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paolorhoads

Aerei con strato di aria compressa

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scusate, 2 anni fà, quando ancora avevo sky, ho visto un documentario sulle nuove tecnologie militari applicate all'aereonautica e ha fatto vedere un F-22 raptor modificato, per la cronaca era bianco, e aveva la carena piena di bocchettoni che tiravano fuori aria capace di annullare pressoche gli attriti ne sapete nulla a rigurado?

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Io ricordo una cosa del genere ma in quel caso si trattava dell'F-16Xl utilizzato dalla NASA, che pero l'aria anziche soffiarla la aspirava....

 

NASA

 

In 1988, the two airplanes were taken out of storage and turned over to NASA for research. The first aircraft was fitted with an active suction titanium glove encasing the left wing and delivered to the Ames-Dryden Flight Research Facility at Edwards AFB. Designed and built by North American Aviation (a division of Rockwell International), the glove had laser-cut holes that were nominally 0.0025 in (0.0635 mm) diameter. Distance between holes varied between 0.010 and 0.055 in (0.25 and 1.40 mm) depending on the suction. The glove covered over five square feet (0.5 m²) of the wing. It was intended to suck away turbulent airflow over the wing, restoring laminar flow and reducing drag. The aircraft was also involved in testing sonic boom characteristics, takeoff performance, and engine noise, for NASA's civil transport program.

 

The second aircraft (a two seater) had its experimental engine replaced with a General Electric F110-129. It accidentally achieved supercruise, a design goal of the F-16XL that was never attained in ETF testing, when it reached Mach 1.1 at 20,000 feet (6 km) on full military power. It was mounted with a passive fiberglass and foam glove on the right wing to examine supersonic flow, and an active glove on the left wing. This second glove was composed of fiberglass and foam over a titanium skin, and covers 75% of the wing's surface and 60% of its leading edge. The active portion consists the middle two-thirds of the glove, with laser-drilled holes leading to cavities beneath the wing. It was designed collaboratively by Langley research center, Dryden, Rockwell, Boeing, and McDonnell Douglas. The glove is intended as a testbed for supersonic laminar flow.

 

At the conclusion of their test programs in 1999, both F-16XLs were placed into storage at NASA Dryden. In 2007, NASA approached Lockheed Martin to request a study into the feasibility and cost of returning F-16XL #1 to flight status and upgrading it with many of the improvements found in the USAF's Block 40 F-16s. As of July, 2007, the study is still underway, however in the meantime F-16XL #1 has been taxi tested at Dryden and given systems checks.

 

Preso da qui: http://en.wikipedia.org/wiki/General_Dynamics_F-16XL :)

Edited by Einherjar

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