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2015-04-08

18:47












 

NOTES

 

 

 

 

MESSERSCHMITT  109

 

Bf109E3 Emil   -   Bf109T3 Träger (Tony)  -   Bf109G6 Gustav

 

Avia S199 Messer  -   HA1112M Buchon

 

The story which didn't happen ... outside Atlantic Air Combat

 

  See also : Additional Notes
 Bf109 Variants Summary
 Engines DB600 Series
 Bf109E3 - Data Table
 Bf109G1 - Data Table
Land Based Variants
 Data Bf109E3 Emil
 Data Bf109G6 Gustav
 Data HA1112M Buchon
Carrier Based Variant
 Data Bf109T3 Träger

Not for publication [V1P]
- Added Notes 1
- Added Notes 2
- Added Notes 3
Illustrations
 =
 =
 =
 
     
     

INTRODUCTION
If after the second world war most military aircrafts used by "secondary" air forces came from the victors of this infamous war, some german designs did have a post war carrier, and among them the Messerschmitt 109.   Designed in the 1930s, this famous fighters not only continued to have an operational life with historical users (Switzerland, Finland), but was even re-manufactured after the war.  First in Czechoslovakia where Avia produced above 500 Jumo 211F powered Bf109G6 as the Avia S-199, and in Spain where Hispano reopened a production lined as late as the mid fifties.  Actually, it is this late Spanish production which justifiies the inclusion of the type in in AAC.  Naturally, by the mid sixties, the carreer of the Buchon was almost over, and the lengthening of use of the Me109 derivatives by other operators is a fantasy aiming at satisfying WW2 era aircrafts amateurs.   And we mean aircraft lovers, no more.  The Bf109 is famous, the war in which it was used was not and those who triggered it even less...

In the summary below, the number of airframes might be slightly incorrect.  For instance, Hispano in Spain produced a single two seat airframe in 1951 (HA1110K1L) and another one in 1954 (HA1112M4L), not mentioned here.  Any suggested corrections welcome, but the purpose of this little survey must be read in the context of AAC (ie: to identify operators and main Bf109 post war variants).
  
Yugoslavia (1939 - 195+)

61 Bf109E3 - - 1939 1st  batch to the Royal Yusgoslav Air Force, probably didn't survive the war
59 Bf109G6 - - 1947 195+ 2nd batch to the Yugoslav Air Force, mixed variants, principally G6
    
Switzerland (1939 - 1949)
10 Bf109D1 J-301 J-310 1939 1st batch, purchased and delivered in 1939
30 Bf109E1 J-311 J-340 1939 2nd batch
50 Bf109E3 J-341 J-390 1940 1949 3rd batch, and the aircraft type operated till the end of the 1940s
13 Bf109G6 J-701 J-713 1944 1947 acquired toward the end of the war, and operated for a couple of years only
8 Bf109E3 J-392 J-399 1945 1949 assembled from spare parts after the war
      
Spain (1947 - 1965)
25 HA1109J1L - - 1947 HS12Z89 powered Bf109G2 manufactured under licence after the war
" HA1109K1L - - 1951 HS12Z17 engine change (same 25 airframes)
40 HA1112K1L 1952 HS12Z17 powered Bf109G2 new airframes
172 HA1112M1L 1956 1965 Merlin.45 powered Bf109G2 new airframes produced in 1956-1957
     
Czechoslovakia (1946 - 1957)
21 S99 - - 1946 1957 DB605 powered Bf109G6 remanufactured after the war by Avia
23 C399 - - 1946 1957 DB605 powered Bf109G12 remanufactured after the war by Avia
559 S199 - - 1947 1957 Ju211F powered Bf109G6 remanufactured after the war by Avia
   
Finland (1943 - 1954)
30 Bf109G2 MT-201 MT-230  1943 1st batch, purchased and delivered in 1943-1944
19 Bf109G2 MT-231 MT-248 1944 2nd batch
3 Bf109G8 MT-481 MT-483 1944 reconnaissance aircrafts
109 Bf109G6 MT-401 MT-480 1944 1954 Three were high altitude Bf109G6/AS; the G6 was used operationally till 1954
MT-484 MT-514 1944 473, 474, 514 destroyed before arrival
25 Bf109T2 MT-515 MT-539 1944 fictional transfer of a squadron worth of airframes when the type was retired
     
To these "historical" airframes, whose operational life will thus be artificially extended into the 1960s, a batch of  Bf109T will be added to the Finnish Air Force, allowing these to operate from the Swedish aircraft carriers.   Historically, these de-navalized aircrafts were stationed in Norway at the start of the war, then on Heligoland.  So let's imagine that instead of all being phased out/shot down/scrapped, some were transferred to Finland along with with the Bf109G6, and secretely re-engined/re-navalized in the late 1950s as Bf109T3 to offer Finnish Air Force pilots with a maritime experience...   Just a little fantasy making both the Irish Air Corp Seafire and the Finnish Air Force Bf109T Träger operating along side from the same deck.   Hopefully, the purists shall forgive.
     
