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pchapman last won the day on October 15

pchapman had the most liked content!

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126 Good


  • Main Canopy Other
    75,88,135,154,265,265,282, & some rounds
  • Reserve Canopy Other
    2* PD143, 2* Phantom 24, Baby Cobra
  • AAD
    Cypres 2

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  • Home DZ
    (Ontario, Canada)
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  • Years in Sport
  • Freefall Photographer

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  • Tandem
  • USPA Coach
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  • Wingsuit Instructor
  • Rigging Back
    Senior Rigger
  • Rigging Chest
    Senior Rigger
  • Rigging Seat
    Senior Rigger

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  1. Got mine, maybe a week ago, and I'm even across a border in Canada.
  2. I thought it was a pretty common concept that smaller canopies tend to be more sensitive to given inputs. This all goes way back, for example being part of Brian Germain's wing loading chart and all sorts of stuff he has written. Accompanying his chart: But: I also recall that he (and others like me) say not to take things too far -- All that isn't supposed to be an excuse for a big guy to start loading up his canopy excessively 'because it's more docile for me'. So one is still free to agree or disagree with the exact numbers in that quote at the start of this post, about a 1.2 loading for the poster being like 1.0 for a smaller person.
  3. Odd company. Basically there is 60+ years of a few guys fiddling around with aircraft recovery parachute system designs on and off, and getting a few patents, but no product produced or marketed. Their 'thing' was a 3-unit aircraft recovery chute that blows the wings off and has each wing and the fuselage descend under a separate parachute. (Umm..... that's different.) Then in 2018 they hire an ex CEO from BRS, well known for their recovery parachutes. A year later: [Emphasis mine] Then recently they started to get a few awards or development contracts: So somehow they have gotten a real team together and found a little funding. They seem to have a line of recovery parachutes for ultralights etc but I'm not sure if they are really out there in the market yet?? The 'big idea' they seem to have now is to design recovery parachutes for all the eVTOL / Urban Air Mobility vehicles that are being designed in the dozens these days. Will be interesting to see how the company deals with Strong: "Great, we acquired a whole lot of parachute system production knowledge, and they actually have the experience of selling bunch of stuff to a variety of clients!", but also, "So, what's with this sport parachuting and tandem stuff -- you know, where people tried to sue the original company to oblivion even if some accident had nothing to do with the product other than that some idiot used it -- How does this fit in with our future plans at all??" But I don't know much about ASR or the recent ups and downs of Strong... so if someone has more accurate knowledge, let us know...
  4. Generally emergency procedures may assume that you've already made "one try" to fix the issue, and that means one short try. Can't get PC out of pouch? Try once more, but then go to emergency procedures. I would tend to stick with that "one try" idea for an entanglement. With the usual warnings about how people can stretch "one try" out way too long. However, I haven't actually spotted anything on bridle entanglements in the USPA SIM (but I'm not really familiar with it), only more generic "out of sequence" deployments, which it kind of ends up being if the bag is out but PC bridle wrapped around a foot. The SIM basically says for premature container opening to " First, attempt to deploy the main pilot chute for no more than two tries or two seconds, whichever comes first", then cutaway and use reserve. (5-1 Skydiving Emergencies) Huh, "two tries" in there! Well, yeah that works with the qualifying statements but I suspect most instructors would just say "one good try" or similar. For pilot chutes in tow, the SIM does allow 'the two methods' -- cutting away or not cutting away first. And for "partial malfunctions" in general, for all the many many varieties of 'container open but no good chute', the instructions are just to cut away and go to reserve. So, are there specific recommendations about a bridle entanglement somewhere? (Not just from the USPA) They do exist for things like tandems, but in that case the entanglement with the drogue bridle normally happens shortly after exit at altitude, so one can afford to try to fix it for 10 seconds like the UPT Sigma tandem manual says! Skydiving organizations do expect a jumper to try to fix some entanglements -- like with a camera helmet -- Otherwise, why would any organization bother with all the recommendations to have a cutaway system for the helmet! The Aussie APF's great malfunction video series, for horseshoes, just says to cutaway and deploy the reserve -- with the video of the the test jumper doing that, but with little tension on the main risers [Edit: fixed from 'reserve risers'], the reserve fires into the mess -- but clears it. (Even with a tersh, there's a fun jump...) I only skimmed the video but didn't see a specific Entanglement mal. One thing I wonder about entanglements is what to do with the RSL -- as that will fire the reserve as one cuts away before pulling the reserve handle, if the main risers are tensioned and clear the rig. Does anyone address that? Does having a second of time between cutaway and firing the reserve improve the outcomes in case of an entanglement? The Sigma tandem manual these days has stuff on releasing the RSL first before cutting away, when dealing with various messes behind one's back -- but again, their emergency procedures tend to happen at a higher altitude. The USPA SIM does have a section (5-3) where it lists all the ways that an RSL can complicate procedures in the event of an emergency..... but does it actually go through those messy scenarios and what to do about them anywhere?? With a high speed entanglement in regular skydiving, time is very short, and those RSL tabs may not be easy to find in freefall quickly. I figure theoretically it would be better to release the RSL first but in practical terms it is hard to do in a short "one try" time period...
