Done : Bf109G-6 Yellow 9 of JG54 Gruppe Build

[lesofprimus]

Thanks for lookin Jan.... I would say that u have completely confused me now Terry.... Lets see what Wayne has to say bout it.....

Appreciate the comments guys....

[Wurger]

Pressurised or unpressurised..... But I found that the small bulge was typical for DB605A engine and covered the oil deaeration filter.So it seems it doesn't have anything in common with any kind of cockpit.

[lesofprimus]

So Im better off using the top bulge in the pic, without the extra bulge???

[Airframes]

Ah! Now I understand!
Sorry Dan, someone once told me that the small bulge was for covering the compressor for the cockpit pressurisation system. What Wojtek stated about the engine makes more sense, and has started bells ringing. What I meant by using the 'bulged' bulge anyway, was that it's possible some aircraft came of the various assembly lines with this fairing fitted anyway, regardless of which ebgine etc would be fitted.
BUT, in the light of what Wojtek has said, I agree, I'd use the 'plain' cannon-breach bulge.

[lesofprimus]

Great, thanks for claifying that Terry and Wojtek....

[javlin]

Dan I have notes here that state "cowling type 040 with the necessary compressor bulge to operate the pressure system for the G-5 variant".When my camera batteries recharge will post pics.Kevin

[Screaming Eagle]

Great progress Dan!

[Wurger]

According to my info G-6 had been introduced into assembling shortly before G-5. There was a possibility of equipment it wit both DB605A and DB605D.The feature was called "Umrust-Motor".The diference was in an engine cooler radiators.For DB605A it was Fo870 radiator but for DB605D it was Fo987 one.
Waht is more I'm not sure if the G-6s were equipped with the pressurised cockpit at all.The main feature of the kind cockpit mount was a luck of small air intakes on sides below the windscreen.By the way, the pressurised cockpit was made with rubber insultation of the fuselage at the cockpit area from the cross-section between the engine compartment and the cocpit,including the cockpit floor, cockpit sides and the armour plate finishing the cockpit.The new cockpit conopy was made of double glasses sealed up with rubbers with smal boxes of CaCl2 between them to absorb moisture .So it seems that there wasn't any special system of the cockpit pressuration.Simply the cockpit was hermetic only.

Here is a pic of G-5 with caption I told you above. Source Muschroom Model Magazine Special Bf109G Yellow series vol.1.Note that there is a small air intake below the windscreen side.

[Wayne Little]

Two sources I have state that the small "bulge" is for the pressurisation compressor on the G-5.

Quote from Bf109F,G & K series by Prein and Rodeike "In general the G-5 resembled the G-6 in all respects except that it had a pressurized cockpit. With the adoption of MG 131 heavy machine guns in place of the earlier MG 17s there was no longer room for the pressurization compressor on the left, upper side of the engine block. It was therefore relocated to the right side of the engine and was responsible for the small tear drop shaped fairing seen beneath the bulge for the MG 131. The compressor inlet scoop was moved from the leftside of the cowling to a position above the compressor fairing. Although totally superfluous for non-pressurized machines, the compressor fairing was retained by many later G-6 and G-14 models, often without the inlet scoop, however."

Now it is still a guess as to whether the 'bulge' was present or not..?? Sorry Dan it still really becomes your call

[Wurger]

So, taking it into considerstion it can be stated that G-6 didn't have the pressurized cockpit did it? But it was possible the G-6 could be equipped with the G-5 engine cowling.

[lesofprimus]

Thats what it sounds like Wojtek... Thanks for the extra research fellas....

[Wurger]

You'r welcome Buddy.....

[Wayne Little]

So, taking it into considerstion it can be stated that G-6 didn't have the pressurized cockpit did it? But it was possible the G-6 could be equipped with the G-5 engine cowling.

Absolutely correct!

[Wurger]

[Lucky13]

I'd go with the "standard" "bulge" Dan....