The GFS-UAV project
A Coanda effect flying saucer
created on March 10, 2006 - JLN Labs - February 25, 2007
Toutes les informations et schémas sont publiés gratuitement ( opensource ) et sont destinés à un usage personnel et non commercial
All informations and diagrams are published freely (opensource) and are intended for a private use and a non commercial use.
The GFS-UAV, propelled by an electric engine, uses the Coanda effect to take off vertically, fly, hover and land vertically ( VTOL ). There is no big rotor like on an helicopter and the flight is very stable and safe for the surrounding. The design of the GFS-UAV N-01A is based on the Geoff Hatton' flying saucer from GFS Project limited.
Le GFS-UAV, propulsé par un moteur électrique, utilise l'effet Coanda pour décoller verticalement, voler, faire du stationnaire et atterrir verticalement ( VTOL ). Il n'y a pas un grand rotor comme sur un hélicoptère et le vol est très stable et sûr pour l'environnement. Le model du GFS-UAV N-01A est basé sur la soucoupe volante de Geoff Hatton de GFS Project limited.
Dec 19, 2006 : The BIG Coanda Saucer N02 has done successfuly its 1st flight
BONUS : The GFS-UAV N01 for the FMS flight simulator
Dec 19, 2006 : FIRST FLIGHT of the BIG Coanda Saucer N02
Manoeuvrability and translation test flights at HIGH SPEED
Outdoor test flights with a wind speed up to 10 km/h
New improvements of the model N-01A (Woow...)
Successful hovering at 3 meters above the ground
The GFS-UAV in action with a video-camera
Photos and a video of the outdoor test flights
Tests flights videos on AFPD and genesis of the project
The GFS-UAV N-01A : Full plan and construction details
The Coanda Effect Test Bench ( CETB )
The N-XX an EHD Coanda Effect craft
The big UAV N-02 construction details
GFS-UAV Project LOGBOOK
March 10, 2006 : Begining of the project - First test flights on AFPD simulator
March 17, 2006 : Computer design of the true UAV model N-01A
March 30, 2006 : 1st preliminary tests of the GFS-UAV N-01A in laboratory.
April 7, 2006 : Successful OUTDOOR tests flights
April 9, 2006 : On Board Video-transmission with the N-01A
April 11, 2006 : Successful demo and test flights in a wide open space
April 12, 2006 : Some impellers tested in the lab
April 16, 2006 : The N-XX project, an EHD Coanda effect craft
April 18, 2006 : New improvements of the model N-01A (Woow...)
April 23, 2006 : Outdoor test flights with a wind speed up to 10 km/h
April 25, 2006 : Manoeuvrability and translation test flights at HIGH SPEED
May 17, 2006 : The construction of the UAV model N02 is now started (updated on July 5, 2006)
October 17, 2006 : UAV N01 flight test/demo at the ENSMP
December 12, 2006 : Training flights with the UAV N01
December 19, 2006 : FIRST FLIGHT of the BIG model N02
Documents, links and references :
PATENTS from GFS Projects Ltd :
Inventor :HATTON GEOFFREY (GB)
Applicant: GFS PROJECTS LTD (GB)
- Craft having aerofoil surface for controlling its spin - Sept 27th, 2006
Abstract of GB2424400 To prevent the spin of a craft designed to move though, or on a surface of a fluid, means are provided to vary the effective surface area of an aerofoil 6. The craft may be of the type in which a fan 2 directs fluid over a dome-shaped canopy 1 utilising the Coanda effect to generate lift, a plurality of aerofoils 6 being used to counter unwanted rotation of the canopy caused by a reaction to the rotation of the fan. Each aerofoil 6 may be driven into or out of a respective slot by means of an actuator controlled by a signal generated in response to comparison of an output signal, produced by an optical or piezoelectric gyroscope, with a desired attitude set by a steering mechanism. The aerofoils 6 may be located where the angle of attack in relation to the airfiows 7, 14 produced by the fan 2 is significantly dependent upon fan speed.
- Craft having flow-producing rotor and gyroscopic stability - Sept 27th, 2006
Abstract of GB2424405 In a craft having a rotor 9A, 9B, 9C producing a flow over an aerodynamic (eg. domed) surface 1, to create lift or thrust, the gyroscopic effect of the rotor, when driven at full power, is such as to give the craft positive stability. The rotor may comprise part of a radial flow fan 2, having blades 9C, and a heavy annular magnet 9B cooperating with fixed coils 7A for effecting drive of the rotor. The resulting angular momentum of the rotor may afford gyroscopic stability enabling the craft to hover close to the ground or a vertical surface. Pitch and roll control may be achieved by vanes PV1, PV2, RV1, RV2 controlled electronically in response to rotation sensed by optical gyroscopes S1, S2 and taking gyroscopic precession into account.
- Thrust generation - Sept 27th, 2006
Abstract of GB2424406 A thrust generation arrangement comprises means 3 to causes fluid to flow over a surface 1 of double convex curvature, the surface 1 causing the fluid to divert from a radial flow towards an axial direction by the Coanda effect. The radius of curvature of the surface 1 decreases progressively less rapidly in a downstream direction. The arrangement may be used to propel a vertical take-off aircraft, the fluid may be caused to flow by a radial fan 3, and the surface 1 may be dome shaped.
- Vehicle steering control - Sept 27th, 2006
Abstract of GB2424463 A vehicle, preferably an aircraft, comprises an impeller (3, fig 2) which in use causes fluid to flow over a surface 1 of the vehicle and produce lift or thrust via the Coanda effect. An intervention mechanism 7 is used to energise a boundary layer 10 of the fluid on the vehicle surface 1 so as to control the point at which separation of the boundary layer 10 from the vehicle surface 1 occurs. The intervention mechanism 7 can thereby operate to control the steering of the vehicle. The intervention mechanism may comprise a vibrating diaphragm 8 and/or a flow of fluid though an opening 6 on the vehicle surface, or a vortex generator.
- March 15, 2006 : UK defence ministry demos Coanda-effect UAV flights ( with Video ) by Flight International
- INVENTION: Flying saucer is out of this world on Peterborough today
- GFS Project limited web site
- Navy successfully simulates effect that may improve low speed maneuverability by J. Slomski and T. Marino (NSWC)
- Misinterpretations of Bernoulli's Law by Weltner, Klaus and Ingelman-Sundberg, Martin Department of Physics, University Frankfurt
- Fluid dynamics : Governing equations, the Coanda effect By Mihaela-Maria Tanasescu - Department of Physics - Texas Tech University
- Ecoulements où la viscosité est négligeable - document du Laboratoire Hydrodynamique et Mécanique Physique (HMP) de l'ESPCI
- The Repulsin, a flying saucer by Viktor Schauberger on Vortex World
- Application of NOTAR Antitorque in helicopter design by Kulair, Inc
- The Henri Coanda biography
- The Repulsin design by JL Naudin
- The Coanda Effect basic experiment by JL Naudin
For more informations, please contact Jean-Louis Naudin : JNaudin509@aol.com
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