ORIGINAL: nine o nine
How about measuring the center lines of the wing tube socket and anti rotation hole....maybe the Barth design is not like this but there still should be a line of centers. Wouldn't that be the AOI??? Mitch
nine o nine you are correct and by doing this is how I realised what was happening, but by this time I had made a jig that the centre section sat on, used this to determine my 2 deg neg AOA and made my cabanes, I did not realise my mistake untill I had made all my wing struts and was setting up the complete model.
tmac