MAINTENANCE MANUAL
SAVANNAH S
Doc. No.:
MM-SVNH-EN
Revision:
07
Rev. Date:
07/11/2022
Proj. Ref.:
SVNH S
A/C:
Savannah S
Applies to Generic Serial Number:
yy-mm-54-xxxx
Page:
73/132
DOC
FMM00
6. Aircraft and Systems description
6.1. Airframe
The
Savannah
TM
S
is a monoplane with a high braced wing, two seat side-by-side airplane. The
airframe is mainly composed of aluminium alloy AL-6061-T6 which has self anti corrosion
characteristics. Additional protection is done in the area of metal sheet overlapping, which are
protected by the application of a thin layer of primer paint. The welded parts are made of steel
25CrMo4 or AISI-304. High stress parts such as the main landing gear spring are made of aluminium
alloy AL-7075-T4. The fuselage is composed of two sections (front and rear) with bulkheads and
reinforcement stringers joined by rivets and solid rivets. The firewall is made of galvanized steel plate
and the seats are an integral part of the cabin structure. Welded Steel tube cabin frame is used to
hold wing attachment points and support forward fuselage loads. The wing airfoil is designed to
generate high lift and the wing adopts Junkers type flaperon (aileron + flap) to improve
manoeuvrability at low speed. The wings are rectangular in plan with small dihedral and without
washout. A “virtual washout” is introduced by different angle between inboard and outboard
flaperons. Wing structure is composed of main and aft spars with a torque box. Two wing struts are
connecting the wing and the fuselage. Horizontal Tail plane is composed of stabilizer and elevator
with anti-balance electric trim tab. Vertical tailplane is composed of conventional fin and rudder.
Horizontal tailplane is bolted to the aft fuselage with four attachment points of the stabilizer. The
vertical tailplane is then connected to the stabilizer and to the rear fuselage cone with six fin bolts.
The engine mount is made of two parts, a inner ring and a fuselage mount, composed of steel
25CrMo4 welded tubes. The two parts are bolted together with silent-blocks in order to dampen
engine vibrations.
A complete description of the structures and parts are given in the dedicated
Construction Manual
,
with related
Spare Parts Catalogue
, which are already indicated in the
Chapter 1.2
Follow few images of the aircraft main structure composition and stiffeners, exploded views. All the
reference numbers (round marks) are related to the Part Numbers shown only in the dedicated tables
of the
Spare Parts Catalogue
.