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Everything posted by riggerrob

  1. Instead of installing a SMALLER domed slider, I would keep grommet spacing the same, but cut holes in the slider. Once you determine the best size of hole, you could sew mesh over it.
  2. riggerrob

    Proper way to seal reserve

    Sandy Reid invited me to “peer-review” the first version of the FAA manual. I “peer-reviewed” Eric Fradet’s manual ..... all 600 pages, in French ..... and found only one minor variation from Poynter, military manuals, etc. The French tend to use the term “pod” for all types of deployment bags.
  3. riggerrob

    Email from an attorney .

    Yeah! I have provided expertise in four cases. The first was when Dan Poynter asked me to inspect a student rig that hit a building on an airfield. Simple. The Second involved the RCMP asking me to inspect a rig involved in a fatal accident. Simple. The third involved analysis of the risk posed by wind turbines one statute mile from a DZ. Even though there have been no reports of any incidents, the project proved politically disastrous for me. The last involved a personal injury lawsuit launched two years after a plane crash. The case proved financially and psychologically disastrous when my secondary damages (knee surgery, lost wages, etc.) - during the trial - exceeded my losses from the crash. Eleven years later, there are still a variety of loose ends (e.g. wreckage still on public display). Disastrous! Out of four contacts, two proved disastrous! The next lawyer - that approaches me - will get a punch in the teeth!
  4. The simple answer is to only load your first rig at one pound per square foot. When calculating wing-loading, weigh everything you will be suspending under that canopy: yourself, shoes, helmet, clothing, harness, reserve canopy, etc. Err on the side of caution. When in doubt, buy a canopy slightly too large. Large canopies deliver you to the scene of the accident slower. Slower means limping away from a poor landing. Limping is cheaper than all the other alternatives. By the time you are bored with that canopy, you will have almost 200 jumps and will be contemplating wing-suiting. You will be to wear a docile canopy during your first wing-suit dive! Handling - at the same wing loading - really only changes below 150 square feet because their lines are so short.
  5. riggerrob

    The HU Band

    Check out "The HU Band" on youtube.com Awesome ancient Mongolian folk songs, throat sung accompanied by traditional instruments with a heavy metal beat! Brilliant cinematography too boot!
  6. riggerrob

    Racer by Jump Shack

    ————————————————- Most pilot-chutes-in-tow are caused by miss-routed bridles. ..... specifically if the bridle is routed under a flap between the pin and the BOC. Most containers will still open even if you confuse left and right flaps. Whether they close the bottom or top flap first is determined by where the closing loop is anchored: pack tray, mid wall, bottom flap, top flap, etc.
  7. Carrie Radison, June 1957!
  8. Ah! The summer of 1969! The first time we ever saw hippies in our conservative, Southern Quebec town. They were at the bus station in Sherbrooke, transferring to buses headed for lower New York State and the Woodstock Festival. At age twelve, I was too young to join them. Besides, my conservative father would never have given me permission.
  9. riggerrob

    the links in the chain.

    He quit flying his body to fly the camera. The pilots’ equivalent is “dropping the airplane to operate the radio.”
  10. riggerrob

    Navigator Mains

    From where does this theory come? ———————————————————————————— Aeronautical engineering textbooks and pilot ground school text books.
  11. riggerrob

    Navigator Mains

    Most school canopies are made of two different types of fabric: ZP top skins and the rest F-111 (or a similar low-porosity) fabric. Since most of the lift (60%) is developed by the top skin, only the best fabric is sewn into top skins. ZP flies great even after a thousand jumps. Low porosity fabric makes it easier to squeeze air out, allowing quicker packing. Lopo fabric on bottom skins makes little difference to performance because bottom skins are pressureizd from both sides.
  12. riggerrob

    Eyewear protection question

    Visit your local gear store and try on half dozen models of googles. Once you narrow down the selection, take them for a test-drive in a car. Get your buddy to drive down the highway as you hang your head out the window. Remember that freefall is twice as fast as highway speed limits.
  13. riggerrob

    Container flapping on back in free fall

    Ask the rental shop about adding a temporary belly band. The belly band can easily loop through hip rings and pull them forward. This will reduce the “waist size” of the harness ... reducing sideways slop in freefall. Belly bands are popular on large student rigs and huge military free all rigs. Also consider adding a bungee cord to pull both leg straps towards your buttocks. Free fly bungees are standard on harnesses manufactured during the last 25 years.
  14. riggerrob

    countries that accept faa certification

    CSPA requires reserves to be packed by CSPA or FAA riggers. This is a pragmatic policy considering how many Canadian skydivers spend their winter vacations at American skydiving resorts.
  15. riggerrob

    Sigma loop lenght

    Bill Booth said: “There is no need to install a reserve closing loop more than 4.5” long [on Vector 3, Micron or Sigma].” It is amazing how many different reserve containers close neatly with 4.5” loops. I measure Cypres loops from the disc to the top of the loop. I don”t bother with pre-stretching Cypres loops. I just tie them .5” too short with the expectation that they will stretch the last .5” as I close the reserve container. I found that Micro Sigmas are easier to close with 5” loops.
  16. riggerrob


