Rain And Sound At -51c
I have been studying the ice particle icing issue and would like to communicate with the pilot and others regarding the conditions experienced, especially the sound characteristic reported during the apparent rain event at -51C. He reports a "sound of the plane getting pelted like an aluminum garage door". It would be interesting to characterize the sound quality to better identify the conditions. There are also a number of other questions that he or others may have observed that may be meaningful.
I believe I understand the "ice particle icing" issue and would like to wrap it up. If the pilot you quoted wishes anonymity, that is certainly alright. I would simply like to receive his observations. As a point of reference, I am a chemist and a pilot.