DCS Bf 109K-4

[Hans-Joachim Marseille]

... Anything else?

 

http://de.wikipedia.org/wiki/Messerschmitt_Bf_109#Bf_109_K

 

Weapons:

2x 13mm MG.131 (300 shot each, positioned above engine)

1x 30mm Mk.108 (65 shot, through propeller)

2x pylons for under-wing weapons (2x MG.151/20) or rockets (2x W.Gr. 21 or 42)

1x bomb-pylon ETC.500 (1x 250 kg) or ETC.503 (1x 250 kg or 1x 500 kg)

 

Bewaffnung:

zwei 13-mm-MG MG 131 (je 300 Schuss) über dem Motor und eine 30-mm-MK 108 (65 Schuss), durch die Propellernabe feuernd;

dazu verschiedene Rüstsätze für Unterflügelrohrwaffen (2 × MG 151/20) oder Raketen (2 × WGr 21 oder 42),

ein Bombenträger ETC 500 IXb (1 × 250 kg) oder ein Bombenträger ETC 503 (1 × 250 kg oder 1 × 500 kg)

Edited July 25, 2014 by Hans-Joachim Marseille

[MiloMorai]

http://www.fliegerweb.com/geschichte/flugzeuge/lexikon.php?show=lexikon-586

 

"Die Bf.109 K-4 entsprach bis auf die Verwendung einer Druckkabine völlig der K-2. Sie wurde nur in geringer Stückzahl etwa 80 Stück gebaut.

Ab Februar 1945 erhielten einige Maschinen als Motorkanone die 30 mm Maschinenkanone MK 103 mit 60 Schuss."

 

From February 1945 some planes were outfitted with 60-shot 30mm Mk.103 motor-gun (propeller).

 

There was no K-2s built.

 

A big nope. There was some experimenting with a MK103M but it went nowhere.

 

And, there was no cowl fitted MG151s.

[Hans-Joachim Marseille]

There was no K-2s built.

 

A big nope. There was some experimenting with a MK103M but it went nowhere.

 

And, there was no cowl fitted MG151s.

That's why I already edited my post above ...

The Mk.103 was too big, long and heavy for the Bf.109 (I found the counter after submitting my post).

For MG.151 implementation too many modifications (motor-support, fire-wall, motor-supply) needed to be made, so also unlikely.

Where did you read that no K-2's where built? It says K-2 and K-6 were built in small numbers, however it cannot be established without doubt that they made it into service.

 

http://www.deutscheluftwaffe.de/Flugzeuge/Jeager/Me109K/flugzeug109K.htm

 

Die einzige Version der K-Serie, die in größeren Zahlen zum Einsatz kam, war die K-4. Von der K-2 und der K-6 wurden jeweils nur wenige Exemplare gebaut, doch ist heute nicht mehr zweifelsfrei feststellbar, ob überhaupt noch eine einzige Maschine dieser Varianten je in Dienst gestellt wurde.

 

Über die K-Serie wird oft behauptet, dass 15 mm MG 151 Maschinenkanonen die Stelle der 13 mm MG 131 vor dem Cockpit eingenommen hätten, ebenso, dass eine Variante mit 30 mm MK 103 Motorkanone in Produktion gewesen sei. Diese Vorstellung ist jedoch unhaltbar, da sich die 30 mm MK 103 für ein Flugzeug wie die Bf 109 als zu groß, zu lang und zu schwer erwies. Auch der Einsatz der 15 mm MG 151 als Rumpfwaffen vor dem Cockpit war technisch nicht möglich, da dieses Vorhaben umfangreiche Modifikationen (Motorträger, Brandschott, Motorzusatzaggregate etc.) zur Folge gehabt hätte. Zudem war die 15 mm-Ausführung des MG 151 schon lange zuvor ausgemustert, bzw. auf das Kaliber 20 mm umgerüstet worden.

Edited July 25, 2014 by Hans-Joachim Marseille

[Friedrich-4B]

Accounts differ re the K-2 and K-6; according to Prien & Rodeike no K-2s were built and there was one K-6; JaPo says one of each. The Flugzeug Profile No 5 on the G/K gives the W.Nr. 600056 for the single K-2 prototype, which first appeared at Tarnewitz at the end of September 1944

[Kurfürst]

The Mk.103 was too big, long and heavy for the Bf.109 (I found the counter after submitting my post).

 

The MK 103mot was developed specifically from the 109K to fit into the blast tube. It was to be the main armament for the K-10 variant, which did not have the chance to enter mass production. Only the K-4 was mass produced.

