BASE813 0 #1 April 22, 2005 after questions made here and on BLiNC, i am still trying to find info on the burble size depending on freefall speed........... can anyone help me? Share this post Link to post Share on other sites
julesUK 0 #2 April 22, 2005 Selected highlights from a long post DW made on BLiNC about the Potato Bridge PC-mal fatality: However we do know that bridles of 5-6 feet in length work well at terminal velocity. This is because the majority of bridles used in skydiving are 5 – 6 feet in length (measured from pin to p/c attachment). The greater the airspeed, the longer the burble that trails behind a human body. By this logic we could surmise that a bridle of less than 5-6 feet in length would clear the burble and work at sub-terminal airspeeds (if it had enough snatch force to open the container). According to various sources, the average human body in a box position at terminal velocity will generate no more than 5 feet of burble. The length of the burble decreases at lower airspeeds. Turbulence wake extends further than the burble however pilot chutes do not have a history of failing to inflate in turbulence wake (as seen in skydiving). Jules Share this post Link to post Share on other sites
klapaucius 0 #3 April 22, 2005 Some neat pictures that may help with the shape and extent of a burble http://chaos.usc.es/FMMETEO/CLASES/Web_Fluidos/flow_visualizations.pdf Page 5 - the body is not so square, so the bubble is smaller in reality Page 16 - approximate shape of a wingsuit from the side (left) Page 17,18 - very turbulent just behind the object, practically no bubble Share this post Link to post Share on other sites
