accumack

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Everything posted by accumack

  1. Has anyone done a break down of actual cost per member? I'll bet it is much lower than you think! History is important to save. Without history skydiving would not be where it is today. Having been around since the early days I know a lot of the history of the sport. Very few of today's jumpers have any clue of how their equipment or discipline has evolved! There are so many wrong "facts" floating out there that some people take for gospel and it is important that history is correct so you don't repeat the mistakes over and over! A very few number of people for what ever reason or personal agenda are trying to influence the majority by trying to make the loudest noise. I say look into why they are fighting so hard. Did they get snubbed or is it they aren't making money from it? It must be something to put a burr under their saddle (without history you wouldn't know that was a thing)! Just my 2ç
  2. Para-Flite had some Para-Plane Couds were made with Zero porosity fabric early 1970's I doubt we were the first production canopies. They were not marketed that way. Some people nick named them Crispy Critters. I think probably the Barrish SailWing was the first back in the early 1960s. Parachute DeFrance had the first modern ZP fabric that PD and others copied. Raven Industries (balloons) did some plastic film parachutes earlier than that; But there could be others.
  3. Back when I was jumping I could pack in under 5 minutes. The K.I.S.S. principle still works.It's like anything practice makes perfect.
  4. Sky Diving is dangerous and has been since the beginning! However there are things you can do to lessen the danger.
  5. A giant in this sport! R.I.P. Dave say hi to Joe Smith!
  6. When I worked at Para-Flite we did lots of work with domed sliders and also lipped sliders. As a matter of fact we used them on our cargo delivery systems in the mid to late1970s up until the time I left in 1995. Now having lines dump due to bad rubber bands this can cause an out of sequence opening and no slider will prevent that. If the canopy is out of the bag before line stretch it can spread. Without tension on the lines the slider cannot contain/restrict the opening as the canopy has started to inflate. Domed sliders can increase the snatch force create a spike in felt opening shock. I had many instrumented jumps measuring g forces some with very low g forces felt harder than much higher g force openings due to the length of time the forces were occurring. Out of sequence opening can kill or injure.
  7. I was 16 a couple days after my birthday January 12, 1969. Early 1960s an airport was built next to our house and a few months or so later Steve Snyder moved his drop zone there from Valley Forge PA. From then on I wanted skydive so At 16 I did. I had to wait a few days for weather to jump. This January is the 50th anniversary of that jump! That jump is the best thing I ever did!
  8. We heard about some counterfeit Safety Flyer and Safety Star canopies even saw a few. We were not able to track down the manufacturer. Para-Flite was part of the canopy stamp not a second stamp. Also manufactured under F.A.A. TSO C23Bb was part of the stamp. Serial numbers for the Safety Flyer started with R1- Safety Star R2-. if you have any more questions let me know.
  9. First off the deployment brakes were not set, the slider is on upside down and it appears to be a copy not the real Safety Flyer as the stamp is wrong. I put over 500 jumps on the original Strato Flyer and many on the Safety Flyer prototypes. If you have any questions you can message me here. I ran the manufacturing facility for several years until we trained someone to take over.
  10. It sounds like a cheap ass company! When I worked at Para-Flite it didn't matter if you were the original owner or not. We fixed the canopy. I guess it's still a trade secret on making sure a canopy doesn't turn. It isn't just bias in the fabric.
  11. This funny Para-Flite Inc used the Evolution & Evo name back in 1989 through 1995.
  12. If you had a center line on a spring loaded pilot chute it could limit the jump/ launch of the pilot chute.
  13. If 1979 36 way was at the Nationals then it was Richmond, Indiana.
  14. Having done hundreds of test drop when I worked for Para-Flite here's my take on it. Most dummy landings were more or less down wind. Most test drops are done from a side door of an aircraft so the dummy and canopy are facing perpendicular the jump/drop run. Due to the forward throw of the aircraft the deployment happens mostly horizontally. As the forward throw is dissipated it becomes vertical. The initial inflation one side of the canopy is higher as the dummy becomes vertical the side that is higher sees a slightly higher load/ airspeed as the dummy swings under the canopy causing the canopy to turn in a down jump/drop run direction. In the few times the canopy opened facing directly up or down the jump/drop run the canopy continued fly in that direction no turn. This just MY EDUCATED OBSERVATION from many years of drops with no scientific proof. Parachutes don’t care which way the wind blows but gravity has an influence.
  15. Not a Poter as the video says. Landing gear, door and other differences.
  16. Some of Para-Flite's Strato Flyers had only 1 vertical tape prior to D'jango. During the trial Snyder presented the single vertical tape as part of the copying and patent infringement case.
  17. You need to make a skydive and fly a canopy. As you deflect the tail downward it produces drag the opposite of what you want. Otherwise when you pulled the right side of the tail of the canopy it would turn left not right. You will never overcome the the drag produced! But keep thinking and don't get discouraged you may come up with a good idea that may advance parachute or paraglider design.
  18. I have more information as i worked for Para-Flite at the time. I'm not willing to discuss it on a forum.
  19. Have you jumped since you got your certificate 2 years ago?
  20. No part of it had any service life. Jerry Baumchen Towards the end, the cartridges had a shelf life of two years. I regret being old enough to remember this. -Mark The cartridge charge was changed in the 1980s the original was barium styphenate it was changed to black powder.