Me 109 G Flight Tests

Me 109 G Flight Testing

Messerschmitt AG. Augsburg	Full Throttle Height Me 109 G with DB 605 A	Test Report Nr. 109 09 L 42 Date 16.6.42 Copy 3
Dept. Flight Testing Group Performance


Results:	1.)	Full throttle height in high speed with combat power corrected to normal temperature.

Intake 150 Ø	20,997 ft. (6400 m))	Desired value
Intake 155 Ø	20,997 ft. (6400 m))	n Intake = 0,9
Early intake	20,505 ft. (6250 m))	22,966 ft. (7000 m)

	2.)	The total pressure at the intake entrance, ~ 50 kg/m² higher than in the free flow, is due to prop wash.

	3.)	The air temperature in the intake lies 2° above the ambient temperature. The heating thus lies within the measuring accuracy.

	4.)	The supercharger air temperature at 8 km is 92°, the desired value is 107°. (after engine manual with consideration of the ambient temperature, lay 7° over CINA, and Stauauf heating.) Currently, the known possible airframe-related reasons for the bad FTH have been examined and found to be in order, consisting of: 1.) Heating from exhaust gases, 2.) too narrow plenum chamber, 3.) insufficient ram in front of the intake. Apparently, however, the supercharger air temperature, ~15° too low, can be attributed to the poor static head of the supercharger.

Augsburg, den 16.6.42
FEV/EK/Go.

For the full report see:
Full Throttle Height Me 109 G with DB 605 A
Volldruckhöhe Me 109 G mit DB 605 A

Messerschmitt AG. Augsburg	Speed Measurements on Airplanes With Specially Treated and Standard Production Surfaces	Test Report Nr. 109 11 L 42 Date 9.7.42 Copy 3
Dept. Flight Testing Group: Performance


Results:	Flight	V_w	V_n	V_nk	Remarks
	2	323 (520)	321 (517)	323 (520)	Paint easily cracked
	3	322 (518)	327 (526)	329 (529)	Böig
	4	319 (514)	326 (525)	328 (528)
	5	321 (517)	327 (526)	329 (529)	Wiederholung v.3
	6	323 (520)	326 (525)	328 (528)

	7	319 (514)	320 (515)	322 (518)
	8	323 (520)	322 (519)	322 (519)
	9	321 (517)	323 (520)	323 (520)
	10	321 (517)	320 (515)	322 (518)

	(Speeds given in MPH, values in parenthesis in km/h)

V_w represents the true speed on the test day at test altitude with actual engine power, while V_n represents the speed on a Normal Day at 820 ft altitude with 1,30 kg/cm² boost and 1.80 kg/cm² blower pressure. With V_nk a speed loss of 2 mph (3 km/h), caused by the radiator indicators, is taken into account.

For average comparison values, 327 mph (527 km/h) at 820 ft altitude and 323 mph (520 km/h) at Sea Level is obtained with specially treated machines. The corresponding values of the standard production machines are 322 (519) and 318 mph (512 km/h). The speed increase thus averages 5 mph (8 km/h).

Sea level speeds after corrections:

	W.Nr.	V mph SL	V km/h 0m
	13438	319	513
	13439	313	504
	13440	318	512
	13442	318	512
	13448	317	510
	13496	319	514
	13506	320	515
	13500	317	510

For the full report see:

Speed Measurements on Airplanes With Specially Treated and Standard Production Surfaces

Geschwindigkeitsmessungen an Flugzeuge mit sonderbehandelten und serienmässigen Oberflächen

Messerschmitt AG. Augsburg	Performance Measurment Me 109 G with DB 605 A and DB 601 E.	Test Report Nr. 109 19 L 42 Date 19.9.42 Copy 3
Dept. Flight Testing Group Performance


Results:	Speed with DB 601 E at sea level	V_o = 319 mph
	Speed with DB 605 A at sea level	V_o = 315 mph
	Speed with DB 601 E at FTH = 19,685 ft.	v = 386 mph
	Speed with DB 605 A at FTH = 20,013 ft.	v = 389 mph
	Service ceiling at 98 ft/min with DB 601 E	H = 40,354 ft.
	Service ceiling at 98 ft/min with DB 605 A	H = 41,339 ft.