  5. Never was a member.... but when visiting Germany in the summer of 1992, I stopped by at the Lahr DZ one weekend. Put in a few jumps in until the airplane transponder went on the fritz and they couldn't climb high. The fellow in charge maybe took pity on a student roaming the country who had walked to the air base from the local train station, so he didn't charge me any club fees, and gave me free rig rental. Slept on a barracks couch. I think fuel was at military prices, not high European civilian prices, so DZ jumps were cheap compared to pricy jumps at civilian DZ's in Europe. So I got a sweet deal. After a hop and pop to demonstrate I wasn't a total idiot, I did a couple two ways, breaking off at 3000'. ("I mean, it's only a 2 way, why break off up at 3500'?") Looks like Volker Kock signed my log book, though I didn't jump with him. Peter Landry (at least once a Canadian Nationals meet director) also showed up. Rental / student gear was EZ Flyers with Mantas or the super sluggish Laser 288's. They had new Telesis rigs but they were temporarily grounded after some student a few weeks earlier had had a main riser catch under the reserve tray during a mal, leading to him spiralling in and being paralyzed. While I was there someone else renting failed to catch an FXC set to 2000' and came down under the main but trailing the round reserve, the diaper having held it shut. It was the best defended DZ I had ever seen: DZ ops were housed in a large hardened aircraft shelter, complete with siren and rotating beacon as the heavy blast doors opened. Very impressive... but then there's a little C-182 inside! They called it the Yellow Banana I believe. By 1992 after the end of the cold war, at CFB Lahr the F-104 Starfighters were long gone, the Kiowa helicopters were gone, and many personnel were off doing peacekeeping things in Yugoslavia, so it was a quiet place, only a couple years before the Canadian military bases in Germany shut down. I did take some perhaps illegal photos on base, as attached. I had also been to Germany a bunch of times as a kid -- Great fun in the cold war, with so much military hardware to see on the streets and in the skies. Note the "Panzer crossing" sign outside the main gate. That's all for my most minor of exposures to the Canadian military's German sport parachuting club! Cheers Rob.
  6. A lot of people are more likely to follow what they are told when they understand the reasons behind what they are told. There are plenty of dumb, incorrect, and arbitrary things that people are told in life, so backing an instruction up with some reasoning can be helpful.
  7. Although I haven't been in the aerospace industry a long time, I would think that aero engineering isn't the only way to get into the aerospace businees. Not everyone at the companies are doing computational fluid dynamics of air flows or calculating shear stresses in carbon fiber D-cell spars. There's plenty of mechanical & electrical engineering and software coding to be done. So there's a range of engineering fields to study which can be useful both in aerospace and elsewhere.
  8. It was NOT a taildragger, just a plane with a bigger / longer cowl & radial engine. Looked like a Nanchang CJ-6, something like that. The riding mower and the plane off to the side of the runway could be seen in a new news video. Not that any of this really changes the issues as mentioned in the first post. ( https://montreal.ctvnews.ca/video?clipId=2235845 )
  9. Thanks. I had only seen less complete English language news outside of 'la belle province'. On the video, the way Mario explains the lack of vision just at landing, suggests the plane was a taildragger, which makes the visibility issue a little tougher. Lessons indeed about communication at smaller & private strips where it isn't like ground service vehicles and planes are in contact with ATC.
  10. I almost confuse Donald Rumsfeld with Robert McNamara, every time I think of them. Seemed like top-down efficiency experts, who worked both in private industry and government. Both with documentary videos done later in life (by Errol Morris). Although as someone noted elsewhere, McNamara apparently did have doubts about his past, while Rumsfeld never conceded much.
  11. So are there no other requirements other than minimum distances to obstacles, for an LZ size? Eg, USPA (at least in my older 2018 SIM) shows 330 ft to an obstacle for a solo student. So can one open a DZ with an LZ that is a 661 ft circle? Is that sufficient or is there some other rule that would make the USPA say "Nope, you need to have a decent sized landing area, PLUS the 330 ft in all directions." (Mind you, as a novice at USPA rules, I can get into other weird musings about the BSR rules: Trees covering less than 32,292 sq ft are NOT an obstacle? A concrete runway is not listed as an obstacle? So you can put a student LZ ontop of a 100' * 100' forest surrounded by runways & taxiways? Either I'm missing something or the BSRs in this case are way too lax compared what any actual DZO would do.)
  12. The website seems to work for me. Even jumpshack.com redirects to them. Aha.... "plabsinc.com" works. "www.plabsinc.com" fails. Despite the latter being the link on their facebook page. Although even for the version that works, the intro page is blank except for a "Skip" link to the real page -- Maybe the first page had some deprecated Flash animation or something that is so, I dunno, 2005?
  13. Anyone can become a dropzone bum. It takes more work to get a decent job / career. Which can then pay for lots of skydiving. (Like TampaPete said.) Everyone likes the "right" to do whatever they choose in life. But young adults often can use a boost / support from parents to get an advantage, and that financial power does give them some leeway to impose conditions. One can argue about those conditions, but one can't always avoid them...
  14. Yes I meant "the whole point" in the context of skydivers using tunnels, as one of the reasons skydivers want to use tunnels. Rather than the obvious "The whole point of tunnels, which are commercial enterprises, is to make money for their owners". Even in skydiving I have seen waivers where one has to state that one is "fully recovered" from any injury. Bad ankle, dodgy shoulder? Doesn't matter, you can't do the first jump course unless you claim to be perfectly healthy, as the DZ doesn't want to play the role of giving expert medical opinion. I think we agree on the liability thing.