On Thursday, April 5, 2018 at 8:57:05 AM UTC-4, Dave Nadler wrote:
https://www.youtube.com/watch?v=QEJJ...ature=youtu.be

Being fairly new to soaring, I've taken a fresh approach to the PP problem. What I came up with is a high velocity, large diameter duct (about 3" diameter). This eliminates the uncomfortable constriction of the external catheter at the input end. A high velocity airflow directs the effluent far away from the plane. For the beta version 1.0, the pilot needs to manually open the vent window prior to relieving. I'm planning to implement a fully automated replacement air damper for Version 1.1.

I borrowed the key technology that makes this work well from our friends in the RC community https://www.motionrc.com/products/fm...w_ wcB#qa-tab