Tomcat read German speed test for serial 109 E series not manual or prototype.
Most German speed test for serial 109 E claimed 467 km/h (E-3) - 475 km/h (E1) at sea level with 5- mintues emergency power ( 1.3 Ata). Such performacne is confirmed and corensponed very close to speed test made by other countries like Swiss ( E-3 with 601Aa), French or USA.
German test for serial 109 E-1 - 475-476 km/h at 0
German test for serial 109 E-3 - 467 km/h at 0
USA test for serial 109 E-3 - 467 km/h at 0
French test for serial E-3 ( radiator closed) - 480 km/h at 0
Swiss test for serial E-3 with Db601Aa - 467 km/h
Another German manual data for 109 E
There are only 2 different speed results :
- 1 is made for prototype V15a which clearly for me had not hydraulic supercharger but rather 2-stage - still it is for prototype 109E not serial production ones.
- 2 is manual for 109 but there is any information about these data
I belive that 109 E speed at sea level was between 467-475 km/h at 1.3/1.35 Ata (radiator 1/4 open) and faster speed could be possible to achived at 1-minutes take off power 1.4/1.45 Ata but truly speaking it is only for very short time. I dont belive any serial 109 E could do more then 490-500 km/h at sea level and even such speed probably could be achived with extremaly condition.