It's just guessing... but knowing king tech... it would be 35n thrust. I haven't heard anything about it before. BUT... Barry posted about "fitting valves in the 55 and 35 front cover."

I want small engines so I can fly turbines out of small fields. Also... the P-20 is too small for grass, and a 90mm EDF model... and the wren 44 is almost too much for the inexpensive EDF air-frames. (I turned mine down to 8lbs) BUT>.. it would be nice to shave 1/2lb out of the model.

Hooker53: FYI... I wound up, keeping my 44.