| 1. | After replacement of the engine that failed from supercharger damage, serial No. 328909, level speeds using combat and take-off power were flown in the as-delivered condition.
With consideration of Flight Report Nr 1 represented ram pressure measurements the salient points of the speed plots produced the following values:
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| Speed at SL with combat power VwKL = 321 mph (516 km/h)
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| " " " take-off power VwK? = 334 mph (537 km/h)
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| Speed at full throttle height with combat power (5650m) VwKC = 366 mph (589 km/h)
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| " " " " take-off power (6100m) VwKC = 383 mph (617 km/h)
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| The necessary conditions are fulfilled for a later comparison and the airplane can be converted to the intended improved aerodynamic condition.
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| 2. | Since a modification of the cowl flaps as well as the cooling air outlet cross-section is also scheduled with the conversion, the pressures in the engine were determined during climb and level flights.
From the application of the climb values it follows that from 6000 m height 220° cylinder temperatures are reached by BMW, the necessary cooling pressure drop reached only with fully opened cowl flaps.
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| 3. | For the check of the rear position of the center of gravity for bad weather fighters the machine was brought, through ballast, to a rear center of gravity with full drop tank from s = 0.78 ./. 0.76 m . With this the airplane is significantly unstable and must be flown carefully.
Only after consumption of the fuel supply up to approximately 100 litres for each main fuselage tank, thus a S-position of 0.72 m, is determined to give sufficient stability around the transverse axis.
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| In the case of standard pre-setting of the horizontal stabilizer of 2° toward top-heavy (indicated 0) and not vorgebügelter elevator trim angle resulted in the following trim indicator positions:
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