|Engine BMW 801 D-2/305060
||2 MG 131
||2 MG 151 without ammunition
|Actuated inner wheel doors
|Additional latch between the barrels of the MG 131 in the panel in front of the windshield
|1. Ram pressure calibration over test course.
2. Level speeds with combat power.
3. Evaluation of the outboard pitot tube
The combat power level speeds, plotted under consideration of the ram
pressure calibration, can be taken from the attached chart. As the
comparison with the values documented in the flight report Fw 190/816
No. shows, the speed loss as compared to the A-5 fighter was reduced
from 15 to 7-10 km/h by the improved latching of the modified panel in
front of the windshield for MG 131. This speed loss is caused by the
already mentioned panel and the two extra MG 151 barrels.
pitot tube, with the up to now usual tube length, installed at the wing
tip according to BSK 190.74990, causes strongly fluctuating speed
readings in bumpy weather and with a rough engine, due to strong
vibration in the long tube. The position error is, as shown on the
chart, within normal boundaries. Further tests with a shortened pitot
tube are currently under way.