Revell 1/32 Messerschmitt Bf.109G6/R6 Trop
Italian Gustav
by Hubert Kendziorek

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Messerschmitt's Bf 109, the backbone of the Luftwaffe fighter force, had reached its pinnacle with production of the F series and as the Luftwaffe began taking delivery of the "Fritz" no successor to the Messerschmitt progeny was on the drawing board. Consequently, during the summer of 1941, as the German juggernaut knifed deep into Russia, the Messerschmitt design team was engaged in an update of the now aging Bf 109. Under the designation Bf 109G, or "Gustav" as it affectionately became known among the piltos, this version was to become the most numerously produced variant.

Dictates of the air war forced the Messerschmitt design people to sacrifice handling and maneuverability in order to increase maximum speed. Designed around the more powerful but heavier Daimler-Benz DB 605 engine, local strengthening was required which increased weight which, in turn, required that the undercarriage be strengthened which again increased weight; all of which increased wing loading and decreased handling characteristics. The DB 605A powerplant featured an increased cylinder capacity that raised compression to 7.3 in the port cylinder bank and 7.5 in the starboard, increasing rpms to 2800 and horsepower to 1,475 at take off, with no increase in overall engine dimensions. Weight of the new G series escalated to over 6500LBS, but the RLM felt that, given the war conditions, the consequent loss of handling was a fair trade off with the gain in power and speed achieved by the DB 605 installation. Many pilots in the field felt otherwise, claiming that the "G" series was a regressive step from the F series.

To house the DB 605A engine, no change was made in the upper contour of the cowling, however the oil cooler was deeper and of a slightly different shape, similiar to the "Z" option of the F. There were a number of differences in the panel lines forward of the cockpit especially around the windscreen where the lower oblique glass panel was deleted. The size of the supercharger intake was the same as the F-4 and the broad-bladed propeller of the "Z" became standard. However, without close examination the "Gustav" was in fact quite similar in appearance to its predecessor. A redesign of the fuel tank caused the fuel filler to be relocated from below the cockpit to the spine behind the cockpit. The wheel wells again reverted to the squared shape of the E and early F types in anticipation of covers that were never produced.

With the air war moving to ever higher altitudes, the need for a pressurized fighter dictated that the Gustav be produced with this provision. A cold wall type of pressurization was developed for the Bf 109G with the firewall, floor sidewalls and sloping armor plate behind the seat being sealed with rubber strips sealing the joints around the hinged canopy. The glazed panels of the greenhouse were layered with air sandwiched between them, a calcium chloride pellet maintained dryness. The pressurization resulted in a redesigned heavier canopy, sealed with rubber strips allowing a pressure differential of 4.4LB/sa FT. While pressurization was deleted on the majority of Gustavs, the provision was available on each machine by the addition of equipment. When pressurization was deleted, a small fresh air ventilation scoop was positioned just below the windscreen. [1]

Production of the DB 605 powerplant was delayed, consequently the preproduction batch of twelve Bf 109G-0s were completed with DB 601E engines during fall and winter of 1941. The cowling and other external features of the G-0, however, were essentially the same as subsequent DB 605 equipped production machines. The DB 605A-1 was finally certified for production installation during early spring of 1942 with production of both the G-1 and G-2 commencing immediately. The pressurized G-1 and non-pressurized G-2 were run simultaneously on the assembly line, being essentially pressurized and unpressurized versions of the same variant, however, the Bf 109G-2 actually preceded the G-1 s service introduction by several weeks.

Provision was made for installation of a GM 1 nitrous oxide power boost system, previously used on the 'Z' option powerboost system under the designation U-2. Weighing more than 400LBS, the GM 1 nitrous oxide system, known as Goring's Mischung (Goring's mixture), had a tremendous affect on performance, not only allowing the G to operate above the rated altitude for the DB 605, but to literally leave a pursuing Spitfire V standing still.

A short time after service introduction of the G series, operational units began reporting fires shortly after take off, sometimes causing the loss of both aircraft and pilot. Testing eventually showed that during overheating the horseshoe shaped nose mounted oil tank seeped oil onto the hot engine, causing a flash fire. After ascertaining the problem, two small cooling scoops were introduced on each side of the nose, cooling the oil tank. General Kesselring and others have attributed the death of Hans-Joachim Marseilles to one of these oil fires, however, British Aviation Historian Jack Foreman has reported that a fracture in the glycol line was responsible for the fire that forced Marseille to fatally abandon his aircraft. Marseille was flying a Bf 109G-2 W. Mr. 14256.

