The first HP establishment anniversary special plan / May 9. 2000 first edition

B-29 PHOTO MUSEUM
(The 1st floor)
Japanese
Visitors Number
 Since May 9. 2000

"Advanced pursuit of Heavy Bombers Boeing B-29 Superfortress"

Welcome to B29 Photo Museum.
B29 is the heavy bomber that U.S. develops and manufactures during the second world war. It is the heavy bomber that never can forget even for the nations of Japan. It is because it bombed 54 main cities of Japan proper with indiscrimination. Furthermore an atomic bomb was dropped to Hiroshima and Nagasaki. The bombing to the Japan proper by B29 was the total number of 15,000 machine. And, it is the strategic bomber that rounded off the second world war. Mainland bombing started from Jun 16.1,944 Yawata iron manufacture And, it was continued until the defeat days of Aug 15.1,945 of Japan. Meantime several 100,000 people of thing invaluable life was victims.

It is said that 485 machine are shot down even B29 that participated in bombing and most of 5335 American soldier was victims. And, even what kind of was the Superfortress? I introduce it while searching the new system of 55 years ago. Please see it slowly until it is last.

"Development circumstances" Japan and America outbreak of war before development of B29 in U.S. started in 1939. In 1940 the design details were produced. The Japan and America outbreak of war was Dec 8.1,941. In 1942 the first flight was done. The B29 style was manufactured 2513 machine by 1945. Furthermore 3942 machine were manufactured what, when the improved model of B29A B29B is included. The suggestion of this B29 was the Henlly Arnord head who was the commander of an American army air fleet with Nov1939. As for the main reason the axis power thinks case that South America continent a base is made somewhere including Germany. It is said that B29 was developed to defend America from the attack.

At that time, Sep1939.England and France decreed in Germany the front much. It was tied to Sep1940 the triple alliance of Japan Germany Italy. The environment of Japan and America outbreak of war was arranged. There was the threat of the "Messer shumit" fighter(755Km/h) of Germany technically the military affair at that time. The research of the atom nuclear physics was advanced to secrecy in U.S. As for U.S., Sep1942 already achieved the victory with Midway naval battle Jun1942 at the time of the first flight of B29. The American Allied Forces turned it to the position island attack of the Pacific southwest area at the opportunity of this.

Since then, the improvement of B29 was advanced. And, B29 that was produced expanded loading bomb capacity after that. And B29 reached out operation distance for 5000 km. And such a measure that the gun support for the antiaircraft battle is strengthened was taken. From at this time B29 was made to the strategic bomber of the Japanese Islands attack exclusive use aiming at Tokyo Hiroshima Kitakyuushuu Nagasaki and the others. Also, the background of this B29 large strategy The Japan related strategy of such the Loose Belt president that ruin be complete was been a start the Japanese empire that turns over in the over there of the Pacific and expand turning over. It begins to the body design as Tool that fills the various needs of the aviation strategy.

The B29 strategy was constructed including to the method that is rescued the crew who it was shot down in the commissariat strategy application and sea from the training of production crew with a flying boat and submarine. Moreover, the center of the magnificent technology strategy system was B29. And, succeeding the large production increase of B29 was started with the that 3 company.

1.1.Boeing company Wichita, Kansaplant: 1620 machine/from Sep1943 to Nov1945.
2.Martin company Omaha, Nebraska piant:536 machine/from Jun in 1944 to Sep 1945.
3.Bell company Marietta Georgia plant: 357 machine/from Feb in 1944 to Jan 1945.


First, Please see B29 that came flying on the Japanese up in the air 55 years ago.

 1. B-29-90BW S/N 44-87,775 in flight


Please see excellent form in the flight of B29.
The cabin was equipment to air pressure adjustment and air conditioning. The crew bombed Japan proper while gnawing an apple.

Specification of the Boeing B-29 Superfortress

 It is the copy of the specification that is entered to
http://www.csd.uwo.ca/~pettypi/elevon/baugher_us/b029-03.html.
And it is the specification of B29 that this is disclosed in U.S.

