Airfoil Sections
Airfoil Sections
(OP)
I have a problem in that I wish, through the use of an Excel Speadsheet, to produce a number of data points that will then be joined together using a spline to create a profile for an airfoil section. Although I have created the Excel spreadsheet with the relevant data (x and y co-ordinates), I don't seem to be able to assign the said data to points on a sketch before joining them together. Is there a way that I can achive what I'm proposing?
All and any help will be greatly recived
All and any help will be greatly recived






RE: Airfoil Sections
If you make a file using this command and save it as a file the extension would be *.sldcrv.
Regards,
Scott Baugh, CSWP

3DVision Technologies
http://www.3dvisiontech.com
http://www.scottjbaugh.com
FAQ731-376
RE: Airfoil Sections
Double-check the curvature comb of your splines. Newly drawn splines force themselves to zero curvature (instantaneously straight) at their ends unless specially modified.
RE: Airfoil Sections
RE: Airfoil Sections
RE: Airfoil Sections
RE: Airfoil Sections
RE: Airfoil Sections
RE: Airfoil Sections
I did some tinkering. Looks like "Curve through free points" and "Curve through XYZ points" have the same curvature problems.
RE: Airfoil Sections
I think what's important is that the fluid flowing over the top surface joins the the fluid flowing over the bottom surface nearing the trailing edge. IM(very)HO
RE: Airfoil Sections
Achieving lift with C2 and C1 discontinuities is not impossible, it's just ineffecient. Also, it can cause stability issues. Ask the test pilot who coined the nickname "Wobblin' Goblin" for the F-117.
As far as roughness goes, I am familiar with that concept (from a college design project involving mortar projectiles). It is the same reason that golf balls have dimples and tennis balls are fuzzy. The principle (as I recall) is to create a thin layer of turbulence to offset the effects that minor imperfections would have on what can never be an ideal shape. This layer actually acts as part of the airfoil, smoothing out the path of the airstream. However, this microturbulence is on a much smaller scale than the overall width of an airfoil.
RE: Airfoil Sections