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Old September 2nd 20, 11:07 PM posted to alt.binaries.pictures.aviation
Miloch
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Default ‘Flying-V’ model embarks on first test flight — with Airbus support [1/3] - flying-v-concept_77690.jpg (1/1)

https://www.flightglobal.com/aerospa...139999.article

A scaled model of the ‘Flying-V’ blended wing aircraft concept — first unveiled
by Dutch researchers last year — has completed its first test flight in Germany.

Airbus also emerged as the latest partner in the project, after Dutch flag
carrier KLM threw its weight behind the project last year.

Delft Technical University (TU Delft), which is developing the project, states
that the maiden sortie took place at an undisclosed German airbase, where they
had support from an Airbus team.

The scale model weighs 22.5kg, has a wing span of 3.06m and a length of 2.76m.
It was controlled via radio link, with TU Delft PhD candidate Nando van Arnhem
as the drone pilot.

Its two 4kW electric ‘ducted fan’ engines are powered by a 6kg lithium polymer
battery.

The test model performed a series of tasks, including take-off, manoeuvres and
approaches, until its batteries were nearly empty, before it landed.

Says team leader Roelof Vos, an assistant professor of flight performance and
propulsion at TU Delft: “One of our worries was that the aircraft might have
some difficulty lifting-off, since previous calculations had shown that
‘rotation’ could be an issue. The team optimised the scaled flight model to
prevent the issue but the proof of the pudding is in the eating. You need to fly
to know for sure.”

Vos notes that thrust was good and flight speeds and angles were as predicted by
the team.

However, he adds that the current scaled model design “makes it difficult to
keep the wings level, and caused the aircraft to have a somewhat rough landing”,
something that was also predicted in initial estimates.

To this end, the team will make use of the data collected to create an
aerodynamic model of the scaled flight model. It will also take the model out
for more test flights.

The Flying-V concept was first publicised at the sidelines of the IATA Annual
General Meeting in Seoul in June last year, when KLM signed an agreement to
support its development.

The concept features a V-shaped design that is passenger cabin, fuel hold and
wings in one, powered by a pair of rear-mounted turbofan engines.

It promises up to 20% better fuel efficiency compared to an A350, and is around
15% more aerodynamically efficient compared to conventional aircraft. In its
baseline configuration, the Flying-V would seat about 314 passengers in two
classes.



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