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into the territory. Kai Tak Airfield would presumably serve as the base for the B-29s. It was right on the shores of Victoria Harbour, which would make supporting the logistical requirements of the B-29 easier. On paper, its runways of between 4,500 to 4,800 feet long (1,372 to 1,463 metres) were just long enough to accommodate a B-29, which needed at least 4,375 feet (1,333.5 metres) of runway on a soft surface at sea level to take off.36 But such numbers were theoretical, because in practice a runway had to be much longer before it could safely operate a B-29.37 Lengthening Kai Tak's runways would be time consuming, if not impossible, because the area around Kai Tak consisted of mountains and dwellings.38 While there were other places in Hong Kong that were under consideration for airfields, none were as well-equipped or logistically supportable as Kai Tak.
Furthermore, a B-29 needed sturdier, preferably all-weather, runways to support its maximum 70-ton weight, and Kai Tak's runways were still mainly grass with a maximum load factor of 35 tons, although the Japanese began to convert them to concrete during the occupation. Prisoner of war labour was used to make this conversion, and sabotage ensued. By some accounts, the sabotage was so effective that in certain places the concrete could not even support the weight of a bicycle!??
The B-29 was built to withstand extreme weather conditions - at least on its exterior. During its manufacture in the U.S., the first batch was fitted out in blizzard conditions outdoors. When this first batch arrived in India, the weather shifted to the other extreme. Midday temperatures in India went as high as 115°F (46°C), which limited takeoffs to the early morning or late afternoon. Also, India was humid during the summer, which was monsoon season. Its rainfall during this time was even heavier than that experienced in Hong Kong. Rains caused the fields in which the B-29s were parked to become muddy, and much effort had to be spent freeing them, thereby wasting time.
All of these factors combined to affect the serviceability of the B-29s if they weren't maintained properly. In India, maintenance could only take place at night, which posed another problem. The maintenance crews required light to work during this time of the day, and the lights they used attracted insects, including malaria-bearing mosquitoes.?? Even without the weather, a good number of B-29s were out of order at any one time because such a new piece of equipment was bound to have defects.
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