[AIRdomination]

Tests with the BI-1 by the Russians shows the first signs of transonic speed problems. ALL aircraft back in that time period should have this problem (maybe not as severe). The closer a plane gets to the speed of sound, aka: the transonic range, the plane will have lots of pressure going at its airframe. This has also been noted Historically with a P-38 that was in a dive, and coulnd't pull out even though the pilot was pulling the stick up, it still pushed down.

The BI-1 and BI-6 are historically correct when they loose control at speeds around 750km/h.

In the BI-1, sometimes you'll have to shut the rocket engine off so that you can slow down if you are near exceeding the speed.

The BI-6 solves that problem a little bit by adding Ramjets to the wings. Once you are fast enough, ramjets will work (thats how ramjets basically work) and once your ramjets are working, you are suppose to turn your main rocket motor off. The rocket motor is ONLY there for take-off, or to get you going fast enough. If you have just the two ramjets running, your plane will be flying at a smooth speed (unless you're diving) and it won't exceed its critical mach number.





PS: The BI-6 is not over-powered by any means. 2 ramjets plus a rocket motor will surely give you that kind of propulsion.