Hi Ontos,
>And If the D-9 wasnt a bomber interceptor or high Alt fighter then what was it designed for?
It was designed as a stopgap :-)
The engine was good for medium altitude only.
Since it had better performance than the Fw 190A-8, the D-9 was used as top cover for the A-8 bomber destroyers. That's probably how it got its "high-altitude" reputation.
As the D-9 was used as covering fighter, it was not used as bomber destroyer. Note that it was never (as far as I know) used with the extra wing-gun Rüstsätze that actually could have been fitted to the D-9 just as well as to the A-8.
Such extra wing guns only appear with the D-11/12/13 variants which feature the true high-altitude versions of the Jumo 213 engine. These fighters had enough power at altitude so that they didn't need to worry about the extra weight.
Of course, they were stopgaps, too, as Kurt Tank would have preferred to get the more advanced Ta 152, employing the same engines, into production. I believe the main reason this didn't work out were mass production concerns.
Regards,
Henning (HoHun)