Aircraft Structure; Fuselage; Wing; Empennage - THRUSH S2R – G10 Maintenance Manual

AIRCRAFT MAINTENANCE MANUAL

AIRCRAFT STRUCTURE

FUSELAGE

The fuselage is comprised of a welded
tubular steel frame, fiberglass hopper, and
detachable skins. An overturn structure
forms an integral part of the fuselage
frame. The frame structure is fabricated
from 4130 chrome-moly seamless steel
tubing, and the fittings, bushings, brackets,
and so forth are 4130 steel sheet.
As a corrosion preventative, hot linseed oil
is pumped throughout the entire welded
structure. On an average, 12 gallons are
pumped into the frame and 11 to 11 ½
gallons drain out, leaving a residual interior
coating on all members. The exterior of
the frame is sandblasted, etched, and
primed, which is followed by two coats of
polyurethane paint that is resistant to
chemical reaction.
The fuselage is covered with heat treated
Alclad panels attached
fasteners. Side skins can be removed
using only a screwdriver, thus exposing
the fuselage frame for thorough cleaning
and inspection. All skins are supported
clear of the fuselage tubing to prevent
accumulation of corrosive
Each skin panel is etched, primed, and
painted before assembly
complete coverage. All bottom fuselage
skins around the hopper opening and aft to
the tail post are made of stainless steel.
The skin fasteners in the high corrosion
areas are also stainless steel.

WING

The wing has a constant chord of 90
inches, and is all metal, full cantilever
design. The massive main spar is a
tension field beam structure constructed
from Alclad webs and high strength heat-
treated steel caps. All wing skins, ribs, and
leading edges are constructed from Alclad
heat-treated material.
structure is made especially strong to
minimize denting and is riveted with
1-4
page
THRUSH AIRCRAFT, INC – MODEL S2R-G10
with camloc
chemicals.
to ensure
The leading edge
universal rivets for strength.
tanks, which are located in the inboard
section of the wing, are an integral part of
the structure. Close pitch riveting of the
seams, substantial reinforcement, and
flexible sealants minimize chances of
rupture in crash conditions. Drain holes
are provided in adjacent bays to prevent
accumulation of fuel in the event of a leak.
The ailerons and flaps are all metal
construction and are hinged on ball
bearings. The flaps are electrically
operated by push rods and are completely
sealed against chemical entry.
hinges are stainless steel.

EMPENNAGE

The horizontal stabilizer, elevator, rudder
and vertical fin are an all-metal structure.
All skins, ribs and leading edges are
constructed from alclad material.
movable surfaces are hinged on sealed
bearings that can be easily replaced. The
rudder and the elevator have aerodynamic
balances that are protected by overhangs
on the fixed surfaces.

COCKPIT

There are two choices of the enclosed
cockpit canopies for the Thrush S2R-G10
(1) the SINGLE cockpit canopy or (2) the
DUAL cockpit canopy.
structure of both is exceptionally strong
and welded to "hard points" in the fuselage
frame. The forward bracing supports the
windshield support channels and is welded
to a lateral tube that is curved to provide
more head clearance.
canopy shell has extra thickness on the
top portion and is well attached to the extra
large steel tube structure so that it will
serve as a skid in case of overturn. The
large canopy doors permit easy entrance
to one or both cockpits. The doors should
not be removed for flight, as the aircraft
performance will be degraded.
cockpit seat belts are anchored to the seat
structure, and the shoulder harnesses are
secured to a steel channel at the bottom of
The fuel
Flap
The
The overturn
The fiberglass
The
Effective: 03/26/2010