THRUSH AIRCRAFT, INC – MODEL S2R-G10
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 with camloc
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 chemicals.
Each skin panel is etched, primed, and
painted before assembly to ensure
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
1-4
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. The leading edge
structure is made especially strong to
minimize denting and is riveted with
universal rivets for strength. The fuel
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. Flap
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. The
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. The overturn
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. The fiberglass
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. The
cockpit seat belts are anchored to the seat
structure, and the shoulder harnesses are
secured to a steel channel at the bottom of
page Effective: 03/26/2010
To Next Page
Loading...