    Halloween night, I was waiting for a bus along East Hastings Street in Vancouver. I shared a brief chat with the Great Lewbowski. A stout woman with a first-year-lesbian hairdo stomped by followed by a wino. The wino put a lot of effort into his costume with a long tangled wig, five-o’clock-shadow, greasy trench coat, one pant leg too short and shoes that were down-at-the-heels. Then a middle-aged couple - dressed as police officers - strolled by. A diabetic was injecting his daily dose of insulin, but why in a trash-strewn alley? A nun in a brown habit greeted everyone with a smile and kind words. A guy dressed like a meth head tried to bum a cigarette off me. His hair was ridiculously short. He was too young to shave and was wearing those baggy grey sweat pants they issue to prison inmates. Then a short guy dressed like a Doberman sniffed my leg. He really nailed that costume with droopy ears, a slobbering tongue and sleek black hair. Then an adult wearing a pink ballerina outfit roller-skated into the middle of the intersection and directed traffic.
  17. riggerrob

    Why do Tandems have 9-Cell reserves?

    It is also worth noting that some of the early Strong tandem canopies (the 520) were 11 cell, I believe. ————————————————————————- Yes. I made a bunch of jumps on Strong 520 mains. They had 11 cells and were all made of F-111 fabric. The sad part is that their sliders looked the same size as 425s. Only the very best packers could make them open softly and reliably. I have suffered tension knots and torn a few Strong 520 canopies. One had a hole big enough to drive a bus through beside a hole only big enough to drive a van through! These holes were through both the bottom skin and top skin!
  18. riggerrob

    Hard Opening = Torn Canopy

    If you send that back to the factory, That can be patched by a local Master Rigger. I have sewn similar repairs without replacing the entire stabilizer, but it took me about an hour. Next time you pack, clear your stabilizers. The sewing skills are more than the average Senior Rigger can handle.
  19. riggerrob

    Dbag size, how tight is too tight?

    Pay a local packer to pack it and tell you if it is a good fit. This is a recurring problem with second-hand year. The correct sequence is choosing the reserve that you want to land after a skydive gone bad. Secondly, choose a main parachute comfortably sized to match your skills, weight, etc. Only then can you start to choose a container that will gracefully accept those canopies.
  20. riggerrob

    Why do Tandems have 9-Cell reserves?

    Sure, but at the cost of opening reliability which is not something you want to trade off in a reserve. I could be wrong, but it's been my understanding that opening reliability is linked to aspect ratio. The lower the aspect ratio, the more likely the canopy will open correctly, fly straight in line twists, ect (all other metrics like WL and size considered equal). ————————————————————————- True! Aspect ratio does affect opening reliability, but it is less of a problem on untapered canopies. The vast majority of civilian reserves are rectangular making them turn slower ...... During my 30 or so reserve rides, my worst nuisance was line twists. The only time I opened a 5-cell reserve, it was so unstable in roll that I barely turned it enough to face into the wind. I only flared 3/4 and slid out the landing on the snow.
  21. riggerrob

    Why do Tandems have 9-Cell reserves?

    Tandem reserves have 9 cells because they are so big, but fabric only comes in bolts 72” wide. Also the higher aspect ratio (span / chord) improves glide and flare. I am so old that I jumped jumped Pioneer Hi-Lifter 370, Parachutes de France Galaxy, PD 360, Strong 425, etc. when they were fashionable as mains. All those canopies were also available as tandem reserves.
  22. riggerrob

    hard openings dome slider?

    I have installed PD “pilgrim hats” on wide(1 23/32”) Type 8 risers. It took a bit of wiggling, but they worked fine.
  23. riggerrob

    Reserve pack intervals

    Not for tandems - Australia is 12 months for Certificate Class B holders and above only. Students, Novices (Certificate Class A), Tandems and pilot rigs are 6 month repack cycles. That's weird. Why? Do reserves on rigs jumped by novices and tandems open with more error than those jumped by experienced jumpers? The reserve pack interval should have nothing to do with who's jumping it. That's entirely an equipment factor and not a factor of skill or currency. ——————————————————————————- Student and tandem gear suffer far more wear and tear than privately-owned parachutes. Students pack sloppily, snag gear inside the airplane, bang it on the doorframe, deploy at “novel attitudes,” drag parachutes through the weeds, leave it laying in the sun, etc. Tandems get jumped every day. Strong insists on an inspection after every 25 jumps. It includes a detailed inspection of the drogue, bridle, D-bag, main canopy ....... and an external inspection of the harness/container.
  24. TC, CSPA and at least and a couple of DZOs all think I am an A##hole, so there is no harm. OTOH some jumpers get upset when you “rat them out the o the government.” I will start by sending private e-mails to Chuck Akers and the Northwest Regional Director.
  25. Sometimes yes and sometimes no. For example, there is a Canadian DZ that quit CSPA and now operates as a USPA DZ. They do not use seatbelts. Belts are difficult to find in their Kodiak and only a few seats in their other plane have access to belts. So that DZ ignores USPA, FAA, CSPA and Transport Canada’s policies on seat belts. I am old enough to remember why seat belt regulations are written in blood. I worked at Hinkley, Illinois in September of 1992. I attended waaaaaaay too many funerals that month.