Maintenance Manual STEMME S10
Date of Issue: Oct. 01, 1990 Page 12
Amendment No.: Date: --
A4010021_B19.doc
Doc.No.: A40-10-021
3. Description of Assemblies
3.1 Cell, Primary and Secondary Structures
The primary structure includes:
- wing spars, root ribs, and wing spar boxes
- wing shells
- central fuselage framework
- tail boom and vertical stabiliser
- front portion of fuselage
- horizontal stabiliser
- fittings
The secondary structure includes
- control surfaces
- cowlings, cooling air system ducts, cockpit components
3.1.1 Wing
Sandwich shell made of carbon fibre reinforced plastic (CFP), CFP spars.
Consisting of three sections i.e. central wing with a span of 32.5 ft. (9.90 m) and two outboard wing sections
with a length of 21.5 ft. (6.55 m) each.
Attachment to the fuselage by means of four sliding bolts, attachment central wing to outboard wings with one
sliding bolt each.
Removable cowling to cover the wing/fuselage attachment. Beneath the cowling, free access to the wing
attachment, control system joints and the "mixed" aileron/flap controls. Detachment of wing from the fuselage
upwards.
Flaps over the total span of the central wing, ailerons over the total span of outboard wings. Articulation of
flaps and ailerons on the lower side. Symmetrical and asymmetrical cross connection of flap and aileron
controls.
Two-storied Schempp-Hirth air brakes on wing upper side.
Slots of flaps and ailerons sealed with elastic adhesive tape on wing upper side and with textile tape on lower
side.
Boundary layer turbulator (adhesive point tape) on the wing lower side for defined flow transition (special
equipment).
3.1.2 Fuselage and Cockpit
Modular construction of three assemblies bolted to each other: front section of fuselage (CFP-armada-glass
construction), central fuselage framework with cowlings, tail boom (CFP construction).
The loads from the fuselage front section, wing, landing gear, power-plant and tail unit are introduced into the
central fuselage framework.
Cockpit: Two seats arranged side by side. Console between the seats. Seat backs adjustable step by step,
dual controls.