Thanks Kurfurst, I’d not seen the V15 trials information before, the test-report is quite nice. Although I’d much rather have all of the pgaes in their originals, not just a few, and not have to rely on transcribed text into your html page.
The above aside, can you help me with a couple of questions:
1) What can we take from the apparent inability of any subsequent tests of the E1s or E3s (that I can find at least) to get anywhere near the “sea-level” (see question 4 below) speed of 493kmh or 498kmh? How do we explain that the prototype was able to record speeds that no subsequent 109 testing seems to have been able to achieve? I see testing data of 109E3 Nr1972, and 109E1s Nr1774 and Nr1791 (all of which are German tests, not British tests), none of which achieve above 485kmh at their lowest altitude of “0” (average is around 470)
2) Can you provide Blatt 3 of the testing documentation, the full-pressure altitude (Volldruckhohen) results – which I cannot find on your page?
3) Your tabulated summary of Blatt 5 indicates that the achieved speed (with the supposedly suboptimal engine pressures) was 493kpm at 0 altitude relative to the ground. Why does Blatt 6 indicate however that only 485 was obtained? is that because Blatt6 projects the speed down to sea level, whereas the tests were carried out at 0 altitude above ground, at a location (Augsburg?) already elevated (~440m) above MSL? If so, according to the test graph, do we get a sea-level speed of 485(490), not 493(49
for the V15?
4) the tests often make corrections for air pressure of a standard (Augsburg?) day "normaltag". Do we know what that pressure was?