PhreeZone 20 #26 July 16, 2004 Pulling the front risers also increases the airspeed of the canopy and the increased airspeed increases airpressure into the canopy. I'm not sure the balence between the loss of pressure due to the change in AOA vs the increase due to the increased speed.Yesterday is history And tomorrow is a mystery Parachutemanuals.com Quote Share this post Link to post Share on other sites
johnny1488 1 #27 July 17, 2004 Your canopy doesnt know what wind is but it sure as hell knows what turbulence is. ie thermals, downdraft, obsticles ect. Ever go below tree line and have the canopy surge forward from the pilot rocking in front of the canopy momenterily? In turbulence, all bets are off. Johnny --"This ain't no book club, we're all gonna die!" Mike Rome Quote Share this post Link to post Share on other sites
NewClearSports 0 #28 July 19, 2004 Hey I know the answer to this, I just finished Brian Germain's Canopy Course last week. Pulling on your Front Risers under normal flight will not cause your nose to fold under unless you somehow pulled so far as to have the relative wind hit the top of the canopy (not very likely) or you did something to loose your line tension (More likely). Actually we completely loose our line tension and colapse our canopy on every jump, but luckily it only happens when our feet touch the ground and our weight is then supported by the ground. At this time we don't care that our canopy folded over. So to keep this simple, keeping your lines tight is the most important thing, feeling positive G's in your harness is a good thing, feeling light in your harness is a bad thing. So the next time your flying your canopy pay attention to what manuvers cause you to feel heavy and what cause you to feel light. In turbulance stick with moves that make you feel heavy. P.S If you can't attend Brian's course, at least buy his book, it is in my opinion a must have for every skydiver! Quote Share this post Link to post Share on other sites
Cacophony 0 #29 July 22, 2004 As stated on pg. 10 of the Australian Parachute Federation's document "High Performance Canopy Handling Manual" http://www.apf.asn.au/apf_services/publications.asp Since almost all canopies are rigged with the A and B lines on the front riser, pulling one riser down does not smoothly change the camber of the wing in the same way as pulling on a toggle. After only a few centimetres of movement a noticeable "step" is induced in the aerofoil and this can have a couple of very undesirable effects. Initially it can cause the airflow over the canopy to separate from the canopy surface causing the canopy to bounce and buck. If more deformation is applied then there is a real possibility that the top surface of the canopy could be pulled down and exposed to the airflow. This would cause that half of the canopy to immediately tuck under (nose roll). Some canopies are more prone to this than others but turbulence could make this happen to any canopy. This is why turbulence and front risering is not a good combination. Quote Share this post Link to post Share on other sites
