[sabreclaw]

I don't know if this is a sturmovik or pilot (me) problem but it seems to be impossible for me to build up speed records in IL-2 stiurmovik. I've noticed that almost every speed record each plane has been achieved in high altitudes, in between 3,000 and 9,000m and yep, i've tried that myself too but it seems to be impossible to build up speed even near those record numbers in IL-2. For example: P-47, as wikipedia says, has maximum speed of 433 mph at 30,000 ft (697 km/h at 9,145 m) but when i try that my plane won't reach even 500km/'h - same thing seems to happen in every plane i've tried. What am i doing wrong or is that just IL-2 problem? It's kinda fun to see how a high altitude interceptor barely stays in the air in those numbers.

And about the superchargers.. Is there a trick to activate higher level superchargers on planes such as P-47D, P-38J or Fw-190A or didn't they just have manually controlled ones?