[Vasya]

http://www.wwiiaircraftperformance.o...190d9test.html


http://www.wwiiaircraftperformance.o...002_FB_Nr3.pdf

So we can state: D-9 without engine sealing - 15 km/h; with ETC 504 + fixed wheel covering about -10 km/h. This indicates that the D-9 reached the following speeds - minimum:

606 km/h (377 mph) at sea level with MW 50 injection and engine sealing; without ETC 504 and variable wheel covering.
591 km/h (367 mph) at sea level with MW 50 injection; without engine sealing, ETC 504 and variable wheel covering.
581 km/h (361 mph) at sea level with MW 50 injection, ETC 504 and fixed wheel covering; without engine sealing.

With 1900 PS engine set up:

578 km/h (359 mph) at sea level without engine sealing and variable wheel covering.
568 km/h (353 mph) at sea level with ETC 504 and fixed wheel covering.