High Aspect Ratio
High stretch (AR = 18) keeps the induced drag low.
A new approach to efficient business aviation.
Aerodynamic Concept
Top Wing Configuration
The “Top Wing” configurations can have less vortices leaving the fuselage and less induced drag, if designed well. That may be the main cause why Darwin had the birds grow their wings on top.
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Low Friction
- Short cord (MAC 0.85 m) keeps the Reynnolds-Number small and reduces boundary layer thickness, thus reducing friction and parasite drag
Wing for true Longrange
Wing decoupling from Fuel-requirement
The wing geometry of a smaller size but long distance aircraft starts with the main fuel tank location
V ≃ l³
Fuel integration concept
If one needs bring a large amount of fuel in a relatively small aircraft, a new location concept inside fuselage becomes crucial.
Design target
High Altitude Flying in the low density low friction environment around FL500.
Resulting wing geometry
A wing only driven by aerodynamics and stress analysis can be designed slender and thin.
Airfoil Technology
State of the Art Profile
Needless to say The PJ III also uses – like industry standard - a laminar & supercritical profile, to achieve the speed of M=.76
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Cruise Design Point
Optimization of Aircraft for long flights near FL 500
- Coffin corner design is moderate by a target-spread of 40kts between lowspeed buffet (stall) and high speed buffet (Mach Limit)
- Easier to handle in case of AP failure high damping quality of long empennage.
Integrated Design
3.4 Coupling for Efficiency
The Piero aircraft consists of coupled system. This coupling, of removing the main fuel tank from the wing and integrating it into the fuselage enables this high efficiency wing with capability for high altitude low drag long range flight.
Just as the fuselage shape is coupled with the wings high lift devices for the short-field performance.
2. Fuselage
2.1 Efficient Shape
laminar profile turned into a 3-dimensional body of revolution
- Nature uses “non cylindrical” formats but a modified body of revolution
-Not cylindrical formats for a reason!
View of PJ III fuselage from below
Integrated Fuselage Design
Fuselage Optimisation Concept
Cabin
2.3 Cabin Diameter Comparison
Interior
Cabin Configurations
Final Summary
PJ III – Key Benefits
Every major design decision contributes to one goal: achieving more capability with less aircraft.
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