelled-up wieght
when calculating the ``misc'' weight, since obviously 43% of our total
weight is fuel!
This section requires further investigation.