On Jun 18, 12:03*pm, Andy wrote:
On Jun 18, 9:58*am, Mike Schumann
wrote:

Both aircraft were presumably equipped with flight recorders (since they
were participating in a contest). *

Both flight logs are published and it is easy to see where the paths
of the 2 gliders met. *That time agrees within 3 minutes with the
accident time published in the FAA prelim incident report. * With both
loggers recording at 4 second interval it is not possible to see
exactly how the gliders met, at least not with my viewing software.

One of the aspects that NTSB reviews after a mid air is the visibility
each pilot had of the other aircraft in the time leading up to the
event. *I'm sure the logs will provide better than usual data to
support such an investigation but I have to wonder if NTSB will take
the interest since this was a no injury accident.

Maybe a careful analysis of the log data by the soaring community
would gives us more insight than the NTSB report.

Andy

A few years ago there was a collision during a ridge running
excursion. Based on the surviving pilots recollection, the wreckage
debris and the damage to both sailplanes we were able to forensically
reconstruct the flight path of both aircraft up to the point of the
collision. I worked with an engineer who took all that data, along
with the information in the flight handbooks of the sailplanes and
such and from that we created spline paths and keyframes to create
bank angles and trajectory. I took that information and created a
fairly accurate animation of the collision.

The creepiest part of that was when I put the camera in one of the
glider and watched from the "pilots" POV as the other glider slid
right in to him.

The result was a broken wing in one glider and a uncontrolled crash
that resulted in his death, the other pilot bailed out and survived.

Brad