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Originally Posted by Kwiatek
Yea you start again with prototypes and folder data not for serial planes.
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*Yawn* The above are the corrected results for an E-series standard aircraft, and the official type specification of the 109E guaranteed within +/- 5% by the manufacturer.
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Serial 109 E test proff different results - 467- 475 km/h at 1.3 Ata (990 PS). Nothing new to me and not sense to disccussion these.
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Yes with engine outputs uncorrected and in all likelyhood using the higher supercharger gear. They are not even performance tests anyway, but mere comparisons of different installations compared to the standard installation.
There's a reason these trials are never ever considered by Messerschmitt AG as the type's representative perfomance.
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109 T-2 with Db601N in May 1941 reached at 1.35 Ata 2600 RPM - 1175 PS ( maximum emergency power) 490 km/h at the deck.
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Indeed, the 109T in comparison the 109E had a tailhook and enlarged wing area though.
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So i think for 109 E-3/4 at 1.4-1.45 Ata ( 1- minut emergency power) it is possible 490-500 km/h at the deck for a while nothing more.
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Messerschmitt AG thinks otherwise. They think 500 km/h is possible for the 109E series with 1.35ata for 5 minutes, and that the coolant and oil temperatures should be well within limits with the radiator flaps 1/4 open.
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For comparsion serial Spitfire MK1 at +12 lbs could do 505 km/h at the deck but for longer time ( 5- minutes).
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I'd like to see that test of that supposedly 'serial production' Spitfire I doing 505 km/h deck.
Truth is, that the 109E could do 500 km/h on the deck at its five minute rating (and practically indefiniately as the coolant system could cope with it easily), the Spitfire could do about 500 km/h at its five minute emergency rating, though it needed 100 octane fuel to compete and engine wear was hihgh. I am not sure if it's coolant system could take it for long, since it was originally designed for 30% less power/temperature load. The 109E could push things a bit further at tree top using the 1-minute rating, though this was officially not sanction but only for take off.