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Solar Flight

Technology (HAPS)

Atmospheric Satellites «APUS-ApusDuo»

www.uavos.com

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General

Solar Flight Technology

Atmospheric Satellites APUS & APUS DUO

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Some of common problems:

  • Batteries power density >500Wh/kg
  • Solar cells efficiency >30%
  • Minimum allowed altitude >13km
  • Materials (robust and light)
  • Propulsion efficiency

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General

Required power:

Available power:

 

 

P - power [W]

S - wing area or wing surface [m2]

η - efficiency [-]

ρ - air density [kg/m3]

M - mass [Kg]

CL - lift coefficient [-]

GR - glide ratio

M/S - Wing loading (Kg/m2 )

g - acceleration of gravity

 

Solar Flight Technology

Atmospheric Satellites APUS & APUS DUO

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General

Power Balance

 

 

Priorities:

  • Wing load – power of 1.5
  • Glide Ratio – power of 1
  • Lift Coefficient – power of 0.5

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Solar Flight Technology

Atmospheric Satellites APUS & APUS DUO

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Wing Load

Wing Load problem

Solar Flight Technology

Atmospheric Satellites APUS & APUS DUO

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Wing Load

Uncontrolled bending leads to disastrous consequences

Solar Flight Technology

Atmospheric Satellites APUS & APUS DUO

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APUS 1

APUS 1st generation

Solar Flight Technology

Atmospheric Satellites APUS & APUS DUO

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APUS 1

Flexible Wing

  • No longeron
  • High aspect ratio
  • High L/D
  • Wing profile options

Solar Flight Technology

Atmospheric Satellites APUS & APUS DUO

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APUS 1

Airframe geometry control

  • No control surfaces
  • Formation flight principle
  • V-shape is controlled
  • Mass reduced by 30%

Solar Flight Technology

Atmospheric Satellites APUS & APUS DUO

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Turn rate

Rate of turn problem

Solar Flight Technology

Atmospheric Satellites APUS & APUS DUO

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Turn rate

Size over speed limit

The ratio of the size of the aircraft to the average size of natural vortices, caused by thermal activity or turbulence, affects its ability to deal with air disturbances, because the relative difference of aerodynamic forces on the components of the aircraft increases.

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Solar Flight Technology

Atmospheric Satellites APUS & APUS DUO

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APUS DUO

Next Generation

Solar Flight Technology

Atmospheric Satellites APUS & APUS DUO

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APUS DUO

Solar Flight Technology

Atmospheric Satellites APUS & APUS DUO

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APUS DUO

Solar Flight Technology

Atmospheric Satellites APUS & APUS DUO

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APUS DUO advantages

  • More photovoltaic panels
  • Increased wing area
  • The same elongation
  • Lowering the wing span
  • Increased rigidity
  • Improved controls

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APUS DUO

Solar Flight Technology

Atmospheric Satellites APUS & APUS DUO

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APUS DUO

Solar Flight Technology

Atmospheric Satellites APUS & APUS DUO

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Next Step

  • 36m wingspan
  • 8m/s IAS
  • 223kg MTOW
  • 100W 20kg payload
  • 13,000m floor altitude
  • <30 latitudes

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  • SolAero solar panels
  • SionPower batteries