Cardboard Model Marek Pacynski 001 - Junkers Ju-87B.pdf - Model kartonowy - Marek Pacynski (Model Cardboard) - jchudzinski

Junkers Ju 87R (S2+MR) of 7./StG 77

with paint scheme used during the

Balkan campaign of April 1941. This

version of the Ju 87, with long range

underwing fuel tanks, was first used

operationally during the Norwegian

campaign in 1940.

Ju 87B (B-1/B-2) - An important development was that of

the automatic bombing or dive control system of the Ju 87B. This

consisted of an Askania autopilot, which was used together with a

Revi gunsight. The bomb release gear, elevator controls, and dive

brakes were linked to this system. Before attacking the pilot would

set the bomb release height and go thru a checklist of about 10 items.

The deployment of the dive brakes automatically set up the dive

adjusting the elevator trim tab, and putting the aircraft into a dive.

The use of the elevator was forbidden (except in case of emergency)

so the pilot used ailerons only when setting up the attack angle via red

degree lines painted at various angles on the canopy. When the bomb

release height was reached and the bombs were dropped and a light

came on the contact altimiter. All the pilot had to do was push a

button on the control column and the autopilot adjusted the elevator

trim tab again, so that the aircraft became tail heavy and pulled itself

out of the dive. The pilot thus needed not to be concerned too much

with the pull-out. This was just as well, because the pull-out put an

acceleration of 6 g on aircraft and pilot. Under such conditions one

could not expect the pilot to perform complicated control sequences.

Normal procedures called for a bomb release at an altitude of about

2,953 ft (900 m), which brought the Stuka down to about 1,312 ft

(400 m) before it started to regain altitude.

The Ju 87B was to be the standard model during the early

years of World War II. It was powered by the much more powerful

Jumo 211A engine. This engine had fuel injection, an important

feature for an aircraft which had to be subjected to heavy G-forces

and acrobatic manoeuvres making it immune to iceing and engine

cut-outs. A new engine cowling was designed, with a new air intake

on top of the cowling, and a deep half-circular radiator under it. The

radiator was larger for the B-2 model than for the B-1, because the B-

2 had an even more powerful engine, and it can only be described as a

deliberate insult to the aerodynamicists. The Ju 87B-1 was powered

by 1,200 hp (895 kW) supercharged Jumo 211Da engine with a SC

500 1,102 lbs (500 kg) bombload. The Ju 87B-2 was an improved

version with a 2,205 lbs (1000 kg) bombload. Some Ju 87B-2s flew

as single seaters allowing the use of a single 2,205 lbs (1000 kg)

centerline bomb.

The trousered undercarriage of the A-model was replaced by

a 'spatted' one, with closer-fitting leg covers and better streamlined

wheel spats. The change was more than cosmetic, for the

undercarriage was also redesigned and considerably strengthened.

The mainwheels were also moved slighlty backwards. If the Ju 87

had to operate from poor airfields, such as found at the Eastern front,

the spats were often removed because they tended to get clogged

with mud. It was not even uncommon for Ju 87s to have their

undercarriage ripped off when operating from such airfields. Speed

in a dive built up to about 342 mph (550 km/h) and it became

common practice to fit sirens, called 'Trumpets of Jericho' on the

undercarriage legs in a special fitting to enhance the effect on morale

of the Ju 87's attacks. This was driven by a small propeller on the left

undercarriage leg. When the siren was not installed the mount was

faired over, leaving a protrusion on the undercarriage. The sirens

were mostly discarded during the Battle of Britain, because they

reduced the performance of the already slow and vulnerable Ju 87.

The greenhouse canopy of the Ju 87B was also different of that of the

Ju 87A, with sliding sections for the pilot and the gunner, which

replaced the earlier hinged entry panels. The twin radio masts of the

JU 87A were replaced by a single, tall, vertical mast. Italy used

several examples of this aircraft under the name "Picchiatello" which

led to the mistaken belief that it was made in Italy as the Breda 201.

Three Ju 87B-1s made the first combat mission of World War II

wheny took of from Elbing at 4:26 am on 1 September 1939 and

devastated the approaches to the Dirschau bridger over the Vistula at

4:34 am, some 11 minutes before Germany declared war on Poland.

Subsequntly, the Ju 87B-1 played a tremendous part in the Polish

Campaign, destroying all but two of the Polish Navy surface

warships, heavily bombing Polish troops (on many occasions within

330 ft/100 m of advancing German forces. On one ghastly occasion

Ju 87B-1s virtually wiped out a Polish Infantry Division at the

Piotrkow railway station.

Ju 87R (R-1/R-2) - The Ju 87R was a long-range version of

the Ju 87B, with design features of the Ju 87C. The out-of-sequence

R-designation stood for `Reichweite', or range. They were intended

for anti-ship attacks, and proved very effective during the fights in

Scandinavia. An additional fuel transfer system was fitted, new fuel

tanks installed in the wing, and the outer wing attachment points

were modified so that 300 litre fuel tanks could be carried instead of

bombs. A single centerline 551 lbs (250 kg) bomb was the normal

ordnance. The R-1 and R-2 were equivalent to the B-1 and B-2, but

the R-1 had a longer range, because the B-2 model was heavier than

the B-1. One Ju 87R aircraft was tested carrying a large container

hung on the main bomb crutch, intending to carry spare parts and

other

cargo.

Type: Dive bomber and ground attack

Origin: Junkers Flugzeug und Motorenwerke AG

Crew: Two

First Flight: August 1938

Final Delivery: 1941

Engine:

Ju 87B-1

Model: Junkers Jumo 211 A

Type: Water-Cooled Inverted V12

Number: One Horsepower: 1,100 hp

Ju 87B-2

Model: Junkers Jumo 211 Da

Type: Water-Cooled Inverted V12

Number: One Horsepower: 1,200 hp

Dimensions:

Wing span: 45 ft. 31 in. (13.8m)

Wing Surface Area: N/A

Length: 36 ft. 5 in. (11.1m)

Height: 12 ft. 9 in. (3.9m)

Weights:

Empty: 6,080 lbs. (2750 kg)

Loaded: 9,371 lbs. (4250 kg)

Performance:

Maximum Speed: 242 mph (390 kph)

Cruise Speed: N/A

Range (With Bomb Load): 373 miles (600 km)

Initial Climb: N/A

Endurance: N/A

Service Ceiling: 26,250 ft. (8,000m)

Armament:

Two 7.92mm MG 17 machine guns in wings.

One 7.92mm MG 17 machine gun in rear cockpit.

Bomb Load:

One 1,100 lb. (500 kg) bomb on centerline.

Four 110 lb. (50 kg) bombs on wing racks

11a

10a

b d

15A

25B

25C

15d

25C

25A

28a

47a

28b

48A

48A 48A

48A

48B

49A

48B

Cardboard Model Marek Pacynski 001 - Junkers Ju-87B.pdf

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