Re: [base_rigger] Mojo slider
In reply to:
There is no need for two different mesh sliders.
There are evidently canopy manufacturers who disagree with you on that.
On the topic of slider material, here are some of my opinions (which others may not share, but I'll express them anyway):
I think that many people are under the mistaken impression that sliders of different materials will perform differently from each other at any delay.
At zero airspeed, there is, in theory, very little difference between a ZP slider, and F-111 slider, a large mesh slider, a small mesh slider, and just a rectangle of binding tape holding together 4 grommets. All perform the same function (keeping the lines closer together and slowing the opening) and all deploy in the same way.
The difference between sliders becomes more evident at higher airspeeds, when the air rushing up into the slider will act much more to hold the slider up in the canopy if there is more resistance to the slider itself. As you approach terminal, the difference becomes more and more pronounced.
If you're graphically inclined, picture a graph of altitude consumed by the opening against delay taken. If you plot different sliders, at the far left (zero delay) the sliders are all pretty darn close together. As you move right, the curves open up, with a much greater difference between the different materials.
This is one of the things that helps canopy manufacturers tune their parachutes and sliders--they can tame the terminal openings by changing slider material without effecting the subterminal openings nearly as much.
I guess what I'm saying, quite oddly, is this: Anyone who skipped Maggot's rather ungrammatical one line response ought to go back and read it, because it's actually got some underlying truth that can help your understanding of slider up deployments.
Note: Yes, I understand that the sliders movement creates some air resistance, and that no deployment ever happens at exactly zero airspeed. I've also observed that on slider up PCA's, the opening altitude between different slider materials is much, much less than the difference between different slider sizes, different canopies or the difference in altitude consumed by the same openings at terminal.