[Help] Looking for a mid that flies like a Roc3 but has no bead

[Oklahyzer]

I think what you guys are calling PLH in discussions about stability in disc design is where you're off. Nobody disputes PLH in molding and how it can affect one design from run to run...but it is not a function of disc design, just one of the manufacturing. You can put the parting line anywhere you want, smack dab uncomfortably in the middle of the wing surface if you want to. When you talk about the PLH from disc to disc as part of "nose height", that is not the effect PLH gives...that's just disc design as it relates to center of lift and center of mass. The other thread linked is good info and there was great stuff on DGR at one time if it's still available...both PLH as well as disc dynamics.

Discs are almost four dimensional. There's a lot more going on in flight and design than first meets the eye, and each aspect affects the other aspects, so you can't just focus on bead, nose shape, height, etc. and call it good. You have to consider all of them and how they work together, including the things you can't see easily like center of lift, etc. PLH gets so misused and misunderstood on DGCR it's ridiculous. Yes it has value and measurable use for us, no it's not a golden fleece of disc knowledge. Comparing it on different molds is a waste of time and that mental energy would be better spent actually learning about disc dynamics and mold design, imho. Then at least you can know what you're talking about.

 

[Oklahyzer]

One other thing to keep in mind is that while everyone is focusing on the external faces of a mold design, what is going on inside the cavity on the underside of the disc has a lot of influence on disc flight, too. There are some profiles that you might expect to be pretty stable or overstable, but they turn out not to be so. Gotta consider the sum of all of the parts. The more you learn about disc design, the more you appreciate the designers of the discs we use, and the easier it is not to get too miffed when they don't always perform the way they're advertised. Lot going on, and that's just compounded by the factors involved with injection molding.

 

[ThinAir]

I'll assume you know wing height affects center of lift, curvature of wing(both above and below) changes positive and negative lift, and a bead induces drag which provides resistance to turn.

How you can profess knowledge of wing aerodynamics and either ignore or actually dispute the above basics, IDK.

 

[Oklahyzer]

Ok then. PLH it is.