Cardboard Model 02 - Junkers Ju-87 ...

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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
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