My method of doing banana ribs for my first and last F1D. The whole model
was flattened to about .010" thick in transit to Kibbie in 2013.
http://www.hippocketaeronautics.com/hpa_forum/index.php?topic=14799.0
On Sun, Apr 3, 2016 at 6:56 PM, linardic_at_yahoo.com [Indoor_Construction] <
Indoor_Construction_at_yahoogroups.com> wrote:
>
>
> Dear all regarding airfoils and ribs. I use thickness percentage to sort
> them and make them from 1 mm thick spring steel stock. I draw them in cad
> very quick 1/16 longer then chord. This is because when sou slice ribs they
> tend to increase In camber and shorten. To make thndorms i wire edm cut
> them very fast and accurate. I use 4 % on wings 2% on stabs usually. As a
> general ruke the heavier the wing ooading the more camber is efficient so
> lpp models I biluild use 5.5. % and manhattans 7% etc. My bottom straight
> line to top horizontal axis is always 1.375 inches so works well with Jim
> Jones ARI rib cutting index. For banana ribs i make the top as described
> and bottom form lower in height for the desired thickness of rib in the
> middle and chqnge tha rc to suit. Usually make banana ribs 0.045 at ends
> and 0.075 in the middle.
> Vladimir Linardic
>
>
Received on Sun Apr 03 2016 - 19:42:47 CEST