IDINTOS: the first prototype of an amphibious PrandtlPlane-shaped aircraft

Frediani, Aldo; Cipolla, Vittorio; Oliviero, Fabrizio

doi:10.1007/bf03404701

Cited by 17 publications

(21 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The box-wing layout has been first indicated by Ludwig Prandtl in 1924 [17] as the "Best Wing System" which minimizes the induced drag for given lift and wingspan. Research performed since 1990s at University of Pisa has confirmed that a closed-formsolution of the minimum induced drag problem exists [18] and that it is possible to apply the Prandtl's concept to several aircraft categories [19], including both transport and leisure aircraft [20,21]. In Prandtl's honour, the aircraft architecture based on the "Best Wing System" has been called PrandtlPlane.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, the scope of this paper is to present some specific methods and tools for the aerodynamic analysis and design of the PrandtlPlane, to be used in the conceptual stage of the aerodynamic design. In the first part of this paper, a tool for conceptual sizing of the lifting system of box-wing configurations, called AEROSTATE, is presented; this tool has been conceived for the aerodynamic design of PrandtlPlane configurations considering the cruise conditions and has been adopted in several research projects such as IDINTOS ("IDrovolante Innovativo Toscano", [20]) and PARSIFAL [22,24]. The AEROSTATE tool is based on a constrained aerodynamic optimization procedure and uses low-fidelity aerodynamic solvers to obtain a large amount of results and design information in a short time.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Tools and methodologies for box-wing aircraft conceptual aerodynamic design and aeromechanic analysis

Salem

Palaia

Cipolla

et al. 2021

Mechanics & Industry

View full text Add to dashboard Cite

A way to face the challenge of moving towards a new greener aviation is to exploit disruptive aircraft architectures; one of the most promising concept is the PrandtlPlane, a box-wing aircraft based on the Prandtl's studies on multiplane lifting systems. A box-wing designed accordingly the Prandtl “best wing system” minimizes the induced drag for given lift and span, and thus it has the potential to reduce fuel consumption and noxious emissions. For disruptive aerodynamic concepts, physic-based aerodynamic design is needed from the very early stages of the design process, because of the lack of available statistical data; this paper describes two different in-house developed aerodynamic design tools for the PrandtlPlane conceptual aerodynamic design: AEROSTATE, for the design of the box-wing lifting system in cruise condition, and THeLMA, aiming to define the layout of control surfaces and high lift devices. These two tools have been extensively used to explore the feasible space for the aerodynamic design of the box-wing architecture, aiming to define preliminary correlations between performance and design variables, and guidelines to properly initialize the design process. As a result, relevant correlations have been identified between the rear-front wing loading ratio and the performance in cruise condition, and for the rear-front flap deflections and the aeromechanic characteristics in low speed condition.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Tools and methodologies for box-wing aircraft conceptual aerodynamic design and aeromechanic analysis

Salem

Palaia

Cipolla

et al. 2021

Mechanics & Industry

View full text Add to dashboard Cite

show abstract

“…For example, Project IDINTOS (IDrovolante INnovativo TOScano) [21], conceived, developed and built a prototype of a box-wing (PrandtlPlane) seaplane. The design was supported by numerical simulations, wing tunnel and towing tank tests [7,18].…”

Section: Introductionmentioning

confidence: 99%

A Simple Model for Minimum Induced Drag of Multiplanes: Could Prandtl Do the Same?

Scardaoni

2020

Aerotec. Missili Spaz.

View full text Add to dashboard Cite

In a famous report about the induced drag of multiplanes, L. Prandtl conceived the Best Wing System: the lifting system having the minimum induced drag among all the other ones, for assigned wingspan and lift. The resulting shape was a boxwing, asymptotically equivalent to a multiplane having infinite wings. At the end of the report, he gave the performance of this optimal lifting system (in terms of dimensionless induced drag and vertical gap) through a curve, without presenting the method he used. Nowadays, modern computational aerodynamics show an excellent agreement between the numerical results and Prandtl's prevision. The first part of the paper aims at clarifying which method Prandtl used for the Best Wing System only. In the second part of the paper, starting from Prandtl's different approach for the biplane and triplane problem, we propose a simple model for the evaluation of the induced drag of multiplanes, using notions an aerodynamicist of 1920s likely had. We show that the limit multiplane having infinitely many wings, under the ansatz of elliptic lift distribution on the outermost wings and constant lift distribution on the innermost ones, matches the Best Wing System curve. This leads to a simple but interesting interpretation of the actual results.

show abstract

“…Frediani, et al [6] meneliti tentang optimasi prototipe pesawat amfibi berbentuk PrandtlPlane dari sebelumnya T400 dibandingkan dengan T700 dengan Metode CFD (Computational Fluid Dynamics). Bentuk hull atau pontoon dioptimasi dengan cara mengatur panjang hull, step height, deadrise angle, lebar hull, constant cross-section length, dan sudut kenaikan ekor dengan variasi sudut serang 6 o , 8 o , 10 o , 12 o , 14 o , 16 o , 18 o , 20 o , dan 22 o .…”

unclassified

Karakteristik Aerodinamika Pontoon Pesawat NXXX Versi Amfibi

Irsabudi

Jatisukamto

Sutjahjono

2021

JRM

View full text Add to dashboard Cite

Seaplanes are aircraft that can take off and landing on water. A seaplane’s requirement is its need to take off and landing on watery conditions which is equipped with a pontoon. Pontoon of a seaplane needs to be evaluated in terms of aerodynamics characteristics when a seaplane flies. The purpose of this study is to determine the correlation of various geometric combinations of deadrise angle, step height, and constant cross-section length with the values of coefficient of drag (CD), coefficient of lift (CL) and coefficient of moment (CM). The methodology was carried out by simulating Computational Fluid Dynamics (CFD) using OpenFOAM software. The results of this study could be concluded that deadrise angle affected coefficient of drag (CD), coefficient of lift (CL) and coefficient of moment (CM) with each value of 0.0055, 0.0044, -0.0036, while step height didn’t influence significantly on coefficient of drag (CD) and didn’t affect coefficient of lift (CL) and coefficient of moment (CM). Constant cross-section length didn’t affect significantly on coefficient of drag (CD) and coefficient of lift (CL) but increasing constant cross-section length increased coefficient of moment (CM) with a value of -0.0039.

show abstract

IDINTOS: the first prototype of an amphibious PrandtlPlane-shaped aircraft

Cited by 17 publications

References 6 publications

Tools and methodologies for box-wing aircraft conceptual aerodynamic design and aeromechanic analysis

Tools and methodologies for box-wing aircraft conceptual aerodynamic design and aeromechanic analysis

A Simple Model for Minimum Induced Drag of Multiplanes: Could Prandtl Do the Same?

Karakteristik Aerodinamika Pontoon Pesawat NXXX Versi Amfibi

Contact Info

Product

Resources

About