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Open minded visitors : Welcome to this site


You will find on Technical page that, such as birds and for reasons of safety, comfort and performance, the aerodynamical logic of an aircraft is to have “free” wings always parallels to airflows

…and on Plans page, you will learn how to built rapidly and economically this fabulous aircraft with simple and comprehensive plans.

So, thank you for your support, “welcome aboard” and as for our wings: Let’s move in the right direction !

Bernard Geffray
Designer of the Spratt 103 

The simplest (200 h of construction), the safest (no stall or spins, absorb turbulences and absolutely reliable) and the most economic of all aircraft (less than 4.000 $, with new injected 4-stroke engine).

Reasons of lies from some competitors and their complicit media.

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Due to its specificities, the Spratt 103 concept is protected by 5 patents with the INPI as well as by copyright in the 163 signatory states of the Bern Convention