I talked with a scale fellow today (another one of my interests)
Fairchild PT-19
20lbs
18x8 Prop at 7,800 RPM
Generates 16lbs of thurst that is 80% of model's weight.
Since it rotates at 7800 RPM it generates enough thrust and pitch speed to fly the scale model without difficulty in the maneouvers expected of this model.
He specifies model weight, propeller size and RPM with his plans. That makes life so much simpler to pick a proper power system.
oh yea... don't forget the AMPs the beast is sucking out of your poor LIPOs...
Granted no 3D is expected or desired on this model.
Gliders need to climb fast in short time. What did we mentioned before in the thread? 70 degree climb for a competition glider? In that sense gliders behavig a bit more like a 3D model than the Scale bird mentioned above.
In either case static thrust is an important measure... without forgeting the other variables.
Dynamic thrust is much more difficult to estimate with the tools we have on hand...
Now if we put an airspeed sensor, and RPM sensor on the plane... hummm...
Of course... don't forget the AMPs that the power system is sucking of the poor LIPOS...