 

K-6 was to have 3 MK 108s (1 nose, 2 in wings), the same DB 605D engine and greatly increased armor protection. One was tested in Tarnewitz. The K-14 was to have the same setup (3 MK 108, extra armor) but was powered by the two stage DB 605L with extreme high altitude output. It was a stand-in, should the Ta 152 project fail.

[Hans-Joachim Marseille]

Bf 109 K-4m W.Nr. 570 xxx "Weisse 6", 9. /JG 4, Germany, Spring 1945, with something under the belly that very much looks like an AB (250?) series bomb container.

 

"Teufelseier" (: Devil's eggs), also called butterfly-bomb (cluster-bomb); http://en.wikipedia.org/wiki/Butterfly_Bomb.

 

 

Copied by the Americans ...

 

Edited July 26, 2014 by Hans-Joachim Marseille

[Grim_Smiles]

Bf 109 K-4m W.Nr. 570 xxx "Weisse 6", 9. /JG 4, Germany, Spring 1945, with something under the belly that very much looks like an AB (250?) series bomb container.

 

 

Mines?

 

 

Definitely looks like the ones that drop butterfly bombs:

 

 

[Hans-Joachim Marseille]

Definitely looks like the ones that drop butterfly bombs

Also found it ... I learn something new here every day :thumbup:

[Isegrim]

Pfffuuufff huh...oh man. Im so glad they didnt use real Butterfly's for those.

[Kurfürst]

Just to clarify, the picture posted is a generic picture of an AB type container bomb. The picture of the 109 below is one that appears to show a bomb, probably AB type, but its difficult to say for sure because of the poor quality.

[Isegrim]

AB 250-2 German submunition Container.

 

 

http://www.warbirdsresourcegroup.org/LRG/ab250-2.html

[Kurfürst]

SD 4 HL (Sprengbombe, dickwandig, 4 kg, Hohladung - fragmentation bomb, thick walled, 4 kg weight, shaped charge). Its essential a HEAT cluster bomb with fragmentation effect as well.

 

The SD-4 HL consists of a cast iron bomb body, in which a cast iron nosepiece is screwed.

 

The body has a male threaded plug in the base, locking up the detonator-booster assembly in the base of the body. An eAZ66 electric impact fuze is placed in the nosepiece, locked up by the fuze retainer ring.

The tail is build up of four pressed sheet metal quarter parts, connected by spotwelds and a circular strut around the lower part of the tail. The tail is connected to the body by means of four sprongs punched into corresponding recesses in the body.

Inside the body a 32 degree truncated conical steel liner is placed, flanged at the base. The flange is slotted at three points, two for the electric wires, one for the locating pin. The explosive charge - 0,31 Kg (12 Oz) TnT or TNT-RDX 46-54 -, is poured into the body through the base of the body and around the cone.

A plastic support is placed between the cone and the nosepiece. Two holes are drilled through the top of the support in which the terminal pins of the e.AZ.66 fit. From here the wiring runs down the body, placed against the wall of the body before pouring in the explosive charge. In the base of the bomb the plastic ignitor housing is placed . It consists of three stacked plastic discs, the upper has a hat shaped part that houses the Kl.Zdlg.34, below that a ring housing the wiring for the ignition squib, the lowest ring is a closure / insulation. When the male threaded basecap is placed in the base of the body, a spring is placed between cap and lower ring for insulation purposes.

 

Functioning of the e.AZ.66 (empfindliche Aufschlag Zunder 66 / sensitive impact fuze 66) Electric impact fuze:

 

The fuze is a plastic mould fuze (1), containing a electric spool of 54 windings copper wire (2), forming a 0,75inch dia coil. A magnitized steel cylinder (3) is placed in the centre of the coil. Above this cylinder an aluminium threaded cylinder is placed (4), housing a screw (5) over which the impeller (6) is placed. The screw has longitudal indentations (knurled) in the upper part and a small square piece is protruding from the lower side. Behind this small square piece a sping (7) is held that serves as a contact switch as soon as the screw is moved upward. The impeller houses a spring loaded inertia bolt (8 ), which is housed in a of centre channel.

 

Operation

 

As soon as the bomb is released to the airstream the impeller starts to rotate the air allowed away through the holes in the fuze retaining ring. At a certain moment the rotation is sufficient to throw out the inertia bolt -compressing the spring- , enabeling the lower part of the bolt to grip into the longitudal indentations in the upper part of the screw. This will now unwind the screw, moving the impeller and screw upward and relaesing the spring-contact switch (7), closing the electric circuit. The bomb is now fully armed. On impact the impeller, the screw and the aluminium upper cylinder are hammered inward �either straight, either angular-, hammering the magnitized cylinder down. Moving the magnitized cylinder down induces an electric current that runs down the wire into the squib igniter (red), igniting the detonator and the Kl.Zdlg.34 and the main charge.