	The values stated above are measured at Climb and Combat power and are converted to normal day and correct setting of the supercharger regulator.

	The influence of the radiator flap position on temperature and speed can be seen on page 9. The coolant temperatures of both measured engines are similar, i.e. any large heat removal of the DB 605 is balanced by higher air and water speed.

Climb Performance with DB 605 A

Speed Performance with DB 605 A

For the full report see:

Performance Measurments of the Me 109 G with DB 605 A and DB 601 E Engines or
Leistungsmessung 109 G mit DB 605 A und DB 601 E

Messerschmitt AG. Augsburg	Speed difference between V and standard tail unit on ME 109 G	Test Report Nr. 109 04 L 43 Date 22.3.43 Copy
Dept. Flight Testing Group Performance

Results

The test flights resulted in the values listed below in the following table:

Version	Nr.	V_w mph (km/h)	Δ V km/h
V Tail Unit	1	321 (516)	-0-
V Tail Unit	2	320 (515)	-0-
Standard Tail Unit	3	318 (512)	- 2.5
Standard Tail Unit	4	319 (514)	- 2.5

	H = 620, B = 706 m Hg, t = + 2°
	r = 1,191 kg/m³, n = 2600 rpm, p = 1.30 ata.

	All flights are converted to the values of the first flight. They are comparable only among themselves, may not thus be consulted for calculations.

Sea level speed = 314 mph (504 km/h) after corrections.

For the full report see:
Speed difference between V and standard tail unit on ME 109 G
Geschwindigkeitsunterschied zwischen V- und Normalleitwerk an Me 109 G

Messerschmitt AG. Augsburg	Influence of the engine cowling shape on the speed of the ME 109 G	Test Report Nr. 109 06 L 43 Date 22.4.43 Copy
Dept. Flight Testing Group Performance


Results:	1.	Standard production 109 G – engine cowling: V_no = 306 mph (492 km/h)

	2.	Standard production 109 G – engine cowling with double bumps for MG 131: V_no = 300 mph (483 km/h)

	3.	Enlarged, faired engine cowling V_no = 304 mph (489 km/h)

Sea level speed = 309 mph (498 km/h) after corrections.

For the full report see:

Influence of the engine cowling shape on the speed of the ME 109 G

Einfluss der Form der Motorhaube auf die Geschwindigkeit der Me 109 G

Messerschmitt AG. Augsburg	Performance measurement ME 109 G-6 Tropical with DB 605 A; Influence of various attachments.	Test-Report Nr. 109 10 L 43 Date 16.6.43 Copy
Dept. Flight testing Group Performance


Results:	1.	Influence of the attachments.
		Level speed is reduced through:
		2 x underwing weapons	about	7 mph
		2 x ETC 50 racks	about	0 – 2 mph
		2 x 50 kg Bomb	about	4 mph
		1 Sandfilter		6 – 7 mph
		and increases through wheel covers about 6 to 7 mph.
		Details see page 4.

2.	Climb performance on page 6; from it:
	Ceiling :	36,516 ft.
	With take-off weight:	7,187 lbs.

3.	Level speed with combat power (fully equipped.):
	Flight height	0 ft.:	Vn_o = 304 to 306 mph
	Full throttle height	21,063 ft.:	Vn = 379 mph
	Full throttle height 21,654 ft. without Sandfilter in fastest condition (without wing weapons, Sandfilter, with wheel covers) is V_no = 318 mph.

4.	Results of the take-off and landing measurments, see Page 5; from it:
		S_R	S₂₀	weight
	Take-off	1,407 ft.	2,247 ft.	7,297 lbs.
	Landing	1,654 ft.	3,750 ft.	7,297 lbs.
	The indicated distances are average values from 7 take-off and landing measurements. They are not converted to zero wind.

Climb Performance (with Sandfilter)

Level Speed

For the full report see:

Performance measurement ME 109 G-6 Tropical with DB 605 A; Influence of various attachments. or
Leistungsmessung Me 109 G-6 Tropen mit DB 605 A; Einfluß verschiedener Anbauten.

