PTC Education Forum

A couple teams have discovered an issue where rwdc.exe is not sorting airfoil coordinates correctly. If you see lines crossing the interior of your airfoil this could be a problem for you. The negative impact would be heavier sections. RWDC was designed to automatically sort points from the trailing edge to the leading edge, around the opposite side back to the trailing edge. The program automatically took care of both concave and convex features in the airfoil. RESOLUTION: Manually sort points (from TE to LE, and back on other side to TE) in your input. It does not matter whether the upper or lower surface is first in the list of points. Download and use the updated version of rwdc.exe (version 1.1). Mark Fischer will be posting the updated version shortly on the Getting Started page. Include a NOSORT parameter on your SECTION input. Input format: SECTION name NOSORT 1.0 0.0 ...

You may learn that this is a problem in your solution when you plot sections in GSView and see a straight line between the leading edge and trailing on one side and the curved edge on the other. Duplicate your input and reverse the sign for the y-values for the second half of the list. This way you will have the whole airfoil represented. Ideally data would be ordered from the Trailing edge around the leading edge and back to the trailing edge on the opposite side.

Hi, if you could not attend the Kickoff Workshops on Friday, FIRST has them all posted online. The complete listing of recorded workshops is located on the FIRST site here: http://usfirst.org/roboticsprograms/frc/content.aspx?id=16133 If you'd like to see the PTC workshop on "FIRST Teams Succeed with PTC" please use this direct link: https://www1.gotomeeting.com/register/349213856 This was a 50 minute session presented live in Manchester, NH at the FIRST headquarters building focused on creating a successful robot design with Pro/ENGINEER and managing a successful team with Windchill ProjectLink. Hope you enjoy

Hi, if you are looking for the updated 2010 KOP, it is now located online at: http://www.ptc.com/go/firstkop

On the design can you use ailerons, and where are the pictures of the business jet.

What is the AC location on the tail sizing spreadsheet?? We are also having problems with flow.edf, we have done the fix from the video and are still having issues. When we suppress the wing that came with the project we are able to run Flow but if we don't suppress it we get an error saying "there is no fluid volume in the project. Please check geometry or boundary conditions." Any ideas????