 

Penetration of the Hollow charge of the Sd-4 Hl is 130mm steel @ 60 degr. angle.

 

Length of comlete bomb : 310mm

Length of body : 212mm

Body diameter : 90 mm

 

The SD-4 HL bombs were used in so called AB (Abwurf Behalter) sub-munition containers:

 

74 bombs were placed in a AB-500-1 container

40 bombs were placed in a AB-250 container

 

The bombs were placed nose in tail in the containers , thus increasing fuze safety.

 

Penetration of the Hollow charge of the Sd-4 Hl is 130mm steel @ 60 degr. angle.

 

 

http://www.warbirdsresourcegroup.org/LRG/sd4hl.htm

Edited July 29, 2014 by Kurfürst
added penetration figures for SD 4 HL and operation principle

[NineLine]

More on the "Butterfly"...

[MiloMorai]

500kg bomb. note the tricycle landing gear required

 

[NineLine]

Is that an F?

[NineLine]

SD 4 HL (Sprengbombe, dickwandig, 4 kg, Hohladung - fragmentation bomb, thick walled, 4 kg weight, shaped charge)

 

74 bombs in AB 500-1 container, 40 bombs in AB 250 container

 

 

http://www.warbirdsresourcegroup.org/LRG/sd4hl.htm

 

 

Interesting... wonder how readily these were used? Did the K-4 carry these as well, or was it aleast qualified to?

[Kurfürst]

G-2/R1 "Jabo-Rei", long range fighter bomber.

 

500 kg bomb did not require tricycle gear on late 109G/K as these had tall tailwheels for ground clearance. The 500 kg bomb (SD type) could also mounted on the E model already, but ground clearance was marginal indeed with the short tail wheel.

 

109E with SC 500

Edited July 29, 2014 by Kurfürst

[PE_Tigar]

Is that an F?

 

Apparently G-2

 

 

 

Wikipedia says:

 

G-2/R1: Long-range fighter-bomber. It carried a bomb up to 500 kg (1,100 lb) under the fuselage and had a modified fuel system with underwing fittings for a 300 L (80 US gal) drop tank. As a standard Bf 109G had not enough ground clearance to carry a 500 kg bomb, a jettisonable auxiliary undercarriage was added just aft of the cockpit.[62] The prototype was the FiSk 199. No production known.

[Kurfürst]

Interesting... wonder how readily these were used? Did the K-4 carry these as well, or was it aleast qualified to?

 

It could carry the AB 250 and AB 500 bomb containers, so yes, it could carry the SD 4 HL too. The AB series had a lot of variatons, ie. what kind of small bomblets they would contain, but any of these could be carried.

 

In fact I believe the picture I posted is an AB series bomb on a 109K, but its hard to make it out due to poor quality of the photo.

 

SD 4 HL

 

[NineLine]

I need to collect as much data and try and convince some of these cluster munitions would be a nice addition to the K :)

[Kurfürst]

I think they would be also an option for D-9 / Me 262 as well... these are standard German bombs.

 

A good resource on german bomb types here: http://www.warbirdsresourcegroup.org/LRG/bombs.html

[NineLine]

Possible, if I can show they were qualified for those, and I can get them added for one... not a big deal to add them to others I am sure...

[Kurfürst]

That should be fairly easy - see the 109K manual listing the installable kits (Rüstsaetze).

 

See R I "Abwurfwaffe 1 x 500 kg oder 1 x 250 kg"

 

[71st_Mastiff]

"Teufelseier" (: Devil's eggs), also called butterfly-bomb (cluster-bomb); http://en.wikipedia.org/wiki/Butterfly_Bomb.

 

 

Copied by the Americans ...

 

 

this sir is a form of flattery, if it works copy it. make it your own.

[MiloMorai]

The SD2 saw use in the opening stages of Operation Barbarossa, the German invasion of the Soviet Union, which began on 22 June 1941. Twenty to thirty aircrews had been picked to drop SD2s and SD10s (10 kg submunitions) on key Soviet airfields, a flight of three aircraft being assigned to each field. The purpose of these early attacks was to cause disruption and confusion as well as to preclude dispersion of Soviet planes until the main attack was launched. It was reported that Kampfgeschwader 51 had lost 15 aircraft due to accidents with the SD2s, nearly half of the total Luftwaffe losses that day.