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Flaps On Prototype 707

Mon Aug 11, 2003 3:59 am


In the recent photos of the Boeing 387, it appears that the trailing edge flaps are not the original type on the model. If I recall correctly (from old footage and photos from the 1950's), the trailing edge the 387's wing had a similar design to that of the production model 707. Was the wing reconfigured and if so, why?

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RE: Flaps On Prototype 707

Mon Aug 11, 2003 7:54 am

Didn't they use it to test 727 flaps?
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RE: Flaps On Prototype 707

Mon Aug 11, 2003 7:56 am

the type is actually 367

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RE: Flaps On Prototype 707

Mon Aug 11, 2003 10:51 am

The 367-80 was indeed reconfigured with the later flaps as seen on 727s.
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RE: Flaps On Prototype 707

Tue Aug 12, 2003 7:05 pm

The 367-80 has been modified several times to test various things. It did have triple-slotted flaps like those on the 727 at one point. Later it had a cofiguration known as "blown flaps" for another test. It has also had different landing gear to test landing on unpaved strips, a fifth engine mounted on the aft fuselage (also a test for the 727), and its original JT3C engines replaced by the JT3D's seen in the picture. At one point Boeing referred to it as "the most modified aircraft."
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