The Sirius is a light single-seater
motorglider, designed by Claude Noin. The first prototype
flew in August 1984. It used a tube, wood and fabric structure
and a 11 m wing ; serial types have a composite fuselage
and a longer wing. The design, focused on economy and performance
at low speeds, features a high wing, a fixed engine and
propeller and a fixed gear, with conventional control system.
Design features : "pod
and boom" design, with pusher engine. Aimed at meeting
French ultralight category certification requirements.
Flying controls : pitch control
by elevator, including a trim tab. Rudder actuated by cables.
Ailerons for roll control. DSF Spoilers / Airbrakes on upper
surface wing. Standard control system (stick and pedals).
Structure : fuselage molded in two
halves of fibreglass/epoxy, with plywood bulkheads. Lexan/polycarbonate
canopy. Fabric-covered rudder. Composites wing structure
with wooden main spar and glass fibre/epoxy stiffened Styrofoam
ribs. Leading edge made of hot wire cut foam laminated with
glass fibre and epoxy resin. Wing covered with heat-shrink
Landing gear : fixed. Main wheel
at CG location. Nose wheel. Small wheels under the tail
and under each wing tip. Drum brake.
Power plant : One JPX-D-320
(18 hp) or one Koenig 3-cylinders (24 hp) engine, driving
a fixed 2-blade propeller . Fuel capacity 19 litres
Accomodation : One pilot, beneath a
one-piece removable canopy. No bagage shelf.