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    Cypres 2

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    Pretoria Skydiving Club
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    Wing Suit Flying

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  1. DHemer


    Keep the BASE canopy bashing to the other forum Back to the Epicene 2 it looks like the ZP on the nose has been has been added to the nose and the trim and been changed. I think these will make this a much more well rounded canopy as beside the sponsored athletes I have not heard many good things about the canopy other than the opening performance.
  2. DHemer

    Altimeter Combos

    Digital on the wrist, mostly for under canopy Audible in my helmet because as much as you shouldn't it is easy to loose altitude awareness in a fast 4 way jump. Having something tell you you are nearing breakoff is not a bad thing Analogue on my mudflap for wingsuiting and it also works for sitflying
  3. DHemer

    Rafale vs. Freak2 ?

    = VTEC I could get behind a wingsuit with variable lift profiles (aerofoil) as speeds increase
  4. DHemer

    Using a Slink to attach bridle at d-bag?

    The discussion is not about bridle to canopy but rather where the bridle exits the dbag.
  5. DHemer

    Container WS friendly

    I was comparing a 30" ZP with 30" Skysnatch.
  6. My understanding is it is the aspect ratio (AR) that makes the biggest difference. 7 cell parachutes are usually around 2:1. Twice as wide as they are deep. 7 cells are typically also more "square"/"Less elliptical" which you have mentioned, but this does not have to be true. The trade off is the lower the aspect ratio the less efficient a wing is. The larger cells compared to a 9 cell also result in a top skin with more deformation which further reduces the efficiency of the wing. For comparison from Aerodynes website, they list aspect ratio and planform factor (PF -how tapered the wing is) Smart (7 cell reserve): AR=2 PF=0 Pilot 7 (7 cell main): AR=2.3 PF=8.57 Pilot (9 cell main): AR=2.51 PF=6.6 Zulu (9 cell higher performance main): AR=2.75 PF=10 So the Pilot 7 is more "elliptical" than the Pilot when compared by Aerodynes formula. There is so much going on in how a canopy flys and opens that the planform is not meaningful. John Leblanc knows best: https://www.youtube.com/watch?v=f-mUyy1fhjE
  7. DHemer

    Container WS friendly

    +1 for skysnatch. When I started jumping my freak I was getting PC hesitations of around 1second or so. The PC would get end of the bridle and then it seemed to struggle to get the d bag off my back as it bounced around in the burble. This was with a 30" ZP pilot chute (200jumps) and a container with open corners. I tried working it out on the ground and sending pics and video to people for advice but I tried the skysnatch and it solved this immediately. I will admit my technique was probably partly to blame as I was probably not giving the PC clean air to work with but the skysnatch didn't seem to care. On FS jumps I could feel a difference in that when the dbag reached linestretch I could feel it. My interpretation is the PC was pulling with more force than my old one. It is a lot of money but I would buy another one
  8. DHemer

    Sticking on a 2 piece tracking suit

    Please remember your leg straps will now be covered and could be forgotten. Your life depends on putting these on correctly. I suggest you get someone with wingsuit or tracking suit experience to give you a gear check. It is less likely in a tracking suit than a wingsuit but it should be considered Also be sure that the waist is tight enough to prevent the pants sliding down in flight
  9. 3M or similar double sided tape is plenty strong for mounting a flysight bracket. I 3D print plastic mounts for flysights and they all get stuck on by double sided tape onto the helmet. This makes it a real pain to route headphones if you are doing more than just recording. it is also needs to be on the helmet for ppc comps.
  10. DHemer

    got my WS1 this weekend

    My personal best for time in a ppc competition in a phantom3 was around 50s (1000m vertical window). There are people who have done over 60s. This does include a dive and flare but sustained vertical speeds of 70km/h are achievable. 10kft~3km Which translates to around 180s freefall time at which point you will be rather tired ;) So yes 2min should be achievable I am 6ft and 70kg without gear for reference.
  11. DHemer

    Smartphone GPS?

    Refresh rates of almost all smart phone GPS devices are too slow for meaningful data in freefall. Some apps may use the barometer for altitude instead. There are a few apps you can look at https://play.google.com/store/apps/details?id=com.platypii.baseline https://play.google.com/store/apps/details?id=com.PFM.LDVario
  12. DHemer

    Squirrel AURA

    The problem is that since the Aura was launched the big suits have evolved a lot so people are rather going to buy a newer generation suit with more jumps on... Wingsuits are a bad investment so its been to just jump them
  13. DHemer

    Pilot7 canopy

    I have as many freefall jumps on mine as WS jumps It is faster opening than the normal pilot but the only painful openings were from pitching going too fast in the WS and getting flicked . If I know the next jump is terminal I push the nose in a bit and give the tail and extra roll or 2. For me it is acceptable. Depending what canopy you are used to it may not be, I don't like my canopy to take 800-1000ft to open.
  14. DHemer

    Pilot7 canopy

    No complaints with my canopy 137 loaded around 1.3:1, ZPX fapric, ZLX lines I wanted the smaller pack size but i was not sure on the long term durability of the lpv bottom skin so I went all zp Packs into a 135 container easily, opening are brisker than my old 140 pilot. Steeper trim than the regular pilot but fun to fly, surprised me how responsive it felt for a 7 cell. Its fine for both regular freefall and ws jumps.
  15. DHemer

    Non-Incident analysis

    I am not an instructor but from the top of my head, been a while since I refreshed the student training. Biplane - fly the front canopy with small control inputs to the rear risers. leave brakes stowed. PLF for landing, no flare Side by side - leave brakes stowed, steer with rear risers from outer canopy to keep canopies together, pulling an outer riser could induce a down plane. PLF for landing, no flare Down plane - I think the training is now to cut away. When I was a student it was to steer the canopies towards each other to get back to a side by side. No improvement after 5 seconds then cutaway. I agree a 2 out does automatically downplane. My feeling is that it is normally for some asymmetric canopy input that causes this and is usually avoidable