Ok, I've updated the Excel spreadsheet in my files directory with a new sheet detailing the Rib Stress Analysis for each of the ribs in the main wing.
Phil.
From: This email address is being protected from spambots. You need JavaScript enabled to view it. [This email address is being protected from spambots. You need JavaScript enabled to view it.] On Behalf Of Philip Lardner
Sent: 28 September 2011 16:25
To: This email address is being protected from spambots. You need JavaScript enabled to view it.
Subject: RE: [Carbondragonbuildersandpilots] Re: Wing calculations
Hi Folks,
I've uploaded another few pages of calculations (Page-20 to Page-23 in the 'Phil Lardner' files directory) covering the rib layout and stress analysis. I've used the root rib as a worked example and will upload the numbers for the other ribs when I get them finished.
I discovered a few more numerical typos in Jim Marske's text - confirmed by him. The text could also be a little clearer when describing how the rib panel centroids are arrived at. I mistakenly used the formula on pg D-1 of Marske's manual to calculate both centroids and got answers different to the examples in the text. It took me a while to discover my error - the centroids are being measured left and right from the spar location and not just from the left as on pg. D-1 - hence my drawing on Page-21 showing the graphical method of finding the centroids!
Comments welcome...
Phil.
