The Development of Boeing’s 367-80
or
Charging Into the Jet Age
Armed With Only a Slide Rule and Spline
.
Ben Almojuela
Boeing Commercial Airplanes
Pacific Northwest AIAA Technical Symposium
Nov. 7, 2009
Background: USA 1946
• Wartime rationing of seats on airline flights is
rescinded
• People were exposed to flying via passenger
airplane during the war
• Many military transport airplanes are declared
surplus and are converted to commercial
transports
• Douglas emerges from the war known as
the transport company; Boeing is known as
the bomber company
Commercial Airliner Competition
1946-52
Convair 240/340
Lockheed Constellation
Martin 404
Douglas DC-4
Boeing Stratocruiser
Martin 202
US Commercial Airplane Deliveries
1947 - 1952
160
140
120
Convair
Martin
100
80
Boeing
20
Lockheed
40
Douglas
60
0
1947
1948
1949
1950
1951
1952
Boeing is a bomber company
that “dabbles” in commercial transports
12
Built
1938
XB-15
Model 314
10
Built
1938
B-17
Model 307
56
Built
1947
B-29/B-50
KC-97
Model 377
Reducing Development Risk
New Transonic
Jet Transport
B-47
B-52
Aggressively swept wing
Podded engines
Stratoliner
Stratocruiser
Passenger fuselage
Landing gear
The Foundation
BTWT
Transonic
Knowledge
1946 Concept
W.L. Kellerman Dated December 9
1949 Concept (B-47 Derived)
Configuration Evolution from 367/377-
Configuration Evolution from 473-
473-60C Wind Tunnel Model
473-60C Wind Tunnel Model
707-6 (1952)
707-7 Alternatives
367-80 “Firm Configuration”
Span
Length Overall
Height
Fuselage Width
Main Gear Track
Max TO Weight
Operating Empty Wt
Engines
SLST – ea
Max Passengers (if equip)
Max speed
Cruise speed
Service ceiling
Max range (no payload)
130 ft
127 ft 10 in
38 ft 3 in
11 ft
21 ft
190,000 lb
88,890 lb
PW JT3P
9500 lb
130
478 kt @ 35000...