Kayaba Ku-4

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The Kayaba Ku-4 was a research aircraft built in Japan in 1940 to investigate the possibilities of tailless designs. It followed designer Hidemasa Kimura's successful Ku-2 and Ku-3 designs for the Imperial Japanese Army. While these previous aircraft had been gliders, however, the Ku-4 was to be a powered by a pusher engine. It had a low, swept wing, and like the Ku-2, fins at the wingtips.

Work on the prototype was well advanced by April 1941, but the following month, Kimura's relationship with the Army soured following the crash of the Ku-2. The Ku-4 was cancelled, and Kimura eventually received only ¥17,000 of the ¥200,000 that had had been promised for the development of his tailless designs.

pecifications (as designed)

aerospecs
ref=
met or eng?= met

crew=One pilot
capacity=
length m=3.42
length ft=11
length in=3
span m=9.80
span ft=32
span in=2
swept m=
swept ft=
swept in=
rot number=
rot dia m=
rot dia ft=
rot dia in=
dia m=
dia ft=
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width m=
width ft=
width in=
height m=
height ft=
height in=
wing area sqm=9.0
wing area sqft=97
swept area sqm=
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rot area sqft=
volume m3=
volume ft3=
aspect ratio=
empty weight kg=
empty weight lb=
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lift kg=
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eng1 number=1
eng1 type=piston engine
eng1 kw= 90
eng1 hp= 120
eng1 kn=
eng1 lbf=
eng1 kn-ab=
eng1 lbf-ab=
eng2 number=
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eng2 kw=
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eng2 kn-ab=
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max speed kmh=180
max speed mph=110
max speed mach=
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range km=300
range miles=190
endurance h=
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ceiling m=
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armament1=
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armament6= aircontent
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References

*
* [http://www.defence.org.cn/article-10-15944.html 日本飞翼的短暂研究]