On Wednesday, October 3, 2018 at 12:19:17 AM UTC+2, George Haeh wrote:
My Air Glide S feeds data to my Oudie which is recorded in the IGC file at 1Hz. Supplementary data is TAS, GS, TRK, VAR. You can determine gusts in the x and z axes from that data (without heading, you cannot determine gusts in the y axis).

I would like to see a 5 minute buffer with the attitude and 3-axis acceleration data which the Air Glide Sensor Unit produces at 20 Hz.

We are seeing a number of unexplained accidents and are conjecturing among control problems, structural failures, incapacitation and gusts (my own experience).

My take on incapacitation as a possibility is that while quite possible, it seems more conjectured with gliders than the record shows with powered aircraft.

That said any degree of hypoxia can degrade capacity and lead to a suspected loss of control or structural failure.


All good and well to have 1Hz logging and a buffer or whatever, but most (all?) loggers keep this in volatile memory/RAM and only periodically flush to non-volatile storage, so just about no crash ever gets recorded. It's a tricky problem as volatile storage has write limits that would (possibly) be hit too early in their life if every fix was written out.