Well my knee-jerk response is that whatever our American cousins are using for
the max.mass of their Europa fleet is what we should be allowed, assuming that
they haven't suffered mishaps due to overloading and aren't seeing evidence of
structural failures developing.
An increase to 1420 lbs (645 kg) seems reasonable to me, for Europas with 100hp
or more powerful engines and/or VP propellers.
In my former commercial career I saw one 19 pax seat aircraft given a 7.8%
increase
of max.mass, without any structural strengthening. Just the performance graphs
were altered to show things like increased take-off distance and reject
area requirements and of course reduced single engine climb rates.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=442800#442800
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