The Pacific War Online Encyclopedia
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Yokosuka K5Y1 "Willow"
|Dimensions||36'1" by 26'5" by 10'6"
11m by 8.05m by 3.2m
|Speed||132 mph at sea level
212 km/h at sea level
mph at 3280 feet
138 km/h at 1000 meters
|Climb rate||12 feet per second
3.7 meters per second
|Power plant||One 340 hp (254 kW) Hitachi Amakaze 21 9-cylinder radial engine driving a two-bladed wooden propeller.|
Type 89 machine gun (cowling)
1 7.7mm Type 92 machine gun (rear cockpit).
|External stores||2 66 lb (30 kg) bombs or 10 22 lb (10 kg) bombs.|
|Production||A total of 5,770 of all versions between 1933 and 1945. Most were built at various civilian plants rather than at the Yokosuka arsenal.|
The K5Y1 was the land plane version.
The K5Y2 was a float plane version, with two floats.
The K5Y3 was also a float plane, but with a
more powerful engine in a
more streamlined cowling.
Other versions were planned but did not see production.
The Yokosuka K5Y Willow biplane was the most numerous Japanese trainer aircraft produced during the war. Both land-based and floatplane versions were built.
The design dated back to 1932 and the prototype
flew in December 1933. The aircraft went into production at once,
remaining in production until the end of the Pacific War. Just 60
aircraft were produced by 1936, but thereafter large numbers were
ordered and the design was built under license by seven other
The Pacific War Online Encyclopedia © 2007, 2009 by Kent G. Budge. Index
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