Hi there Broken. I weighed the fully assembled model batts etc today, including it's new chunk of lead, all ready to fly except for fuel and it weights 4Lb 5oz (69oz) or 1.980Kg. It has a wingspan of circa 1 metre and a 190mm chord which gives a wing area of 0.38 Sq metres. or 640 Sq inches(4.4 sq/ft) so I figure the wing load is about 9.2 sq/inch-oz or about 1Lb sq foot.
Where have I gone wrong?