钻石20系列AMM 2(50)

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Doors
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CHAPTER 53
FUSELAGE
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TABLE OF CONTENTS
CHAPTER 53-00 FUSELAGE - GENERAL .............................................................................................1
1. General .............................................................................................................................1
CHAPTER 53-10 FUSELAGE STRUCTURE ...........................................................................................1
1. General .............................................................................................................................1
2. Description ........................................................................................................................3
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CHAPTER 53-00
FUSELAGE - GENERAL
1. General
The DA20-C1 fuselage is a semi-monocoque structure. Two GFRP half-shells make the fuselage
skin. GFRP frames and webs give strength and stiffness. Each half shell also makes the vertical
stabilizer.
The fuselage shells have many layers of glass cloth. Some areas have more glass cloth than other
areas. This gives more strength and stiffness where it is needed.
The frames and webs also have many layers of glass cloth. Some areas have layers of carbon
fiber cloth to give extra strength. Some components also have inserts for attaching brackets or
other components.
Chapter 53-10 gives the data for the fuselage structure.
Fuselage
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CHAPTER 53-10
FUSELAGE STRUCTURE
1. General
This Chapter gives you the data about the fuselage structure. It also includes the vertical stabilizer.
See Chapter 51-00 for data about repair to the structure. The DA20-C1 has these components in
the fuselage structure:
All of the main structural components are GFRP rigid moldings. Many layers of glass cloth bond
together to make each molding. Some components have layers of carbon cloth or tape. This gives
more strength and stiffness.
Most components have rigid GFRP inserts. The inserts give strength and stiffness for attaching
other components such as brackets for controls.
Bonding paste (thickened resin) bonds each component to other components. Most components
also bond to the fuselage shells.
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Figure 1: Fuselage Shells and Front Fuselage Structure
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2. Description
Figures 1 to 4 show the fuselage structure.
A. Fuselage Shells
Two GFRP shells make the outer skin of the fuselage. The shells transmit structural loads. The
shells bond to each other at the top and bottom of the fuselage. Each shell has many layers of
glass cloth. Some areas of the shell have more layers to give more strength and stiffness.
Thickened resin bonds all other structural components to the shells.
Many small components bond to the fuselage shells. These include:
− Air inlet and outlet ducts.
− Conduits for electrical wires, antenna cables and fuel pipes.
B. Firewall
The firewall closes the front of the fuselage. It also holds the attachments for the engine
mounting frame. It has holes for the different systems which connect to the engine.
The firewall is a rigid GFRP molding. A special adhesive bonds a fire-resistant ceramic blanket
to the front face of the firewall. The adhesive also bonds a stainless-steel sheet to the front of
the blanket. Components which go through the firewall also hold the stainless-steel sheet and
blanket to the GFRP molding.
A GFRP extension bonds to the top of the firewall. It carries the seal for the engine cowling.
C. T-Panel
The T-panel bonds to the inner-bottom skin of the fuselage behind the firewall. It gives strength
and stiffness to the front fuselage. It has mountings for the nose landing gear.
　
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