nitrochute

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Posts posted by nitrochute


  1. interesting to note , that when manley butler designed the mini 3 ring for para flite swift rig (circa 1982) he kept all the mechanical relationships exactly the same as the big 3 ring. however over the years other manufacturers (including booth) changed it to what it is today. WHY?

  2. amen to everything you just said.when pull outs first came out people constantly had problems with them at my old dz.firts,try and get hold of the mfr. and get the official instructions for your rig.next try it on the ground ,several times if necessary.one prob with pull outs is a tendency to release the p/c to close to your bod,it goes back into your burble.

  3. its about strength weight and bulk.nylon is far superior to something like like dacron for canopies.you could make a canopy out of dacron but it would be bulky,and weight would be an issue too.you would almost certainly have to use a heavier fabric just to have

    it survive the opening shock.
    but dont worry,your canopy will probably become obsolete well before you expose it to enough ultra violet to render it too weak to survive opening shock.

    i would be more concerned about thread becoming too weak (since it doesnt benefit from the use of uv inhibitors )than canopy fabric

  4. flourescent colors are dyed using a process that involves acids!that is probably the reason they give out before the other colors.
    secondly and most important, para gliders do not have to remain strong enough to survive an opening shock!!you are kinda comparing apples to buicks!

  5. chest strap only takes 8- 15 % of the load under ideal conditions. but head down is another story. bout 10 years back a well known mfr. was doing some drop tests of their new rig. dummy opened head down,and the chest strap failed allowing the dummy to fly right out of the harness.

  6. i seem to recall them first appearing some 15 years ago.dont know who made the first ones.personally ,i dont get it,but then i m not much on jewelery.kinda reminds me of this guy i knew 30 years ago.made himself a belt using a shot and a half capewell.then he modified his pants zipper by installing a ripcord(2 pin).

  7. line trims are measured above the preceeding value.as for cumulative error,thats why manufacturers have tolerances(paraflite used to be + or - 1/2'' on trim front to back and +or-1/8inch side to side).while front to back will affect performance somewhat, the side to side can put aturn in a canopy ,which is worse.

  8. roger allen only worked for SSE for about 5 years,i worked for snyder(SSE) for over 15.i was there during the hey day of the mk 200 and roger was there during its final days.he really is NOT as well versed as you think on the intricacies of the unit..bottom line tho,if you expect it to save your butt...i would not use it ,get a cypres or some other modern auto opener.

  9. ahh the mk 2000...reasonably reliable in its time(introduced in late 1970)but,it is nothing more than a rate of descent sensor and altitude sensor combined .there were many internal changes over the course of its production run some of which caused problems(i.e. inadvertant firings).to wit:in 1973 the microswitch that the aneroid closed at 1000 feet was changed to different design,known as a rivet switch.the rivet switch could be momentarily closed during line stretch and would fire.to compensate SSE placed an additional capacitor in the circuit to take up the spike.then there were problems with rate switches that would cause the units to go off on landing. and sometiomes they would just go off in a closet,car trunk etc..at the time they were made the only other unit available was the fxc mechanical unit,and they had problems of their own.
    BOTTOM LINE,its extremely old technology and while it MIGHT work ok for you,you really are much better off with a cypres or some other more modern unit. hope this helps.

  10. its not all that unusual to have 2 different canopies with built inturns in opposite drections.if checking line lengnths ,cell heights,full flite settings (compare left to right)doesnt reveal any problem,then chances are good to exellent that the problem is actually material bias.if you look at a roll of fabric real close you will notice that the fill fibers(those running across the fabric from selvage edge to selvage edge) do not run straight across the fabric.that is material bias. manufacturers have had to deal with material bias in building canopies since the early 70s .there is really only one technique to compensate for it.but ocasionally a canopy gets built without corecting for material bias.if your canopy was built without compensating for material bias ,IT WILL HAVE A BUILT IN TURN.and it could be either left or right.