I was getting another set of readings these range from 27,372 to 28,194 in lieu of a 5.25 x 5 prop
129.6 to 133.49 average 131.545 x 10% loss 13.1545 for 118.39 mph /
190.530236 kilometers per hour
He reported 117 kph on page 1
Using my method and some known data I can use my app and pitch speed calc. to get within a few mph / kph. 