Boeing 707
For many airlines the 707 was the first jet airliner
in service replacing older propliners. A total of 878 commercial 707s have been
built but there was also a large number of aircraft produced for military use.
Originally equipped with JT3B-engines some military variants have been
re-engined with the more advanced CFM56.
For the modelplane fiberglass nacelles are
available either for the JT3B or the wider CFM56 engine. The 707 has a large
wing area giving the model a low wing loading. The outboard engines are far
away from the fuselage so the pilot needs a lot of experience in case of engine
failure.
Powerplant: Glow: four 6.5 cc
(.40 cu.in.) engines
Turbine: twice 45 N
(10 lbs.) thrust
four times 23 N
(5 lbs.) thrust
Ducted Fan: diameter up to 105 mm
(4.1’’) (some military variants
only)
Specifications:
Span Length Wing Area Weight
B707-120B 2.49 m (98’’)
2.75 m
(108’’) 91.5 dm˛ (1418 sq.in.) 11
kg (24 lbs.)
B707-138B 2.49 m
(98’’) 2.56 m
(101’’) 91.5 dm˛ (1418 sq.in.) 10.5 kg
(23 lbs.)
B707-320B 2.78 m
(109’’) 2.91 m
(115’’) 110.7
dm˛ (1716 sq.in.) 12.5
kg (28 lbs.)
Pics:
(Norbert Rauch)
(Dieter Döring)
(Dieter Döring)