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Ornithopter model EV8

Flapping wing model EV8
Flapping wing model EV8
  • first gliding flight in
  • wing span
  • weight
  • aspect ratio (wing)
  • airfol of arm wing
  • aifoil at the wing tip
  • flapping angle
  • flapping cycle
  • slope of the stroke plane
  • 2000
  • 2.8 m
  • 3.6 kg
  • 11.7
  • S1020
  • E203 (13.6)
  • 60 deg
  • 0.66 s
  • 6 deg
  •  
  • [110 in]
  • [127 oz]
Fuselages of the ornithopter models EV7 and EV8
Comparison of dimension

Due to its smaller drive mechanism the EV8 could be constructed with a relatively slim fuselage. This results in positve effects on its total weight and its handling.

To construct the fuselage is relatively laborious.

  • picture
  • model
  • fuselage diameter max.
  •  
  • left
  • EV8
  • 125 mm
  • 5.9 in
  • right
  • EV7
  • 150 mm
  • 4.9 in
Fuselage-wing transition
Fuselage-wing transition

Sloping of the stroke plane by 6 degrees - from top-back to down-front - results in a straight trailing edge on the fuselage-wing transition (please take a look at the handbook, chapter 8.8).

View into the ports of the fuselage with servos, mechanism and electricity
View into the ports of the fuselage

By concentrating the mechanism between the wings a relatively large amount of space is available in the front part of the fuselage. Yet here, the electronical equipment is not quite complete.

More profound insights show the details of the
drive unit and the functional drive description.

EV8 at gliding flight
First experiments with gliding flight

has been succeeded.
Also high starts have been made.

 
Vane sensor for air speed measuring
Controlling of flight speed

A controller for the flight speed has been tested. When climbing in powered flight it should prevent the stall due to little flight velocity.

Structure of an articulated flapping wing
EV8 top view
Articulated flapping wings

In connection with the EV-Models there have been developed a number of further flapping wing designs from which arose the aeroelastically controlled articulated flapping wing of the EV8.

The gliding flight experiments with the EV8 have been closed successfully in 2003. The first attempt of a power flight did not result in wing flapping due to a handling error - but in an unfortunate landing. A wing spare got broken.