[Crumpp]

Exactly. It's the grasp of basics and underlying theory that are not consistant.

You see stuff like this:

First thrust at original 9680lbs (4390,85kg) and 352mph (566,368km/h=157,3244 m/s):

1580hp = 1178014 W
exhaust thrust = 120kp = 1176,798N
Propeller Thrust = (0,8*W)/V = 5991,216N
Combined thrust = 7168,014 N

With the expression:

(0,8*W)/V

Force <dimensionally equal to the Horsepower> with a velcoity component multiplied by propeller efficiency.

And you read a statement that says:

I don't actually calculate the thrust hp

Which speaks volumes. Harri you are very smart guy. It's a shame you never pursued this in a university.

All the best,

Crumpp