Messerschmitt AG. Augsburg	Speed influence of 2 MK 108 under the wings of the ME 109 G.	Test Report Nr. 109 14 L 43 Date 12.8.43 Copy
Dept. Flight Testing Group: Performance


Results:	Speed without mockup	V_w = 326 mph (525 km/h)

	Speed with mockup	V_w = 322 mpg (519 km/h)

	Speed loss due to mockups	ΔV = 4 mph (6 km/h)

	n = 2600 U/min; p – 1,30 ata; B = 717 mm Hg;
	t = 19°C; H = 480 m.

Sea level speed = 316 mph (509 km/h) after corrections.

For the full report see:

Speed influence of 2 MK 108 under the wings of the ME 109 G.
Geschwindigkeitseinfluß von 2 MK 108 unter den Flächen der Me 109 G.

Messerschmitt AG. Augsburg	Drag of 160 liter external tank, without fairing, beneath the fuselage.	Test Report Nr. 109 15 L 43 Date 15.8.43 Copy 3
Dept. Flight Testing Group:Performance


Results:	The following values are not converted, since air conditions did not change during the test.

Condition	V mph	V/mph
Smooth machine	327	0
Mounting bracket without tank	324	- 3
Mounting Bracket with 160 l-Tank	308	-19

	B = 729 mm Hg, t = + 14 °, y = 1,179 kg/m³,
	p₄= 1,30 ata, p₂ = 1,72 ata.

	Tests with an un-faired 300 liter external tank on a Me 109 E/3 (vgl Test Report from 30.7.40) resulted, after conversion to an Me 109 G, in a speed loss of 31 km/h. This calculation is still confirmed by a test. A decrease in size of the tank thus brought no speed gain. A fairing is in the works. A significant improvement is anticipated from this measure.

Sea level speed = 314 mph (506 km/h ) after corrections.

For the full report see:

Drag of 160 liter external tank, without fairing, beneath the fuselage.

Widerstand des unverkleideten 160 l Außenbehälters unter dem Rumpf.

Messerschmitt AG. Augsburg	Performance Summary Me 109 G	Date 14.1.44 Copy
Dept. Flight Testing Group Performance

Description of the basic model Me 109 G 1.

Building specification:

Airframe:	Pressurized cockpit, strengthened wing (cross-beam, ribs, skin) roller-stored slats, lines for GM 1 installation in the wing and as well as fittings for long range and weapons release installations and under wing weapons; automatic water and oil coolers, oil reservoir enlarged 36 l. Rear armor and head protection, radiator armor and Leichtmetallpnzerung.

Chassis:	Tail wheel not retractable. Bumps at top surface to accomodate landing gear. Without wheel covers.

Power plant:	Engine: DB 605
	Propeller: 3 flg. VDM adjustable propeller
	Fuel tank: 400 l SG
	Oil tank: 36 l
	Oil cooler: Bauchkühler
	Radiator: 2 in wings,

Equipment:	Fuselage armament	2 MG 17
	Fuselage armament (In engine)	1 MG 151
	Surface (Fläche) armament:	without

Surface:	Standard camouflage paint. No special treatment.

Weight:	6,724 lbs.

Photographs:	Deviations from the G 1 model: air vents have been thickened and turned horizontal. The standard cockpit shown conforms to the aerodynamic form of the pressurized cabin. 4 vents for spark plug ventilation are missing. Edge caps were enlarged.

Performance:

	V_n	w
	mph	ft/min
at 0 ft.	314	3,427
at FTH	21,654 ft. 391	18,701 ft. 2,644
Ceiling	38,386 ft

Climb rate of the basic model Me 109 G

Speed of the basic model Me 109 G 1

See also:

Leistungszusammenstellung Me 109 G

The full report is 38 pages. In order to calculate the performance of each modified version of the series, a detailed description and performance data of basic model are given. All modifications of armament, armor-plating and equipment are listed in detail, and instructions for the calculations are included. Tables and graphs show the influence of weight and of drag of exterior modifications on the performance of the Me 109 G. The data shown above is the report's summary of the 109 G-1 basic model (page 3).

