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| | Reason: | The mounting of 2 MG 131 in the fuselage over the engine necessitates the attachment of double bumps (see Abb.), due to space considerations, as the standard production cowling of the Me 109 G with DB 605. For reduction of the additional drag caused by these bumps, an enlarged, smoothly faired engine cowling was made.
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| | | Flight tests were made to determine the influence of 3 different cowling styles on the level speed of the Me 109 G.
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| Test
Procedure: | Test flights using combat power were conducted with each of the cowling designs; the speeds obtained were converted to sea level and normal temperature.
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| | Results: | 1. | Standard production 109 G – engine cowling: Vno = 306 mph (492 km/h)
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| | | 2. | Standard production 109 G – engine cowling with double
bumps for MG 131: Vno = 300 mph (483 km/h)
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| | | 3. | Enlarged, faired engine cowling Vno = 304 mph (489 km/h)
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| | Aircraft: | 109 G – 6 Trop. Werk.Nr. 16476 SL + EM
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| | Propeller: | 3-fl VDM – 9-12087a Verstellschraube Werk Nr. 312.8306
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| | Weight: | Ready for take-off ~ 6834 lbs (3100 kg)
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| Condition
of Aircraft: | Production 109 G with tropical equipment (sand filter at the intake), single-wire antenna, under-wing armament, outside air thermometer on the left wing, radiator flap indicator, main-wheel covers with indicator, non retractable tail wheel, normal camouflage finish, 2 ETC 50 under the fuselage arranged one behind the other.
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| Date of
Test flights: | 20.4 u. 22.4.43
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| | Pilot: | Schmid, Lukas
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| Completion
of the Test: | Test flight with combat power n=2600 U/min; p=1,3 ata radiator flaps completely closed. No weapons were installed in the fuselage during the test fights
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