ORIGINAL: Doug Cronkhite
I think the biggest reason to add stab fences is if your airplane is lacking yaw stability. As canopies get larger, and move further forward, you need to increase the yaw dampening to account for the increased area ahead of the center of pressure. It doesn't take much especially if you're adding those fences out in clear air. If you're running a contra, you'll likely need even less.
Hi Doug,
Why do you suggest that less ,I assume fence, is likely to be needed with a contra.
We have been experiencing the opposite. At least some have , ie us contra users.
When a contra is fitted to most existing models a loss of yaw stability is noted.
Brian