Date: Tuesday, July 29 2008 06:23 am From: Kingsley Hurst To: Ron Parigor Reply-To: Kingsley Hurst Subject: Wing Profiles Attachments: Part 1.1: noname (TEXT/PLAIN quoted-printable 2235 bytes) Part 1.2: noname (TEXT/HTML quoted-printable 4010 bytes) Part 2: DSC03238 (Medium).JPG (IMAGE/JPEG base64 40956 bytes) Part 3: DSC02869 (Medium).JPG (IMAGE/JPEG base64 72078 bytes) Part 4: DSC02898 (Medium).JPG (IMAGE/JPEG base64 58124 bytes) Part 5: DSC02899 (Medium).JPG (IMAGE/JPEG base64 57244 bytes) Part 6: DSC03079 (Medium).JPG (IMAGE/JPEG base64 58398 bytes) Part 7: DSC03081 (Medium).JPG (IMAGE/JPEG base64 49986 bytes) Part 8: DSC03232 (Medium).JPG (IMAGE/JPEG base64 73058 bytes) Part 9: DSC03233 (Medium).JPG (IMAGE/JPEG base64 76154 bytes) Part 10: DSC03234 (Medium).JPG (IMAGE/JPEG base64 75432 bytes) Part 11: DSC03235 (Medium).JPG (IMAGE/JPEG base64 43632 bytes) Part 12: DSC03237 (Medium).JPG (IMAGE/JPEG base64 47790 bytes) Hello Ron, I was just reading your plea to Graham about profiles for the wing. >Graham would you be willing to make up some profile templates so mere mortals could check their plane? I for one will order. Graham sent me the dwg file for the wing profile years ago and only last December, I had some cut with a CAD laser cutting machine. Unfortunately, they are made of plywood because the bloke doing the job didn't have any aluminium. Anyway, they are very accurate but not as easy to use as Alum. ones would be. There is something 'fishy' about the file Graham sent because not all programs can read it and a lot of people have had trouble reading it but we have been able to successfully read it with Auto Cad. If you don't get any better offers, what I could do for you is print out the first 200mm back from the leading edge at various stations along the wing. You could possibly stick them to some 3mm MDF board or plywood or similar and cut & sand to make the profiles. One thing I have learned from the profiles is that there is no reflex as Graham has often talked about. Rather, in the area of the flaps and the ailerons, those sections are scalloped out on the top and bottom surfaces . . . like hollow grinding is done. I think this is in accord with Don Dykins statement in his book that no part of the wings should be flat or straight. Also, I am unable to detect any droop on the leading edge. As you will see in the attached photos, the bottom of the leading edge has quite a tight radius and on the undersurface just rearward of the tight radius, it is almost straight for a short distance but there is no droop. I only wish I had been given the file and had the profiles made when I built the wing. I could have sanded the foam to shape easily then. As it has turned out, I am having to correct some of the surface with filler but I guess that is better than having the wrong shape altogether. Let me know if you would like me to print out the templates for you please Ron. I don't know how to use Auto Cad myself but I can get our Engineer at work to do it for me. All the best from Oz Kingsley