SPRATT 103

Pictures

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In flight

Side view
Virage
“Follow this Spratt !”
Landed

Side view
Rear view

Very low drag

Very accessible

(and very simple to drive)
President of the Disabled Pilots confirm it !

Paris airshow, june 2002

First presentation to the public

Amphibious version
Side view
Front view
 

Construction of trike :

TIG welding of the first tubes

Stainless steel and standard sizes

Fuselage simple to realize
Centering checking

Remind : the Spratt 103 is real pendular concept

Construction of wings :

Preparation of the composite panels

Specific to the Spratt 103

Drying of the panels

Fiberglass fabric + polyester resin

Cutting with hot wire the extruded polystyrene ribs
Gluing leading edge panels on the ribs
Gluing the intrados and extrados panels
Reinforcement of the leading edge

= C spar

Final painting

Simply, with a roll

Resistance test at + 4 G

…while this concept undergoes maxi 1.5 G !

Engines :

First tests :

Honda GX620 of 20 hp, with reduction

Low power and too many vibrations due to the reduction unit

Kohler of 23 hp

Correct but not very aesthetic

Briggs & Stratton of 23 hp

with prototype propeller

Dishonest power and too fragile

Honda GX690 of 22 hp

Perfect !

Very economic 25 hp engine

‘2 CV’ Citroen car engine

Ecologic and economic engine in development

Diesel consuming 1 liter per hour of frying oil !

Subaru EH72 with injection, 24 hp

Perfect … but no longer provided

Honda IGX800 with injection, 25 hp

= Actual (R)evolution !

More than perfect ! 2000 $ and 3 years warranty

+ …

Bernard Geffray
Designer of the Spratt 103Named ‘Robin Hood’ in one of the 41 articles in Medias page (link ‘Anticollisions’)  😉

and… Videos