Lawson L-4

Lawson L-4

infobox Aircraft
name = L-4
type = Three-engined biplane airliner
manufacturer = Lawson Air Line Company


caption =
designer =
first flight = 1924
introduced =
retired =
status =
primary user = Lawson Air Line Company
more users =
produced =
number built = 1
unit cost =
developed from =
variants with their own articles =

The Lawson L-4 was a 1920s American unflown biplane airliner, designed and built by the Lawson Air Line Company of Milwaukee, Wisconsin.

Design and development

In 1924 the Lawson Air Line Company had a need for an airliner to use on the night service between Chicago and New York. The L-4 was a three-engined biplane airliner which was fitted with sleeping berths, lavatory and unusually a shower unit. When the aircraft was preparing for its first flight the aircraft got stuck on soft ground, in an attempt to taxi the aircraft from the soft ground it was severely damaged. Before the aircraft could be repaired and flown the company folded.

pecifications (L-4)

aerospecs
met or eng?= eng

crew=
capacity=
length m=16.51
length ft=54
length in=2
span m=33.96
span ft=111
span in=5
swept m=
swept ft=
swept in=
rot number=
rot dia m=
rot dia ft=
rot dia in=
dia m=
dia ft=
dia in=
width m=
width ft=
width in=
height m=5.33
height ft=17
height in=6
wing area sqm=188.4
wing area sqft=2,028
swept area sqm=
swept area sqft=
rot area sqm=
rot area sqft=
volume m3=
volume ft3=
aspect ratio=
empty weight kg=4427
empty weight lb=9,759
gross weight kg=8457
gross weight lb=18,645
lift kg=
lift lb=

eng1 number=3
eng1 type=Liberty L-12 V-12 piston engine
eng1 kw= 313
eng1 hp= 420

max speed kmh=177 (estimated)
max speed mph=110 (estimated)
cruise speed kmh=
cruise speed mph=
range km=
range miles=
endurance h=
endurance min=
ceiling m=
ceiling ft=
glide ratio=
climb rate ms=
climb rate ftmin=
sink rate ms=
sink rate ftmin=

armament1=
armament2=
armament3=
armament4=
armament5=
armament6=

References

*cite book |last= |first= |authorlink= |coauthors= |title= The Illustrated Encyclopedia of Aircraft (Part Work 1982-1985)|year= |publisher= Orbis Publishing|location= |issn=

External links

ee also

aircontent

related=

similar aircraft=

sequence=
L-2 • L-4
lists=
see also=


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