On Friday, June 9, 2017 at 6:39:04 PM UTC-7, Dan Marotta wrote:
Here's a video
of an Aviator P-124 being jumped at a height of 85 meters (276
ft) and 80 knots.Â* Opening time was 2.1 seconds.Â* I had to review
closely to verify that the chute was equipped with a slider.Â* Note
that the jumper had a 25 second ride after full deployment.




On 6/9/2017 10:40 AM, Frank Whiteley
wrote:



On Friday, June 9, 2017 at 9:20:43 AM UTC-6, Duster wrote:


Mine's a Strong 303 (26' conical; back). Comfy with sheepskin. Here's a video of a model 304 (26" conical; chair) in action with the same canopy I believe. 2011 bailout from a disabled Mustang. Legend states bailout was less than 500', but with what seems a delay in pilot-chute deployment yields a very quick, low-altitude loss safe. Make your own calculations. Isn't the speed and direction of travel at deployment key factors (e.g., Jumping from vertical @ 0 mph results in greater alt loss than at 45 degrees @ 100 mph)?

https://youtu.be/ygcaalz6IRA

Mike


The old Irvin EB80 was reckoned to be life saving from 100ft with 100kts horizontal speed. There was a VTC Open Cirrus that fluttered apart on a high speed pass in the UK many years ago and the pilot bailed and survived with one. I tried to buy one new but there was a 6 months waiting list, so settled for a very comfortable GQ Silhouette which was lifed at 15 years;^(. Replaced it with a Butler, which is fine.

Frank Whiteley





--

Dan, 5J

I couldn't access the video, but 2.1 sec equates to 72 ft freefall. The TSO opening time, 3 sec, is 145 ft. Adding just 2 more sec increases the freefall distance to 400 ft. Distance, of course, goes up as the square of time (1/2*a*t^2, a = 32 ft/s^2).

Tom