Hi guys, It is an unsual question and I am a Beginner so go easy on me. I'm still at the early stages of learning all about rc planes and ideally I would like to build a F-22 with two turbines in it. I'm having a hard time figuring out the approx. max air speed of the plane assuming each turbine produces about 80lbs of thurst (combined thrust 160 lbs). Can anyone please tell me how I can do this?

Note: I know the airframe & weight matters a lot in determining the max air speed, but the problem is I can't even find a formula in which I can plug my values in and it will give me theoretical max speed.