8,8 cm Flak 18 (Sfl.) auf Schwerer Zugkraftwagen 12t Sd.Kfz.8 Bunkaflak

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Similar to the Flakbus allready in game, the german army also produced another Halftrack armed with a 88mm Flak placed on it, dedicated to be anti tank, anti bunkers and also anti Air in 1939.
In game it would add to the halftrack action and give another iconic halftrack. While this is a upgrade/sidegrade ot the current Halftrack with 88, this could be added as a TT, Premium or Event vehicle with the Leaf camo (like the Prem Leapoard 2).

The Bufla was made befor the War as a dedicated moblisation of the 88 mm Flak, to target heavy fortified postions, Bunkers, enemy tanks and planes. Records show that it allready took place in the invation of Poland and battle of France where it was effectively used to fight bunkers and heavy enemy tanks, after that the remaining vehicles where used on the eastern front.

The Development started in 1938, the task to attack heavy fortificated bunker positions, along the StuG III, however from range. As such in 1938 the question came up how to make a simplefie the 8,8 cm Flak mount and make it mobile on a self propelled form. In a Conversation on 16.04.1938 between Dr. Ferdinand Porsche, Director of DB Wilhelm, Oberstleutnant Dr.Ing. Olbrich of Wa Prüf Amt 6 of HWA and lastly Hauptmann Reinhard of the Inspectorat of the Airforce where they talked about the state of development and problems.
It came up that a vehicle for direct buncer attacking was needed, along the Pz.Sfl.IVa, a cheaper alternative was searched. A Possible big enove chassis was found in the DB 9, which is the Sd.Kfz.8. On which a fixed Sockellafette (Podestrial Mount) was placed and a modified 8,8 cm Flak 18.
Modifications included that only 1 gunner existed with both vertical and horizontal on 1 side, instead of on the oppsid sideds like on the 40mm Bofors. Furthermore, to reduce weight and size, the Traverse and elevation was limited to -4° to 15° and 151° to each side.

The Sd.Kfz.8 was a the biggest brother along the 6 and 7, it was the Schwerer Zugkraftwagen 12t, which development started in 1931/32 to be used to pull heavy artillery (8,8 cm - 30,5 cm guns), carry up to 12 Solders and be used as a recovery vehicle for tanks. While it was a powerfull and reliable vehicle it was also quite expencive with around 46.000 RM, which was a reason why it along with the 9 was to be replaced for unification and rationalisation by the schwerer Wehrmachtsschlepper. Overall it was produced from 1939 to 1944 with 4070.


Pictures:(Click to show)


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The Gun:
8,8 cm Flak 18 L/56
-5° to +85° elevation, 151° Traverse each side. at 20-25°/sec
Gunshild of 14,5mm Reload speed of 4 Sec.


Ammo:(Click to show)

Ap:


Pzgr. (Apcbc) 9,5 kg 160g Fp.02 and Np.10 (215,04g) 820 m/s 157mm/10m

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Pzgr.39 (Apcbc) 10,2 kg 64g Fp.02 and Np.10 (108,8g) 780m/s 167mm/10m

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Pzgr.40 (Apcr) 7,3 kg 35x140mm 1,93 kg core 930m/s 211mm/10m

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Gr.39 Hl (Heat) 7,64 kg 650g H.10 (1,1kg) 600 m/s 110mm/all

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8,8/5,25 cm Pfeilgeschoss (APHEDSFS) 8,4/7,9 kg 0,8 kg Np.10 870m/s 190mm/10m


He:


Sprgr. L/4,5 (He-TF (No Tracer)) 9 kg 900g Fp.02 and Np.10 840m/s 18mm/10m 13mm/all

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Br.Schr.Gr. (Shrapnell Incendary-TF (No Tracer)) 9kg Filler see inside Spoiler 840m/s

Expelling Charge: 56g Smokeless powder
Brusting Charge: 114g Amatol
Incendary Pelets: 72x of 30mm x 15mm
Made of Barium Nitrate, Magnesium Alloy, Alluminium Alloy, Acid Insoluble
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The Vehicle:
Sd.Kfz.8 Gepanzert
Weight: 14,7 Ton
Dimensions: 7,35 m / 2,5 m / 2,77 m
Crew: 6
Engine: HL 85 TUKRM 12 Cylinder 185 Ps
Speed: 51 km/h
Armor: 8-14,5mm

Source:
Sd.Kfz.8 Manual
Munition der 8,8 cm Flak 18
Geschossringbuch I
Private Photo collection
Flickr

7 Likes

A another Flakbus ? Maybe a BP reward in the future.