Bf109 Variants in Atlantic Air Combat
   
Bf109E3
While the Swiss Air Force also shortly operated a few Bf109G6, the E3 was their main variant; let's keep it that way.  Like all AAC Bf109, it's beefed up with a ventral pylon, wing pylons (perhaps !), and wing rails for HVAR rockets
-
Bf109G6
Clearly the main variants used post war, and it will also stand for the Avia S199.  Some discrepences were found, especially the amount of ammunitions available for the guns.   The quantities mentioned in Finnish Air Force Pilot's Notes are lower than what is assumed to have been the capacity of the ammunition boxes (shown in the nearby column) but is consistant with observations made on aircrafts shot down (275/300, and 150/200).  But since these Pilot's Notes are post-war, let's assume these "lower" quantities were common practice.  Regarding fuel consumption, a calculated average shall apply.
-
Bf109T3
Thus a cheat as outlined above : for the benefit of "performances", this variant has been re-engined with Volvo manufactured DB605A engines, re-gunned with Swiss weapons, and naturally re-navalized.  Like all AAC Bf109, it has a ventral pylon, and wing rails for HVAR rockets
-
HA1112M
Hispano thus produced two main batches after the war, with the main one being the Merlin powered variant, armed with a pair of wing mounted 20mm Hispano cannons.  The type even fired in anger is some post colonial warfare.   It will thus be the variant retained for AAC purposes.   However, external stores will also be somewhat different from what the Spanish Air Force has been using especially as rockets are concerned (standard set up for all Bf109 variants in AAC)
     
Preliminary Data Table
 
3 13 8 8 8 10 10 10 10 10 10
Aircraft ID     Bf109E3 Bf109T3 Bf109G6 AviaS199 HA1112K HA1112M
Aircraft Name     Emil Trager Gustav - Buchon Buchon











Length

metre 8.64 8.64 8.95 8.95 8.490 8.490

Span

metre 9.87 11.08 9.92 9.92 9.92 9.92

Engine-1 ID

piston DB601A DB605A DB605A Ju211F HS12Z17 Merlin.45

Engine-1 Pwr

max 1100.hp 1475.hp 1475.hp 1322.hp 1300.Hp 1610.hp

Engine-1 Pwr

extra - - - - - -

Propeller/Ø

metre 3/3.000 3/3.000 3/3.000 3/3.000 3/3.000 4/3.100

SFC: Pwr Stnd

lb/hp/hr 0.474 0.532 0.532 0.540 0.480 0.320

SFC: Pwr Xtra

lb/hp/hr n/a n/a n/a n/a n/a n/a











Speed rotation

knots 78.kn 61.kn 78.kn 78.kn

Speed TO:F15

knots 90.kn 70.kn 90.kn 90.kn

Speed max

knots 298.kn 307.kn 350.kn 364.kn

Speed cruise

knots 193.kn 256.kn 227.kn 216.kn

Speed stall:F00

knots 65.kn 51.kn 65.kn 65.kn

Speed stall:F15

knots 60.kn 47.kn 60.kn 60.kn

Speed stall:F35

knots 55.kn 43.kn 55.kn 55.kn

Speed approach

knots 105.kn 85.kn 105.kn 105.kn

Speed landing

knots 86.kn 67.kn 86.kn 86.kn

Climb

feet/min 2800.ft/m 3000.ft/m 3280.ft/m 5577.ft/m

Ceiling

feet 34650.ft 34450.ft 36000.ft 33500.ft

Take off run MTOW

metre 400.m 250.m 400.m 400.m

Landing run brake

metre 600.m 250.m 600.m 600.m

Landing run reverse

metre - - - -

Range indicative

naut.mile 356.nm 378.nm 391.nmi 413.nmi

Guns

Position

Ammo

 





