Originally Posted by
WLIU
The industry is disagreeing with you. Vortex generators are light, easy to install, and have a great bang for the buck. You see vortex generators on Super Cubs and Huskys. Slats that are fixed force a full time performance penalty and movable slats are more mechanically complex than you think. Take a look at a Helio. You have to design the mechanism so that the springs are chosen correctly and the roller mechanisms for the support arms never jam on their rollers. And to select the correct springs for a moveable slat you have to calculate the dynamic Q for the speed that you want the extension to occur at, deduct the mechanical resistance in the system, etc.....
The industry answer is that VG's are common and slats are not. Hmmmmm......
Best of luck,
Wes
N78PS