Lawson L-4

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

* Lawson L-4 - a Tri motor aircraft designed in the 1920's for overnight transportation See also - 1
* Lawson L-4, a 1924 American unflown biplane airliner * Liberty L-4, a World War I four-cylinder, water-cooled, inline, aero-engine 2
The Lawson L-4 was a 1920s American unflown biplane airliner, designed and built by the Lawson Air Line Company of Milwaukee, Wisconsin.3

Made by Lawson Air Line Company.

The eighteen-seat Lawson L-4 of 1920, perhaps the first true airliner, was tested experimentally. Major progress came in 1924 with the Stout corrugated metal aircraft.4
The Lawson L-4 of 1920, with a capacity of eighteen passengers, was probably the first airliner, although it was only experimental.5
Empty Weight Lb
9759
Wing Area Sqm
188
Eng 1 Type
Liberty L-12 V-12 piston engine
First Flight
1924
Eng 1 Kw
313
Span In
5
Gross Weight Lb
18645
Number Built
1
Empty Weight Kg
4427
Gross Weight Kg
8457
Height In
6
Primary user
Lawson Air Line Company
Manufacturer
Lawson Air Line Company
Max Speed Mph
110
Max Speed Kmh
177
Height Ft
17
Span Ft
111
Wing Area Sqft
2028
Met Or Eng
eng
Span M
34
Length Ft
54
Height M
5
Sequence
L-2 • L-4
Eng 1 Hp
420
Eng 1 Number
3
Length In
2
Length M
17
Category
United States airliners 1920-1929

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