[Saburo Sakai]

you can easily make the service ceiling of 10,720 meters with no WEP. or flap
you will need to reduce your mix to about 40% gradually as you climb and add supercharger when passing 5000 mtrs, and trim the aircraft
WEP is exactly that emergency power and is not needed for regular flight
when you hit altitude, the plane becomes less stable and requires little movement of your stick, and your speed will increase when levelled out.


note the altitude on the speed bar in the pics and you will see that the extra 400 mtrs is achievable.

10370 mtrs


10170 mtrs