Spratt 103 / photography

The SPRATT 103

is truly the simplest, safest and most economical of all aircraft !

PHOTOGRAPHIES

Construction of the wings Construction of the fuselage Engine General views

VIDEOS

Fast flight

CONSTRUCTION of the WINGS

	Preparation of the composite panels, specific to the design "Spratt 103".
	Drying of the panels (fiberglass fabric + polyester resin + sun).
	Cutting out with hot wire the extruded polystyrene ribs.
	Gluing of the panels of leading edges on the stringers (and aluminium members).
	Gluing of the leading edges panels on the ribs and aluminium spars.
	Reinforcement of the (C box) leading edge (fiberglass fabric + polyester resin).
	Covering of the wings (anti-UV film).
	Test of resistance : + 4 G before distortion (remember that : + 1,5 G is normally the most that wings using the Spratt concept have to support before automatically off-loading the strain. So load tests to + 4 are largely sufficient ).

CONSTRUCTION of the FUSELAGE

	TIG welding of the stainless steel tubes (standard quality and dimensions).
	This is a simple and fast fuselage to realize !
	Test of centering the C.G. (remember that the Spratt 103 is a pendulaire type of wing in the pitch axes !).

	First tests: used a belt reduction unit with the 20 hp Honda engine (unfortunately lacking in power, and too many vibrations due to the reduction unit used).
	Direct drive engine : 25 hp Kolher OHV.
	Actual engine : 23 hp Briggs & Stratton with prototype propeller.

GENERAL VIEWS

	Left side view.
	Front side view.
	Right side view.
	Paris / Le Bourget (june 2002).
	Amphibious version. Front side view.
	Amphibious version. Right side view.
	Amphibious version (Fluctuat nec mergitur !)
	In flight. Right side view.
	In flight. Virage.
	In flight. "Follow this Spratt !"
	Bernard Geffray, the designer and manufacturer of the Spratt 103.