Quote:
Originally Posted by Kurfürst
Seems there's then good agreement between the German tests with the E-1 at 1.31ata and the French tests with the E-3 at 1.3 ata then even according to Harri's own estimates.
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There is no such german tests of the production E-1. Only one test of the prototype V15a at supposed series condition and calculated projected output well before the E-1 was fully developed or out of production line.
Besides the agreement is much better with Holtzauge's calculation, the difference being less than 1,5%.
Quote:
Originally Posted by Kurfürst
Good point. Since the two brief trials of 467-475 kph you mentioned fell well out of the official and other measured tests, and they note that some necessary corrections were not made (the first trial mentioning that the SL speeds were simply graphically extrapolated to SL, and both trials noting the figures are not yet corrected to guaranteed engine output) it's likely the scatter is caused by measurment errors.
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There is no official tests of production planes to fell of, I quess you are refering the tests of the prototype V15a again. The power output is actually not relevant because these were real production planes performing as delivered, no need to assume some kind of projected power.
All the tested production planes (Wnr. 1792, 1791, J347, 1304) had speeds within range of 18kmh and variation is less than 2%.
And please, don't reply with something on the prototype V15a again, it's a dead horse like the 100 octane discussion. If you have real tests on real production planes, then we have something to discuss.
Quote:
Originally Posted by Kurfürst
Which can be entirely ruled out given the fact that the low altitude measurements with the V15a were done on a four way record track, the aircraft having flown in four directions, and the (known) distance covered was timed. This method is by far the most accurate and eliminate all possible instrument errors.
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There is allways chance of error regardless type of the test; error in timing, error on writing results, errors in calculation etc. If there is an error, it's likely in the outlier.
09-30-2012, 11:49 AM
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