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D. Floor
The floor is a rigid GFRP molding. It bonds to the inner-bottom skin of the fuselage shell behind
the firewall. It goes over the T-panel. The center part of the floor makes the center console.
The rear part of the floor makes the front support for the pilot’s seats. It also holds the front of
the control stick support brackets. The rudder pedal assembly for each pilot attaches to the floor
element.
Fuselage
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Figure 2: Front Fuselage Structure
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E. Forward Control Bulkhead
The forward control bulkhead is a rigid GFRP molding. Rigid GFRP inserts make strong-points
which hold the control components. The bulkhead bonds to the fuselage shell, the top of the Tpanel
and the center-tunnel. The control stick support brackets attach to the front face of the
bulkhead.
F. Center tunnel
The center tunnel is a rigid GFRP molding. An insert makes a strong-point which holds the front
mounting for the flap actuator. A rigid GFRP insert holds the locking hook assembly for the main
pins. The center tunnel bonds to the fuselage shells, the bulkhead, forward control and the spar
bridge.
G. Spar bridge
The spar bridge is a rigid GFRP box-section molding. It has layers of carbon cloth on the top
and bottom faces. Each end is a strong web. Carbon cloth gives strength and stiffness to the
webs. The webs bond to the spar bridge to the fuselage shells at the root rib area.
The center area of the spar bridge has 2 pairs of bushes for the wing main bolts. The webs hold
the A and B bolt bushes for the wing attachment. The front face of the spar bridge has a large
bracket for the inner end of the A-bolt. Bonding paste and 8 bolts attach each bracket to the
spar bridge.
The spar bridge also has four attachments for the main landing gear. See Chapter 32-10 for
data about the landing gear attachments.
H. Seat Back
The seat back is a rigid GFRP molding. Carbon tape gives strength and stiffness to the top of
the seat back. A rigid GFRP insert bonds inside the top of the seat back. The insert has strongpoints
for the pilot’s safety belts.
The seat back bonds to the top face of the spar bridge. It also bonds to the fuselage shells.
I. Rollbar
The rollbar is a rigid GFRP molding. Carbon tape gives strength and stiffness to the rollbar. The
rollbar bonds to the inner face of the fuselage shell around the rear cockpit cut-out.
Fuselage
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Figure 3: Rear Fuselage Structure
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J. Aft Control Bulkhead
The aft control bulkhead is a rigid GFRP molding. The middle part has top and bottom flanges
which hold the control bellcranks. The bulkhead bonds to the aft face of the spar bridge. It also
bonds to the fuselage shell.
K. B-bulkhead
The B-bulkhead is a large rigid GFRP molding. The main part of the bulkhead has a slope of
about 45°. The middle of the bulkhead makes a box for the fuel tank. The top part has a box for
the battery.
L. Half bulkhead
The half bulkhead is a rigid GFRP molding. It bonds to the bottom of the fuselage shell just aft
of the B-bulkhead. It has a guide bearing for the elevator control pushrod and holes for the
rudder control cables. It has a cut-out on the right side for a cable conduit.
M. Ring-Bulkhead #1
The ring bulkhead #1 is a rigid GFRP molding. It bonds to the fuselage shell just aft of the half
bulkhead. It has holes for the elevator control pushrod and the rudder control cables. It has a
cut-out on the right side for a cable conduit.
N. Ring-Bulkhead #2
The ring bulkhead #2 is a rigid GFRP molding. It bonds to the fuselage shell half way along the
rear fuselage. It has a guide bearing for the elevator control pushrod and holes for the rudder
control cables. It has a cut-out on the right side for a cable conduit.
O. Ring-Bulkhead #3
The ring bulkhead #3 is a rigid GFRP molding. It bonds to the fuselage shell just forward of the
vertical stabilizer. It has holes for the elevator control pushrod and the rudder control cables. It
has a cut-out on the right side for a cable conduit.
Fuselage
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Figure 4: Vertical Stabilizer Structure
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P. Ring-Bulkhead #4
The ring bulkhead #4 is a rigid GFRP molding. It bonds to the fuselage shell below the vertical
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钻石20系列AMM 2(51)
