Re: Fly Reel Drag Design
A wide drag range, in case light tippet is being used (such as with steelhead in very clear water) and the tippet needs to be protected on a very light drag setting. Smooth start-up would also be necessary in this case.
With regard to the drag design itself, like Robert said, the material of the drag (cork, carbon, rulon, whatever) would need to be able to hold up for long protracted runs, in the case of tarpon-style drag slugfests. I am not hugely familiar with the materials used in drags so I can't say what would be best in this case. I'm sure someone else that knows better than myself will be able to weigh in here. However, I know I will be chasing a tarpon on the fly sometime this year, and all I can hope is that my drag holds up and helps me land the fish!
Working out a way to convince my university to allow me to hold my TA office hours on the nearby creek...