Low oil pressure plagued the DB 605 engine throughout its operational career. Damiler- Benz maintained that the horseshoe oil tank was at fault while the Messerschmitt people claimed that the hydraulic supercharger trapped air bubbles in the oil. Eventually the DB people developed and installed a de-aerator but when no improvement was found the de- aerator was discarded. The oil pressure problem was never satisfactorily solved.

The G series was the true workhorse of the Luftwaffe's Day Fighter Units, with over 10,000 being produced in ten basic variants. Every day fighter unit and eight foreign countries used the 109G through the end of the war. [1]

Regia Aeronautica Messerschmitts
On 18 May 1943 4. Stormo C.T. based at the Ciampino airport got its first two Bf 109s and began preparations for the changeover to the German fighters, although ultimately this did not happen and their Messerschmitts were transferred to 23 ° Gruppo CT (70a, 74a, 75a Squadriglie) 3o Stormo, based at the airport Cerveteri, Lazio, where they arrived in July 1943. A total of 11 Bf-109G, which had replaced, or rather complemented, the Macchi C.202 Folgores (taking into account that on 8 September 1943 some Macchis were still on register with 23o Gruppo).

Up to the ceasefire, of the 11 Messerschmitts, there were probably none left (although some sources indicate that at the beginning of September, one Bf.109G6 was still in service), because available reports of Regia Aeronautica on 8 September 1943 listed for 23o Gruppo only aircraft of Italian production.

[1] Beaman Jr., J. R. and Greer D., "Messerschmitt Bf.109 in action, Part 2", Squadron Signal Publications, Aircraft Number 57, 1983

[2] D'Amico F. and Valentini G., "Camouflage and Markings of the Aeronautica Nazionale Repubblicana, 1943 -1945", Classic Publications, 2005

[3] Alegi G. and Gueli M., "Ali Straniere in Italia, Messerschmitt Bf.109 Italiani", La Bancarella Aeronautica, Torino, 2002

[4] Alegi 2002, p. 32.




[8] (a great website for those interested in the contributions of Italy during the Second World War, however in Polish), and of course a lot of other books and webpages related generally to the type, as well as information and suggestions from and forums users, which I appreciated very much.

The Model
The model presented here is wearing the color and markings of the Bf-109 G-6 / R6 / Trop W.Nr. 18... "5-70 Nero", 70a Squadriglia, 23o Gruppo Caccia Terrestre "Vespa Arrabiata", 3o Stormo, Rome-Cerveteri, Summer 1943. There is probably only one picture of this plane, showing the left side of it. Despite my best efforts I was unable to find out the name of a pilot, to which the aircraft was allocated.

I used Revell’s 04665 kit almost out of the box, with the addition of:
1. resin barrels of the machine guns from Aires
2. resin tropical air filter from the Aires
3. resin guns with gondolas from Eduard
4. resin exhausts from Eduard
5. the tail wheel borrowed from the Hasegawa kit
6. parasol holder from the scratch

The model is very enjoyable to build, however at some points its a little complicated in terms of engineering. It has also its shortcomings in terms of compliance with the actual aircraft, which can be quite easily overcome if the will is there - anyway to me it looks like a Messerschmitt.

What needs particular attention in my opinion are:
- the harness, in this scale its a bit strange thing that it is molded on the seat, but I left it as it is because the cockpit was to be closed;
- upper wings, that really require precision during the assembly to make it fit perfectly.

Painted with Gunze H series paints and Grigio Azurro Chiaro from Italeri (the wings crosses were painted over with this colour), markings airbrushed using Montex masks K32051 Bf-109G6 (Italy) for the Hasegawa kit, the stencils are decals from the box (some silvering despite the use of MarkFit).

Highly recommended.

Technical Data
Aircraft: Messerschmitt Bf.109G6/Trop
Manufacturer: Messerschmitt A. G.
Type: Fighter
Year: 1943
Engine: Damiler Benz DB 605A-1, 12-cylinder V, liquid-cooled 1,475hp
Wingspan: 32 ft 0 in (9.95m)
Length: 29 ft 7 1/8 (8.84m)
Height: 8 ft 2 ˝ in (2.49m)
Weight: 6,834lb (3,095 kg) (Loaded)
Maximum Speed: 386 mph at 22,000 ft
Ceiling: 39,370ft (12,000m)
Range: 528miles (850km)
Armament: 2 x 13mm MG 131 MGs, 1 x MG151/20 mm cannon
Crew: 1

Additional Images

Ali Straniere Messerschmitt Bf.109 #1 Italian Messerschmitt Bf.109 Aces Part I - STRM 48003/32001
Academy - Messerschmitt Bf109G-14 - ANR - MH1682
ICM - Bf 109F-4/R6, 1/48 - ICM48107

April, 2016
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