Re: [lowcountryBase] non-vented canopy on a low DB jump?
lowcountryBase wrote:
180 ft pca is my lowest mojo flight...i wont go lower
I have personally jumped 38m / 125ft (cliff) PCA'd into knee deep snow over frozen lake with unvented Troll. Also the same spot has been jumped by other jumpers with unvented Mojos and Daggers. Also I have PCA'd a friend from a 33m E (once again to roughly knee deep snow over frozen lake) with unvented Dagger, unvented ACE and unvented Troll. Of course, we have jumped those same objects multiple times with vented canopies as well.
Generally I can say couple of observations :
- Given a good landing area and good PCA, 38m works fine regardless of canopy design. Obviously vented canopy is preferable but you can get away with it with unvented as well (like we did).
- Going lower than that, what also starts to be a HUGE factor is not only the design of the canopy but the size of the canopy and the weight of the jumper. What we have noticed from the 33m E is that for example whereas 70kg jumper with 245 vented Troll can make a very clean standup landing with some flare as well a 90kg jumper with 285 Troll will pound in pretty hard with pretty much barely inflated canopy. The same goes obivously for nonvented canopies as well. Bigger canopy has longer lines and takes more time to inflate so don't jump everything your mate jumps, especially if your mate is 30kg lighter than you and jumps 3 sizes smaller canopy. Or if you do, do not expect the same time under canopy.
- Generally jumps in this range have very small margin built into them so I'd suggest to play this game with as good cards in your hand as you can get. That means good, clean and soft landing areas, good conditions, lot's of protective gear and (reasonably) small, vented canopies. Also good idea would be to work your way down towards this range and not just ask from the internet and go and huck something in the 120ft range. :) We jumped first quite a bit around 50-60m before going to the "below 40" jumps. Also these jumps (at least for me) are more kind of special jumps which you do not do every night, more like once a year for special occasion.
Have fun, don't bounce. Hope this help.