Powerplant:
Four Wright R-3350-23 Duplex Cyclone eighteen-cylinder air-cooled radial engines each with two General Electric turbosuperchargers, delivering 2200 hp for takeoff and having a war emergency rating of 2300 hp at 25,000 feet.
Performance:
Maximum speed 357 mph at 30,000 feet, 306 mph at sea level. Maximum continuous cruising speed 342 mph at 30,000 feet. Economical cruising speed 220 mph at 25,000 feet. Initial climb rate 900 feet per minute at combat weight. An altitude of 20,000 feet could be attained in 38 minutes. Service ceiling 33,600 feet. Maximum range was 3250 miles at 25,000 feet with 5000 pound bomb load. Practical operational radius was 1600-1800 miles. Maximum ferry range was 5600 miles, rising to 6000 miles with the extra fuel.
Weights:
74,500 pounds empty, normal loaded 120,000 pounds, maximum overload 135,000 pounds.
Dimensions:
Wingspan 141 feet 3 inches, length 99 feet 0 inches, height 27 feet 9 inches, wing area 1736 square feet.
Armament:
Twelve 0.50-inch machine guns in four remotely-controlled turrets (two above and two below the fuselage) and in the tail, each with 1000 rounds of ammunition. In addition, early production blocks had a single rearward-firing 20-mm M2 Type B cannon with 100 rounds in the tail position. Later, two more guns were provided for the forward top turret. Maximum internal short-range, low-altitude bomb load was 20,000 pounds. A load of 5000 pounds of bombs could be carried over a 1600-mile radius at high altitude. A load of 12,000 pounds of bombs could be carried over a 1600-mile radius at medium altitude.


2.Overall dimensions and outline


Length 99 feet 0 inches (30.18m),
Wingspan 141 feet 3 inches(43.10m),
Height 27 feet 9inches (8.46m).


3."Enola Gay"Atomic bomb drop machine to Hiroshima


Serial NO 44-86292 was Enola Gay,
Which doropped atomic bomb on Hirishima
Enola Gay in Smithsonian museum exhibition
B-29-45-MO S/N 44-86292
Eleven crews of the Enola Gay complain of the justifiability
of the atomic bomb drop at present in the Smithsonian museum.
If there is not our action it is the battle after that and many victims occurred.


4.The nose front of Enola Gay


The famous Norden bombing sight has been attached inside the window.


5.Bock's Car, Atomic bomb drop machine to Nagasaki


Serial NO 44-27297 was Bock's Car -- tha Nagasaki bomber, now on display at WPAFB Museum, OH
In the Dayton air force museum during exhibition.@


6.Pilot station


Pilot's instrument panel and controls.

This is a pilot seat. There is the copilot seat similar to this on this right side. It is according to the B29 operation manual. The positions, operation purpose, operation method of these measuring device and control unit were caused the pilot completely mastered due to safe security. And determining the restriction of many flight it was causing them it observed.
The part that puted the cover of the photograph right edge that time is the Norden bombing sight of the highest military secret. The front is a Bonberder seat and able to drop a bomb in visibility fine condition in the daytime. As this Norden sight destroys it before the B29 crash it was commanded. This is a serious precise optic scale and Bomberder set up the air pressure temperature drop angles speed and other data of goal points of the bomber to the Norden sight. The attack goal was confirmed with the optic system. Deciding the distance interval to the drop bomb number shot point it was dropping it. Bomberder measures and records those data and fall need time. And they try hard to the accuracy improvement.


7.Flight Engineer station


Engineer's instrument panel controls and switch panel.

It is the engineer seat that is located behind the copilot seat of the nose inside right side. The instruments and operation lever and the likes for the engine 4 base are arranged systematically.
Even although it says B29 that time was the gasoline engine of the carburetor installation that the engine stops. Even although it says B29 that time was the gasoline engine of the carburetor installation that the engine stops. The adjustment of the various operation condition that begins from the start of the engine was conducted by these operation. Lubricant temperature of the engine, Temperature of the cylinder head and Adjustment of mixture gas etc, They operated manually. Also the temperature of the most important cylinder head adjusts the flap so as not to exceed permission temperature and prevented heating with the chill introduction. Furthermore, the prevention of the freezing of the carburetor and other it came flying to the Japanese up in the air while operating. It was to the security of the safe operation of B29 diligently in this way.


