Kurfürst

Well, can the skins be changed if one wants to...?

Correction - the British did not measure ClMax of the 109E at all, they simply guessworked it from available Clmax figures for the Spitfire - which themselves were estimations from stall speed tests. As for the Clmax measured at Charles Meudon - its a rather useless figure without stating the conditions. What about the F-K having different wings, flaps and slats and wingtips...? P.S. Not that I find any particular Clmax figures especially attractive but when guesswork is countered by guesswork, it is useless.

Well we will see if I can even take off in DCS LOL ! :D But I am not as much interested in the manual about how the thing works, but rather, to what extent systems are being modeled, which would show from the description. ;)

I mean - before release?

... and in that case it would have the same amount of horsepower (slightly less, actually) in an airframe that is about a ton heavier? The icy grasp of primal fear crawls up my spine indeed. Bottomline is, even the lowest powered version of the 109K has a powerloading of 535 PS / t. The Dora is about 488, the "proper fuel" US mustang would be about 413... and the P-47... ok, let's just leave the P-47. There are not too many piston engined fighter around that can claim the same. Hence why its such a hotrod.

Any chance for a DCS in-game K-4 manual?

I think its a feature - IIRC the generator wouldn't charge the battery below a certain rpm, and 1600 rpm sounds about right. Since on the Fw 190 most systems, including the landing gear are electronically actuated, its no surprise the gear will struggle once the battery is depleted due to heavy use and no charge..... :) It seems gentlemen that we have ourselves a lovely, lovely little detail.

Lots of speculations on Cl and wing profile characteristics, but what is needed is hard aerodynamics data...

The answer as to why is simple - aircraft under 5 tons did not require rudder trim in Germany. Thus neither the 109 or 190 had them, with some exceptions (there were some bad weather variants with course setting auto pilot managing the rudder). Larger aircraft had them, like 110 etc.

Can't wait for October. :)

This is from a post war Soviet book (secondary source, so not neccesarily accurate) power curve for DB 605 DC.

Full NACA report on roll rate of P-36, P-40, Hurricane, Spitfire V (metal ailerons). rollrate Р-36.40Хурик Спит.pdf

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"

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

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

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

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

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.

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.

Cool! Will be there option perhaps on D-9/K-4 to use the MW 50 tank as fuel tank (as they had this option for range increase)?

The usual 300 liter drop tanks on 109Ks

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.

They housed one 2cm Mauser MG 151/20 each, percussion firing type, unsynchronized. Tha ammunition is actually stored in the wing in a drum-like ammunition belt container. . They had most commonly reported to have 135 round for each gun. Some other sources mention down to 125 and up to 140 rpg. The two guns and their accessorizes weigthed 135 kg, and 215 kg complete with ammunition. The gondolas clean aerdynamic drag was equivalent of +0,0215 sq. meters of Δ[Fcw], or resulted roughly about -8 km/h speed loss at SL. To this needed to be added the increased induced drag resulting from the added weight of 215kg, i.e. roughly equivalent to about - 1,5 km/h at SL and about -6 km/h at rated altitude, as per this January 1944 document: http://kurfurst.org/Performance_tests/109G_Leistungzusammenstellung/Leistungzusammenstellung109G.html#dragitems_table The harmonization and external ballistics of the similarly armed G-6/U4 m. R VI was as follows:

* the ever-present 300 liter droptank of course, feeding into the main tank * 21 cm rockets were installable, as on the G-series. Not sure if that ever happened, given the general lack of use of the rockets by the 109K arrived. The manual says that the option (wiring?) was removed from later production planes, but given that we are getting an early 109K, it seems legit, or at least, fun :) * 2cm Mauser MG 151/20, gondolas guns, 135 rpg, as on 109G (R IV) * bomb sizes up to 500 kg (also 250 kg of course), all sort of types, ranging from the common SC, SD, PC 250 or 500 series. Also by this time the use of the AB series cluster bomb containers was much favored, these were loaded with a large variety of anti personnel i.e. SD 2 "butterfly" boms or anti-tank (hollow charge SD 4 HL) bomblets. Towards the end of the war there was also an increasing use of 109Ks against advancing US Army columns. Cannot recall if the 4x50 kg loadout was still used (given the AB bomb containers being so much more effective). * R4M, no I think, never seen trace of it, perhaps on experimental scale only.