So, piloteAWARE works with a pi 2b
If you are going to do it without a gps dongle on an iPad, get the NMEA gps app. by alessandro Trebbi, load it and correct it as per Lee's comments further down in this thread.
a bit deceiving the app will show a red status bar, but when you leave the app to start Skydemon, it will continue in the background.
Start skydemon, and remember to set the altitude for objects to +40000,
let it be for a while and make sure that the seeking for gps goes out, (on my setup it seems a bit slower on the gps data.... but it may just be my impatience :-)
good luck everyone and Thanks Lee and Paul for comments and assistance
now comes the serious part, getting the plane out of the shop and trying to locate some gliders :-)
Blue Skies
Peter