8.Radio Operator station


Here is Radio Operator station that is located behind the engineer station. There the high sensitivity radio machine and the operation machinery are set. The center on the desk the BC348H receiver, to line up in the 3 upper part command receiver, BC-306-A antenna tuner to the left side and the tube of the left hand is an oxygen mask.
The radio equipment in that time is all the vacuum tube style analogue. It is primitive in all of what when digital era thinks now. However, it is the high-class devices group that exceed the imagination to Japanese. At that time, the latest receiver of the Japanese army was he receiver of B29 is the high-class receiver equipped with a various addition circuit with latest superheterodyne. However, the tuning of the finals tube and antenna of the transmitter are the manual operation that searches the dip point while seeing the plate ammeter. The setting of transmission frequency,reception frequency used the frequency meter (Xtal). The reception dial was set up in quest of the number of rooms that appoints it from 2 frequency of the top and bottom of purpose frequency. Therefore all the operation are a manual and the communication technician is the era of a large activity. This method continued in 30 from 20 after the war. The Japanese army collected the BC-348-H receiver from B29 that shot down and was appointing the survey to the professor of an university. As for this BC-348 receiver the ham in the world was requesting it even for more than 20 years after the war. It was as even the ham of Japan crosses the sea in quest of this junk. 9. Communication tunnnel

9. Communication tunnnel


There are 2 bomb hangars of the center inside a machine. This photograph is the one that looked up at that of the front. Communication tunnnel is passing the screen center. The rail form thing that grows downward from the both sides is the hanger of a bomb.
As for Communication tunnnel as for they, there is around of in the tunnel where connects the cabin a crew it is saying CREW TUNNEL. Therefore the movement of the crew seems to be possible.


10.The back bomb warehouse


It is the photograph that shot the bomb warehouse of the back toward the front. The hanger of the right and left is an incendiary bomb of 220 pounds (100 kg). The central path is the thing for exhibition and do not exist in the actual body.

11.500 pounds (227 kg) usually bomb


Mainly they used it to the bombing of a military affair goal.

12.220 pounds (100 kg) incendiary bomb


This incendiary bomb makes each city of Japan the burned fields.
This incendiary bomb discharged 48 child incendiary bomb (Cluster bomb) in the air after the drop. And it fell in a city area like the fireworks while burning.


13. The propeller


It is right inside engine nasal. The propeller of over 5 m of diameter are a highlight.
This propeller absorbs the output of 2600rpm, 2200 horsepowers and become the propelling power of the speed 550 km/hr.

14.Wright R-3350-23 Duplex Cyclone
eighteen-cylinder air-cooled radial engines


This is the highly efficient resource of B-29.
The output is 2200hp with 1 base.
This photograph is the one that sets up the engine toward the axis and displayed. The axis of the upper part is an output shaft.


15.Diagram of Wright R-3350-23

Specification of Wright R-3350-23
Cylinder diameter 155.6 mm --- Piston stroke 160.2 mm --- Total displacement volume 54,860 cc ---Engine diameter 1, 413 mm --- Drying weight 1, 212 kg --- Gear ratio 0.35 (20:7) --- Compression ratio 6.85 --- Delivering 2200 hp/SL/28000rpm for take off --- War emergency rating of 2300 hp at 25,000 feet --- Standard output 1800hp/1400ft (4267 m)/2400rpm,
Turbochargers: Two General Electric B-11type turbosuperchargers, Gear ratio6.06:1. Fixing it to the engine each 2 base it controlled automatic it with an electron device.

In order that highly efficient is maintained with the durability of this engine they clarify the use temperature condition(Permission temperature). Specifically, temperature of the cylinder head : 260degree centigrade to/when output the takeoff --- 218degree centigrade to/70% of output continuation operation of the rating .
Lubricant temperature : 85degree centigrade at the time of continuation operation
Air temperature of the carburetor intake : Prevention of freezing as 30degree centigrade.
The engineer was able to adjust these temperature conditions easily. In this way securing the reliability of the engine highly efficient was drawn. Also, the biggest characteristic of this engine equipped the turbochargers of each 2 types to each engines of 4 base. And it is that it was able to fly the altitude of 12,000m highest. I think that this was very epoch-making for that time.


16. Main foot


This is the main foot that supports the huge forms of the gross weight of 60 tons. The photograph is a left main foot in appearance from the right rear.


17. Nasal


There is a R-3350 engine in this Nasal. The photograph is the right outside. Photograph left under is exhaust port. Furthermore exhaust port is in a right and left 2 place. The exhaust turbine supercharger that demonstrated power to a high altitude flight to, each is fixed.


18.12.7 mm the cannons equipped
at a batter machine gun/back surface


12.7 mm of cannons equipped at a batter machine gun of the body back surfaces are observed from the rear. The swelling of the main plane and nasal harmonize remarkably. The gunner was such a special grade seat and aimed for the interception fighter of Japan of up in the air waiting and fired away. However, visibility did not work in the night operations. It is grasped with the searchlight of a Japanese corps and became a mark.


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