another 3-ring question

[grasshopper 0]

why won't manufactors make risers with large 3-rings and mini webbing? we know that large 3-rings have a better mechanical advantage, but many canopy pilots want mini-risers so they can pull their slider down.

I checked with the relative workshop and mirage, and both said they won't make them. any ideas why?

________________________________________________________
Abbie drove me to Idaho and all I got was this lousy sigline

[kenneth21441 0]

Just my two cents here...

but I think that the reason could be due to the mini risers have a lot more stress related issues to deal with.. as I have seen where they are recommended to be replaced after so many jumps.. and inspected on every so offten before a jump... by placing larger rings on the riser the manufacor is now saying jump this riser and if it breaks ... you will try to take legal action against them... or give them a bad name saying that they make something that is not worth anything etc..... Its a liability issue.. and i sure would not take that on..........

Just my two cents but somewhere in my thoughts this is true.....

thank you,

ken..

Kenneth Potter
FAA Senior Parachute Rigger
Tactical Delivery Instructor (Jeddah, KSA)
FFL Gunsmith

[nightjumps 1]

Isn't there a weight restriction for the mini-three rings and mini-risers? If so, wouldn't the manufacturers be safe in assuming that if you need large rings, you probably need large risers?

[KellyF 16]

I have seen one pair of large ring Ty-17 risers in my life. I don't know if there is a definative answer other than cosmetics, but the construction specs on a set of large ring Ty-17 risers are going to be different than large ring Ty-8 risers due to the fact that the Ty-17 will stretch more than the Ty-8, and the larger the distance between the middle ring, top ring, and grommet, the more the system as a whole can stretch and go out of spec under load. The solution would be to compress the geometry of the system, but how much? And would it be so compressed that it would be easy for people to misroute it (i.e. placing the loop through the middle ring)?

[billbooth 10]

There is nothing wrong with Type 17 (1") main risers with "mini-rings, for solo jumpers....as long as they are made correctly. Relative Workshop's web page gives you simple tests to tell whether or not yours are. The components of the release system, other than the actually rings, have a greater impact on cutaway forces than the rings themselves. For instance, a dirty cutaway cable, or soft housings, or too short a riser loop, or lack of riser housings in a line twist situation, can all make a much greater difference in cutaway forces than having large or small rings.