Messerschmitt AG. Augsburg	Performance of the Me 109 G with DB 605 AS.	Test Report Nr. 109 20 L43 Date 22.1.44 Copy 4
Dept. Flight Testing Group Performance


Result:	For comparison the corresponding performance of the Me 109 G in the same condition is shown in parentheses.

	1.) Speed at sea level
	315 mph (314)
	2.) Speed at FTH
	406 mph (391)
	3.) Full throttle height
	27,231 ft. (21,654)
	4.) Climb rate at FTH
	2,350 ft/min (2,546)
	5.) Climb full throttle height
	23,950 (18,700)
	6.) Climb ceiling
	39,698 ft. (37,730)

	Performance is converted to standard temperature. Combat power without GM 1

Performance Curves

For the full report see:

Performance of the Me 109 G with DB 605 AS or
Leistungen Me 109 G mit DB 605 AS

Rechlin E'stelle
Test Nr. 1586
E.B.Nr......./43
G.Kdos.

Aircraft Model Bf 109 G-1
with DB 605 A engine

Kennblatt

Page 7

12.) Flight Performance:

Alt. ^HCINA ft. (km)	High Speed		Climb Speed V_a mph (km/h)	Time to Climb min.	Climb Rate ft/min (m/sec)
Alt. ^HCINA ft. (km)	TAS mph (km/h)	IAS mph (km/h)	Climb Speed V_a mph (km/h)	Time to Climb min.	Climb Rate ft/min (m/sec)
0	326 (525)	326 (525)	174 (280)	-	4,113 (21)
3,281 (1)	338 (544)	321 (517)	174 (280)	0⁴⁷	4,113 (21)
6,562 (2)	350 (563)	317 (510)	174 (280)	1³⁵	4,113 (21)
9,843 (3)	362 (583)	312 (502)	174 (280)	2²⁴	3,780 (19.8)
13,123 (4)	374 (602)	306 (492)	174 (280)	3¹⁶	3,643 (18.6)
16,404 (5)	386 (622)	300 (482)	174 (280)	4¹¹	3,408 (17.4)
19,685 (6)	399 (642)	292 (470)	174 (280)	5¹⁴	3,094 (15.8)
22,966 (7)	403 (649)	281 (452)	174 (280)	6²³	2,605 (13.3)
26,247 (8)	403 (648)	263 (424)	171 (275)	7⁴⁶	2,135 (10.9)
29,528 (9)	400 (643)	247 (398)	168 (270)	9³⁶	1,625 (8.3)
32,808 (10)	398 (640)	228 (367)	165 (265)	11⁵⁴	1,175 (6.0)
36,089 (11)	378 (609)	206 (332)	162 (260)	15⁴¹	685 (3.5)
39,370 (12)	345 (555)	174 (280)	158 (255)	24⁰²	196 (1.0)

The performance indicated relates to climb and combat power, i.e. n = 2600 rpm; P_Lade = 1.3 ata. Take-off and emergency power for the DB 605/A is still not released at this time.

For speed influence of bomb, drop tank and under-wing guns see range table.

Full throttle height with full throttle level flight	20,997 ft. (6.4 km)
Full throttle height in climb	18,701 ft. (5.7 km)
Take-off distance to 66 ft. (20 m), normal	1,919 ft. (585 m)
Take-off distance to 66 ft. (20 m), with bomb	2,428 ft. (740 m)
Landing distance from 66 ft. (20 m), normal braking	2,526 ft. (770 m)

Flugzeugmuster BF 109 G-1 mit Motor DB 605A

Versuch Nr: 10 18 105 428
VB Fr.M.01 L 43, Leistung Fw 190 (Vergleich Fw 190 - Me 109 G-1)
Mtt Erla Me 109 G
Me 109 G-2 Finnish Curves
M.E. 109 G-2. Summary of Technical Trials carried out in Middle East
Pilot’s Comments on ME 109G, AAF No. EB-102
Tactical Trials - Me.109G-6/U-2
GL/C-E2 Flugzeug-Entwicklungs-Blatt: BF 109 G-5, G-6, G-6/AS
Bf 109 G-6/DB 605A level speed curves with combat and emergency power
Level Speeds with MW50, Me 109 GJ+FX with DB605 A-S

WWII Aircraft Performance