2× MG29/750

Cowl 7.62x51   2×480.rpg 2×480.rpg - - - -

2× M131/13

Cowl 13.4x84   - - 2×250.rpg 2×300.rpg - -

1× M151/20

Hub 20x82   - - 1×130.rpg 1×200.rpg - -

2× OeFF/20

Wings 20x72   2×60.rpg 2×60.rpg - - - -

2× BRED/127

Wings 12.7x81   - - - - ? 2×180.rpg -

2× M151/20

Gondola 20x82   - - 2×80.rpg 2×135.rpg - -

2× HST5/20

Gondola 20x110   - - - - - ? 2×125.rpg











Weight Empty

Historic     4189.lb 4758.lb 6167.lb     5.878.lb

Weight Combat

Historic         7709.lb      

Weight MTOW

Historic     5875.lb 6167.lb 8370.lb     7341.lb











Weight

Empty - - 4189.lb 4758.lb 6671.lb 5878.lb

Weight

Crew - - 200.lb 200.lb 200.lb 200.lb

Ammo×2:Cowl

480rpg 7.62x51 34g 72.lb 72.lb    

Ammo×2:Cowl

250rpg 13.4x84 75g     83.lb  

Ammo×1:Hub

130rpg 20x82 183g     53.lb  

Ammo×2:Wing

60rpg 20x72 200g 53.lb 53.lb    

Ammo×2:Wing

180rpg 12.7x81 84g        

Ammo×2:Wing

125rpg 20x110 260g       143.lb

Fuel Internal

400L 88.1gal 7.6lb/gal 670.lb 670.lb    

Fuel Internal

420L 92.5gal 7.6lb/gal     703.lb 703.lb

Weight

Combat 5184.lb 5753.lb 7710.lb 6924.lb

Weight MTOW

Historic - - 5875.lb 6303.lb 8370.lb     7404.lb











External Load Allowance 691.lb 414.lb 660.lb 417.lb

EXTERNAL

LOADS

IN AAC





Gun Gondolas 183lb/@ Empty - - 366.lb -

Ammo×2:Gond

80gpg 20x82 183g - - 64.lb -
AND AND OR AND
Ventral Pylon 1×250.kg Bomb 550.lb 550.lb 550.lb 550.lb 550.lb
OR OR OR OR OR
Ventral Pylon 1×300L Fuel 550.lb 550.lb 550.lb 550.lb 550.lb
OR OR OR OR

HVAR:T10

2×4 62.lb 496.lb 496.lb 496.lb 496.lb

HVAR:RP3

2×3 82.lb 492.lb 492.lb 492.lb 492.lb

HVAR:AR3

2×3 79.lb 474.lb 474.lb 474.lb 474.lb

HVAR:AR5

2×2 141.lb 564.lb 564.lb 564.lb 564.lb

HVAR:R132

2×4 50.lb - 400.lb 400.lb -

HVAR:R135

2×2 143.lb 572.lb 572.lb 572.lb 572.lb
OR OR OR OR OR

Historical

Weapon              

HVAR:WG21

2×1 air-to-air 247.lb - - -    

HVAR:80mm

2x8 air-to-gnd 30.lb - - -     480.lb

AAC Cheat

Weapon -    

HVAR:WG27

2×1 air-to-gnd 245.lb 490.lb 490.lb 490.lb     490.lb











Weight MTOW

- - 5756.lb 6325.lb 8282.lb 7496.lb

Weight MTOW

Historic - - 5875.lb 6303.lb 8370.lb     7404.lb
 
     

Comment on Table 2
-

It seems reasonably clear that Swiss Bf109E were not equipped with a Motorkanone firing through the propeller hub.  An Oerlikon FF is added here for weight comparison purposes only - the Aircraft Data Sheet will show differently

The quantities of ammunitions for the Finnish Bf109G come from a Finnish Air Force aircraft manual; they differ from what the litterature usually mention - it's shown here form comparison purposes, and the empty weight is cheated to match the published "combat weight"

Fuel weight is calculated along AAC standard

Specific fuel consumption varies with sources : according to Wikipedia it's roughly 0.44 but an average calculated on data published in the Finnish Air Force Bf109 manual gives a very different reading - a figure will be adopted in the Data Sheet

Historically, the Bf109G could be equipped with a pair of 21 cm (8 in) Wfr. Gr. 21 rockets (G-6 with BR21) aerial rocket lodged in launching tubes (total weight of the tube+rocket assembly : 247lb) - for AAC purposes, the Bf109 could be equipped with a pair of air-to-ground heavy rockets of similar weight but launched from wing pylons

The exact type of Oerlikon 80mm rocket used by the Spanish Air Force is unknown - can't be the SNORA as this one only appeared in the 1960s (and Spanish equipment dates from the 1950s) - weight shown is an educated guess only

The gondola guns of the Bf109G are known to add a total weight (with ammo) of 215 kg to the aircraft

The last line of the table compares AAC calculated MTOW (in bold red) with known values - discrepencies are minimal, notwithstanding the fantasy use of HVAR rockets, which was the purpose of the excercise.

The Bf109T are thus here re-gunned with Swiss weapons

     

EXTERNAL WEAPONS USED IN AAC
In brief, external weapons used on the Bf109 could be described as follows (not necessarily on all real life variants) :

Historical Atlantic Air Combat
fuselage pylon : alternative loads fuselage pylon : alternative loads
1×250kg bomb 1×250kg  bomb or 1×500lb  or 1×550lb  or 1×250lb
4×  50kg bomb 4×  50kg  bomb or 4×100lb  or 4×110lb
1×300lit. fuel 1×  66gal fuel
underwing stores - ± central position underwing pylon - ± central position : alternative stores
2×112kg air-to-air rocket (WGr21) launcher 2×250lb WG27 air-to-surface rocket (cheat)
2×HVAR air-to-surface rocket
2×250lb missile air-to-surface, IR guided
2×250lb missile air-to-air, IR guided
underwing stores - outer panel underwing stores - outer panel
n/a 2×HVAR air-to-surface rocket
    
- the ventral pylon is maintained in its role and weight carrying value (but applying to any bomb type : napalm, FAE, ...)
- the position of the WGr21 launcher is made into a conventional pylon able to launch about everything within the same weight value
- the outer wing panel will support HVAR laucher rails
     

___________