Hi.

I can't say for certain, but i can safely say that a lot of gents here would have thrust rating somewhere between 1:1
or 0.9:1. Some are having more thrust than these figures in their planes. I don't know enough about it, but i remember
someone here had flown a model weight in about 25lbs with 13 lbs pusher. It still sounded so cool that people still scratch
build their models. Good luck with your project