Boeing Truss-Braced Wing

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Boeing Truss Braced Wing are from Boeing examined airliner concepts with abgestrebten wing big stretch .

Model in the NASA wind tunnel in Ames

SUGAR volts

Boeing SUGAR Volt concept aircraft

SUGAR Volt is a hybrid aircraft proposed by a team led by Boeing's Research & Technology division. It is a series of concepts presented in response to a NASA call for proposals for future aircraft. It is suggested that SUGAR Volt use two hybrid turbo fans that burn conventional jet fuel when taking off and then power the engines with electric motors while in flight. SUGAR stands for Subsonic Ultragreen Aircraft Research, the "volt" part of the name "SUGAR Volt" suggests that it is at least partially powered.

SUGAR Volt would have around 70 percent fewer emissions than the average commercial aircraft today. The noise pollution will also be lower than with today's commercial aircraft. However, this hybrid electric approach has to be weighed against increased complexity, large electric motor, and the size and weight of the battery. Due to the partial use of electrical energy, the specific fuel consumption (SFC) can be reduced compared to a standard turbine design (turbofan or turboprops with lower consumption).

SUGAR Volt is constructed with a long, braced wing with a large aspect ratio, which reduces the induced drag . The wings of the SUGAR Volt would enable short take-off distances and generate less noise. The outer wings of the SUGAR Volt are supposed to fold, which saves space but increases the weight.

Transonic Truss-Braced Wing

After extensive tests of the wind tunnel at NASA Ames Research Center in early 2019, the result showed that an optimized braced wing with a strong sweep for the 52 m (170 ft) large wing enables it to fly higher and faster, from Mach 0.70-0 .75 to Mach 0.80 as in today's jet aircraft. Compared to aircraft with cantilever wings, fuel consumption should be reduced by 8-10%, and the technology should be operational by 2030-2035. Wing stretches up to 27 were investigated for current narrow bodies from 8 to 10. The design was presented at the AIAA conference in January 2019, and the wing folds outside of the struts to use the airport gates for the 36-meter Boeing 737. (ICAO airport code C)

It was to be tested in the NASA Transonic wind tunnel in Ames from the beginning of 2019 , and later in 2019 in NASA's 4.3 × 6.7 m subsonic wind tunnel in Langley . According to NASA's UEST plan, outlined in the 2023 New Aviation Horizons flight demonstration, a full-scale X-plane could be designed and tested. Boeing suggested modifying a turbofan powered MD-80 . For the series version, however, a parallel hybrid electric drive based on Rolls-Royce LibertyWorks' EVE concept of a geared turbofan would be used. With a 1.5 MW (2000 HP) electric motor / generator, which is mounted between the compressor and the fan with variable blade angle, additional power is fed in by batteries when starting. A blower mounted at the stern for boundary layer extraction would absorb the slow air flow over the fuselage, supply the flow with energy again and prevent it from becoming detached.

Individual evidence

  1. ^ Spreading our wings: Boeing unveils new Transonic Truss-Braced Wing , Boeing. January 8, 2019. 
  2. ^ Graham Warwick: Boeing Unveils Refined Truss-Braced-Wing Airliner Concept . In: Aviation Week Network , January 8, 2019. 
  3. ↑ Boeing Refines Truss-Braced-Wing Airliner Concept . In: Aviation Week & Space Technology , January 11, 2019. 

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