Back

2011

UAS has recently begun using Computational Fluid Dynamics (CFD) software to aid us in designing elements of our aerodynamics package.  

Unfortunately time and cost constraints make a true to life simulation a difficult task to achieve, as ideally every component down to the smallest washer should be modelled into the software and then animated to garner accurate results. 
   The UAS rear wing is a fantastic example of how we use the software to aid our design despite our time constraints. By focusing on a small area in isolation, we can more clearly judge how changes will impact our drag and down force characteristics.

In this instance it was found that adding a 15mm gurney strip to the larger lower rear wing increased the overall down force by a significant amount ( ≈ 11%). This produces an extra 14kg of effective weight on the rear at 200kph, with only ≈3% increase in total rear wing drag.
 

   
Back