Thanks for all the help folks.
The details are
flying weight 1.4kg
46” span, 8.5” cord
the motor is a graupner compact 345z #7738
1500Kv, 7.2 - 11.1 v, 20 - 35A, spinning an 11x6 on 2s and 10x6 on 3s
for the 10x6 the blurb quotes 27A and 11x6 - 32 A. and states the motor is compatible with a model between.75 and 1.5 Kg auw
As I said in my original post, even using the higher volts available from the 3s lipo, the current draw is well outside these guidelines. Hence my uneducated confusion.
The replies trend toward trying a lot smaller prop and try and ascertain if the power train is a: incompatible or as I think b: the power train is incompatible given the prop size / efficiency..
Where did I put my glow fuel....🤔🤪