LAPAN XT-400

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The LAPAN XT-400 was a twin-engine STOL utility aircraft under development by the government of Indonesia in the late 1970s into early 1980s. The programme was cancelled without the prototype having been completed or flown. It was to have provided passenger and cargo transport from rough and unprepared fields, with secondary roles as an aerial survey platform and air ambulance.

The design itself was that of a conventional, strut-braced, high-wing monoplane, similar in general appearance to the Britten-Norman Islander, but with an upswept rear fuselage to provide for clamshell cargo doors underneath the tail. The main units of the fixed, tricycle undercarriage were carried on short stub-wings on the lower fuselage, which also provided the attachment points for the wing struts. This arrangement allowed the fuselage to maintain a rectangular cross-section along its length without landing gear components or attachment points intruding into the cargo space. The original design was for an eight-seat aircraft, but a follow-on version with 12 seats was anticipated. Had it flown, the XT-400 would have been the first aircraft of Indonesian design to carry more than three people. Construction throughout was of metal.

Work on the prototype commenced in 1977, with a first flight anticipated in 1980. This, however, was not to be, and the XT-400 project was cancelled in 1981 with the prototype still unfinished.

pecifications (as designed)

aerospecs
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crew=One pilot
capacity=7 passengers
length m=10.2
length ft=33
length in=6
span m=14.59
span ft=47
span in=11
swept m=
swept ft=
swept in=
rot number=
rot dia m=
rot dia ft=
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dia m=
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width m=
width ft=
width in=
height m=4.30
height ft=14
height in=1
wing area sqm=25.4
wing area sqft=273
swept area sqm=
swept area sqft=
rot area sqm=
rot area sqft=
volume m3=
volume ft3=
aspect ratio=
wing profile=
empty weight kg=1,422
empty weight lb=3,136
gross weight kg=2,540
gross weight lb=5,600
lift kg=
lift lb=

eng1 number=2
eng1 type=Lycoming IO-540C
eng1 kw= 187
eng1 hp= 250
eng1 kn=
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max speed kmh=273
max speed mph=170
max speed mach=
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stall speed kmh=
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range km=965
range miles=600
endurance h=
endurance min=
ceiling m=4,665
ceiling ft=15,300
g limits=
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armament6= aircontent
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References

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