Good job !

+1

they modified the cannon somewhere early during its production to have the same elevation of the 8,8mm Flak.37 cannon mount, sometimes with the sliding plate between the left/right guard sometimes with nothing as pictured below
from -5/15+ to -5 / 85+ I don’t believe the horizontal traverse was solved because I believe it was caused by the recoil mechanism of the cannon and its mounting location.

Maximum_elevation
this is the early gunshield mount (note the horizontal brace at the top of the gun shield
Sdkfz_8-4_Explained
ammo storage the soldiers are sitting on the sides are wicker ammo transport cases (ie. wood) I can provide more pictures of the flak 88’s with stacks of them with better clarity
Wicker_transport Case

2 Likes

Do you have also more info on the He rounds, specifically weight and Velocity? I have seen a video where a dude sayed 9,2 kg and 840m/s. I do have a source (W127 Sammlung) that also gives a velocity of up to 820/840m/s, but doesnt specify the weight and in game the weight us 9 kg but only the 820m/s.

+1 For the flakbusses. I wanna see Germany get every last one

I don’t off hand, but a good place to look would be T.L. Jentz and H.L. Doyle (Panzer Tracts Dreaded Threat The 8.8 cm FlaK 18/36/47 in the Anti-Tank role).

I dont have access to it at the moment but I’ll keep an eye out for it.

edit some of the names provided for the rounds from

8.8cm Sprgr. Patr. (9.4kg, with 30-second time fuze)
8.8cm Sprgr. Az. (HE w/contact fuze)
8.8cm Sch. Sprgr. Patr (shrapnel)
8.8cm br.Sch.Gr.Patr. (shrapnel)
8.8cm Pzrg Patr (9.5kg APHE 810m/s)
8.8cm Pzgr. Patr. 40 (APCR tungsten cored)
8.8cm H1 Gr.Patr. 39 Flak (Hollow charge with 165mm of pen at 1km)

doing some more digging
https://www.lonesentry.com/manuals/88mm-antiaircraft-gun/ammunition-german-88-mm-aa-gun.html
weights are given as fired (ie. projectile only)
8.8 cm. Sprgr. Patr. L/4.5 (kz.) m. Zt. Z. S/30 (8.8 cm. fixed H.E. shell, with spring-wound mechanical 30 second time fuze)
20.06 lbs (9.1kg) 2,690ft/s (819.9m/s)

8.8 cm. Sprgr. Patr. L/4.5 (kz.) m. Zt. Z. S/30 Fg1 (8.8 cm. fixed H.E. shell, with inertia-operated mechanical 30 second time fuze)
20.06 (9.1kg) 2,690ft/s (819.9m/s)

8.8 cm. Sprgr. Patr. L/4.5 (kz.) m. A.Z. 23/28 (8.8 cm. fixed H.E. shell, with 0.11 second Superquick percussion fuze) 20.34lbs (15.4kg), 2,690ft/s (819.9m/s)

8.8 cm. Pzgr. Patr. m. Bd. Z. (8.8 cm. fixed A.P.C. shell, with base-detonating fuze (no-delay)) 20.71lbs (9.4kg), 2,657ft/s (809m/s)

and more sources on 8.8cm rounds

I misslooked at my source. And i came to the conclusion that its propably super charged.

I am 100% certain now that its 9 kg 840m/s 9,5 kg 820m/s and that 9 kg 820m/s is a reduced charge. I found another primary source for both Flak and KwK that also give 9kg 840m/s.
(A bit low quality, because its too big.)

1 Like