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Originally Posted by Kwiatek
Tomcat read German speed test for serial 109 E series not manual or prototype.
Most German speed test ...
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... you show are not performance tests at all. Two tests shown were aimed at showing the difference between guns installed/unistalled, slats sealed/unsealed.
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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).
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Compared to E-1 running at 1.35ata.... is it really a surprise that planes flying at lower power settings are SLOWER?
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Such performacne is confirmed and corensponed very close to speed test made by other countries like Swiss ( E-3 with 601Aa), French or USA.
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The French got around 480 with a less powerful engine. The Swiss conditions are unknown completely. The US did not test low altitude performance at all.
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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.
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Stop making up and spreading this BS again and again about the allaged lack of hydraulic supercharger... its getting tiresome.
The V15a was in every way akin to the 'serial production' 109E types. It was in every way identical to serial production machines, as clearly stated by the report itself.
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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.
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At that is based on a Swiss graph of which's test conditions we know absolutely nothing, the idea that two uncorrected tests at 1.3ata were representative of 1.35ata performance etc.
It still begs an answer for the question why on earth did Messerschmitt contract for the delivery of 4000 planes at 65 000 Reichmarks each doing 500 km/h and not 460 on the deck.
I guess he was desperate for a 260 million RM deficit for violating the delivery contract's terms...